NOTICE: This standard has either been superseded and replaced by a new version or discontinued. Contact ASTM international (www.astm.org) for the latest information. af) Designation: A 123/A 123M - 01 Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products' ‘issu issucd under th ed designation A 123/123 he munber nme following he dsigtion inde the oar ‘of rg adpson one es fos, he ero nt revision A number in pases nn he ys of at pe. ‘A spemerip apn (2) nates a eit shag since the et revson or epg ‘This standard hs been approve for use by agencies of the Deparment of Defoe 1. Scope LI This specification covers the requirements for zinc ‘coating (galvanizing) by the hot-dip process on iron and steel products made from rolled pressed and forged shapes, castings, plates, bars, and strips 1.2 This specification covers both unfabricated products and fabricated products, for example, assembled steel products, structural stel fabrications, large tubes already bent or welded before galvanizing, and wire work fabricated from uncoated steel wire. This specification also covers stel forgings and iron ‘castings incorporated into pieces fabricated before galvanizing ‘or which are too large to be centrifuged (or otherwise handled to remove excess galvanizing bath metal) Nors_I—This specification covers those products previously addressed in Specifieations A 123-78 and A 386-78 1.3 This specification does not apply to wire, pipe, tube, or steel sheet which is galvanized on specialized or continuous Tines, orto stel less than 22 gage (0.0299 in.) (0.76 mm) thick. 1.4 The galvanizing of hardware items that are to be centrifuged or otherwise handled to remove excess zinc (such as bolts and similar threaded fasteners, castings and rolled, pressed and forged items) shall be in accordance with Spe fication A 1S3/A 153M. 1,5 This specification is applicable to orders in either inch-pound units (8s A 123) or SI units (as A 123M). Inch- ound units and SI units are not necessarily exact equivalents Within the text of this specification and where appropriate, ST units are shown in parentheses. Each system shall be used independently of the other without combining values in any way. In the ease of orders in SI unis, al testing and inspection shall be done using the metric equivalent of the test or inspection method as appropriate. In the case of orders in ST units, such shall be stated to the galvanizer when the order is placed. 2, Referenced Documents 2.1 ASTM Standards: "nis seston is inde the juriston of ASTM Commie QS on Melle Coted Irn and Sioa Produc adit the et responsibilty OF Subsonitee AOSTS on Structural Sp and Hardware Spiess ‘Cmrent dito eproved June 10,200. Published August 2001, Orgally puis as 12828 Las rvous dion A 1230. A4TIA4TM Specification for Ferstic Malleable Iron Cast- ings? ‘AS0/A 90M Test Method for Weight [Mass] of Coating on Tron and Steel Articles with Zinc or Zine-Alloy Coatings? A143 Practice for Safeauarding Against Embritlement of Hot-Dip Galvanized Structural Steel Products and Proce- dure for Detecting Embrittlement® A 153/A 153M Specification for Zine Coating (Hot-Dip) on Iron and Steel Hardware* ‘A384 Practice for Safeguarding Against Warpage and Dis- tortion During Hot-Dip Galvanizing of Steel Assemblies? A385 Practice for Providing High-Quality Zine Coatings (ot-Dip)? A 653/A 653M. Specification for Steel Sheet, Zine-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvennealed) by the Hot-Dip Process? ‘A 780 Practice for Repair of Damaged and Uncosted Areas of Hot-Dip Galvanized Coatings? ‘4-902, Terminology Relating to Metallic Coated Steel Prod- vets? B6 Specification for Zine* B487 Test Method for Measurement of Metal and Oxide Coating Thieknesses by Microscopical Examination of a Cross Section® B 602 Test Method for Attribute Sampling of Metallic and Inorganic Coatings® E376 Practice for Measuring Coating Thickness by Magnetic-Field or Fddy-Current (Electromagnetic) Test Methods* 3. Terminology (See Fi 3.1 Definitions: 3.1.1. The following terms and definitions are specific to this specification, Terminology A 902 contains other terms and definitions relating to metallic-coated steel products. 3.2 Definitions of Terms Specific to This Standard 3.2.1 average coating thickness, n—the average of three specimen coating thicknesses. 1) 3 dn ook of ASTM Sto, V6 0.02. 2 dnl Book af ASTM Sion, Vel 0.06. ‘Anal Book of ASTH Stands, Wl 0268 Smal Book 0f ASTM Stand, We 0205. “Anal Book of ASTH Standard, Wo 0308ib A 123/A 123M tc Aries whose Surface Area is greater than 160 sain, (100,000 sq. mm) Lot ‘Test Antcles Sample each composed of ‘8Specimens, aon Each Specimen (5 or more measurements widely dispersed) must have Minimum Average Coating ‘tnbiness (lable) race all EachTest Article in the Sample (3 Specimens each) must i Specimen have Minimum Average Coating Thickness of (Table 1) Artles whose Surface Avea is equal 0 or less than 160 sq.n, (100,000 sq mm) sec Ane | a a a Each Specimen (5 or more measurements widely dispersed) must Fa Ste ag Se ns a aca All Test Articles (Specimens) Together must have Minumum ‘Average Coating Thickness of (Table 1) FIG. 1 Single- and Mult-Specimen Articles 3.2.2 lack, ad—denotes the condition of not galvanized or _3.2.3 coating thickness grade, n—the numerical value from otherwise coated. For purposes of this specification the word Table 1 at the intersection of a material category and @ “black” does nat refer to the color or condition of surface, orfo thickness range. ‘8 surface deposit or contamination, 3.2.4 material category, n—the general class or type of ‘TABLE 1 Minimum Average Coating Thickness Grade by Material Category “Al Specinons Tested uses crear, Stal Tcanees Range esr) or) Sates 2048) Yate A PUB) aay ‘Swuival Shapes ord Pile 6 5 75 5 10 St end Sar Pe 6s 15 es ‘00 Pope and Tora s s 5 8 78 Mi % 0 oo 5 o(ib A 123/4 123M ‘material or process of manufacture, or both, that nominally describes a unit of product, or from which a unit of product is, ‘made, For example, bar grating belongs tothe category “strip,” handrail belongs to the category “pipe,” ete. 3.2.5 multi-specimen article, n—a unit of product, whose surface area is greater than 160 in? (100000 mm). For thickness testing purposes, articles whose surface area is _ateater than 160 in are subdivided into three continuous local sections, nominally equal in surface area, each of which constitutes a specimen. In the case of any such local section containing more than one material category or stel thickness range as delineated in Table 1, that section will contain more than one specimen (see Fig. 1) 3.26 sample, n—a collection of individual units of product from a single Tot selected in accordance with Section 7, and intended to represent that lot for acceptance. If a sample is ‘taken as representing the lot for acceptance, the sample shall be taken at random from the lot without regard to the perceived {quality oF appearance of any individual unit in the Tot being sampled, The sample consists of one or more test articles. 3.2.7 single-specimen article, n—a unit of product whose surface area is equal to or less than 160 in? (100 000 mim?) o that is centrifuged or otherwise similarly handled in the galvanizing process to remove excess galvanizing bath metal (Gree zinc). For thickness testing purposes, the entire surface area of each unit of product constitutes a specimen. In the case of any such article containing more than one material category of steel thickness range as delineated in Table 1, that article will contain more than one specimen (see Fig. 1) 3.2.8 specimen, »— the surface of an individual test article cr a portion of a test article, upon which thickness measure ‘ments are to be performed, which is a member of a lot, or a member of a sample representing that lot. Far magnetic thickness measurements, specimen excludes any area of the surface which is subject t0 processes (such as flame cutting, ‘machining, threading, etc.) that can be expected to result in surface conditions not representative of the general surface condition of the test article, or is disqualified by the measure ‘meat method, The minimum average coating thickness grade for any specimen shall be one coating grade below that required for the appropriate material category and thickness in Table |. For a unit of product whose surface area is equal to oF less than 160 in (100.000 mm), the entire surface area of each test article constitutes a specimen. In the case ofan article containing more than one material category or steel thickness range a delineated in Table 1, that article will contain more than one specimen, as appropriate (see Fig. 1). 3.2.9 specimen coating thickness, n—the average thickness from no less than five test measurements on a specimen, when each measurement location is selected to provide the widest dispersion (in all applicable directions) of locations for the steel category of the test article within the confines of the specimen volume, 3.2.10 est article, n— an individual unit of product chat is ‘a member of the sample and that is examined for conformance to-8 part of this specification, 4. Ordering Inform: 4.1 Orders for coatings provided under this specification shall include the following: 4.1.1 Quantity (number of pieces to be galvanized) and total weight. 4.1.2 Deseription (type and size of products) and weight. 4.13 ASTM specification designation and year of issue. 4.1.4 Material identification (see 5.1) and surface condition or contamination. 4.1.5 Sampling plan if different ftom 7.3. 4.1.6 Special test requirements (see 8.1) 4.1.7 Special requirements (special stacking, heavier coat- ing weight, ec) 4.1.8 Tagging or piece identi ation method. 5. Materials and Manufacture 5.1 Steel or Tron—The specification, grade, or designation and type and degree of surface contamination of the iron or steel in articles to be.galvanized shall be supplied by the purchaser to the hot-dip galvanizer prior to galvanizing. [Nore 2—The presence in tcl and weld meal, incerta percentages, ‘of some elements sich as silicon, carbon, and phosphorus tends 1 ‘aoceerate the growth ofthe zin-iron alloy layer so tha he coating may Ihave matte nish with litle oF no outer zine layer. The glvanigr as ‘only limited contol over this condition, The mas, shape, and amount of old working of the product being galvanized’ may also affect this ‘condition. Practice A 385 provides guidance on sicel selection and Ciscusses the effets of various elements in seel compositions (Tor ‘example, slcon), tha influence costing weight and sppearance 5.2 Fabrication—The design and fabrication ofthe product to be galvanized are the responsibilities of the designer and the fabricator, Practices A 143, A 384, and A 385 provide guidance for steel fabrication for optimum hot dip galvanizing and shall ‘be complied with in both design and fabrication. Consultation ‘between the designer, fabricator, and galvanizer at appropriate slages in the design and fabrication process will reduce future problems. 5.3 Castings —The composition and heat treatment of iron ‘nd steel castings shall conform to specifications designated by the purchaser. Some types of castings have been known to show potential problems with predisposition to being em- brittled during the normal thermal cycle of hot-dip galvanizing, It is the responsibility of the purchaser to heat treat or ‘otherwise allow forthe possibility of such embritting phenom- cna, The requirements for malleable iron castings to be galvanized shall be as stated in Specification A 47. 3.4 Zinc—The zine used in the galvanizing bath shall conform to Specification B6. If a zinc alloy is used as the primary feed to the galvanizing bath, then the base material used to make that alloy shall conform to Specification B 6. 5.5 Bath Composition—The molten metal in the working ‘volume of the galvanizing bath shall contain not less than an average value of 98.0% zine by weight. Nore 3—The galvanizer may choose toad trace amounts of certain ements (or example, alurinum, nickel, and tn othe ane bath to elp in the proctssing af coin reactive steels or 10 enhance the cosmetic sppeirance ofthe fnishod product. The we ofthese trace clement is petmited provided thatthe bulk chemistry ofthe galvanizing bath is at Teast 98,0 %zin By weight, The elements ean be added the galvanizing buh a part of pre-allyed zine fed, or they canbe added to the bath by the galvanizer using a master fed alloy.lb A 123A 123M 6. Coating Properties 6. Coating Thickness—The average thickness of coating for all specimens tested shall conform to the requirements of Table I fr the categories and thicknesses ofthe material being galvanized. Minimum average thickness of coating for any individual specimen is one coating grade less than that required in Table 1. Where products consisting of various material thicknesses or categories are galvanized, the coating thickness arades for each thickness range and material category of ‘material shall be as shown in Table 1. Inthe case of orders in SL units, the values in Table 1, shall be applicable as metric units in micrometres. In the eas of ender in inch-pound units, the measured value shall be converted to coating grade units by the use of Table 2. The specification of costing thicknesses heavier than those required by Table 1 shall be subject to mutual agreement between the galvanizer and the purchaser. (Fig. 2 is a graphic represenlation of the sampling and specimen delineation steps, and Fig 3 isa graphic representa tion of the coating thickness inspection steps) 6.11 For articles whose surface arca is greater than 160 in. (100 000 mm?) (multi-specimen articles) each test article in the sample must meet the appropriate minimum average coating thickness grade requirements of Table 1, and cach specimen coating thickness grade comprising that overall average for each test article shall average not less than one coating grade below that required in Table | 6.1.2 For articles whose surface area is equal to or less than 160 in? (100 000 mm?) (single-specimen articles), the average of all test articles in the sample must meet the appropriate ‘minimum average coating thickness grade requirements of Table 1, and fr each test aril, its specimen coating thickness shall be not less than one coating grade below that required in Table | 6.1.3 No individual measurement, or cluster of measure- ments at the same general location, ona test specimen shall be cause for rejection under the coating thickness requirements of this specification provided that when those measurements are averaged with the other dispersed measurements to determine the specimen coating thickness grade for that specimen, the requirements of 6.1.1 or 6.1.2, as appropiate are met [Nore 4—The coating thickness grades in Table {represent the mini ‘mum value obainable with a high level of confidence for the ranges typically found in each material category. While most coating thicknesses will be in excess of those vals, some materials in each eaeyory may be Specimen Specimen Specimen Nove I—Each specimen comprises somially one thin of the toil surface azca of the aicle. A minimum of ive measuremens shoud be ‘made within she volume of each specimen, as widely dispersed within that volume asi practical, so ast represent as much as posible, the general outing thickness within that specimen volume, FIG. 2 Articles Made of Many Components less reactive (fr example, because of chemistry or surface condition) than ‘other materials ofthe ses} category spectrum. Therefor, some articles may havea cating grade ator close to the minimum requirement shown in Table 1. In such cases, the precision and accuracy of the coming thickness measuring technique shouldbe taken inte consideration when txjocting such articles Tor contng thickness Below that required by this Spoification, Purchasers desing a guaranies of heavier coatings than the ‘lnimum thicknesses shown herein should use the special requirements (Gee 4116) 1 specify coating thickness grades higher than Howe shown in Table I. In addition, the purchaser should anticipate the need for est batches or extra preparation steps, oF both, such as blasting before salvanizing o ether mcthods, to atiemp 1 seach the higher requirements ‘vith consistency. Some higherthan-standard thicknesses may be imprac tical or unstanabe 62 Finish—The coating shall be continuous (except as provided below), and as reasonably smooth and uniform in thickness as the weight, size, shape of the item, and necessary hhandling ofthe item during the dipping and draining operations at the galvanizing Kettle will permit. Except for local excess coating thickness which would interfere with the use of the product, or make it dangerous to handle (edge tears or spikes), rejection for nonuniform coating shall be made only for plainly visible excess coating not related to design factors such as holes, joints, or special drainage problems (see Note 6). Since surface smoothness is a relative term, minor roughness that does not interfere with the intended use of the product, of roughness that is related to the as-received (un-galvanized) surface condition, steel chemistry, or steel reactivity to zine TABLE 2 Costing Thickness Grade” oa rile can vm on? e ta So & a * 20 12 5 155 22 3 85 0 o ba aa 2 es e 28 48 & 0 %5 30 a 13 Po © u 19 0 a a5 33 20 5 0 10 39 23 100, EY “7 Conversions Table Para tase on he metic icknes vate equiva fom the naa eae wlon i pestcton wang conversa ators canst wihqb A 123/A 123M Selet Tor aris as sccordngie Sameing |) napsen The Samp) Teton Inspect each Materia (Catogery Separaly (One Specimen ‘rea > 160 in? oF or Test aricle 400,000 ne, ‘Subdivide Each Test "Tesi Each Specimen ‘cieinto Tree | >] for Compliance wth ‘Specimen ‘Section 61 Escn Specimen ‘va, Cemplce sth Section 6:1 _______+| FIG. 3 Coating Thickness Inspection Stops shall not be grounds for rejection (see Note 7), Surface conditions related to deficiencies related to design, detailing, of fabrication as addressed by Practice A 385 shall nt be grounds for rejection. The zine coating on threaded components of articles galvanized under this specification shall conform to that required in Specification A 153/A 153M. Surfaces that remain uncoated after galvanizing shall be renovated in accor dance with the methods in Practice A 780 unless directed by the purchaser to leave the uncoated areas untreated for subse~ ‘quent renovation by the purchaser. 6.2.1 Each area subject to renovation shall be I in. (25 mm) or less in its narrowest dimension, 6.2.2 The total area subject {0 renovation on each article shall be no more than ¥ of 1% of the accessible surface area to be coated on that article, or 36 in (22 $00 mm’) per ton of piece weight, whichever is less. [Nore $—Inaccesiblesurfice ares are those which canst be reached for appcopriat surface preparation and aplication of ropa materials as escibed in Practice A 780, Such inaccessible areas, or example, would be the internal surfaces of ceria tnks, ples, pipes, tubes, and so forth, 6.2.3 The thickness of renovation shall be that required by the thickness grade for the appropriate material category and thickness range in Table 1 in accordance with the requirements of 6.1, except thet for renovation using zine paints, the thickness of renovation shall be 50 % higher than that required by Table 1, but not greater than 4.0 mil 62.4 When areas requiring renovation exceed the criteria previously provided, or are inaccessible for repair, the coating shall be rejected. Nore 6—The requirement for the finish of a galvanized product res themselves to vst type of inspection, They do nat aes the ‘ater of measured coating thickness variations thal ean be encountered bowause of diferent sels or diferent thicknesses ofa given steel being sed in an asc [Nove 7-H which are prepared for galvaniring by abrasive clea {ng wil gonerlly develop 2 thicker coating with & moderately rougher surface, 63 Threaded Components in Assemblies — The zine coating ‘on external threads shall not be subjected to a cutting, rolling, or finishing tool operation, unless specifically authorized by the purchaser. Internal threads are not prohibited from being tapped or retapped after galvanizing. Coatings shall conform to the requirements of Specification A 153/A 153M. 64 Appearance—Upon shipment from the galvanizing fa- cility, galvanized articles shall be free from uncoated areas, blisters, flux deposits, and gross dross inclusions. Lumps, projections, globules, or heavy deposits of zinc which will interfere with the intended use of the material will not be permitted. Plain holes of 4-in, (12.5-mm) diameter or more shall be clean and reasonably free from excess zinc. Marks in the zinc coating caused by tongs or other items used in handling the article during the galvanizing operation shall not ‘be cause for rejection unless such marks have exposed the base metal and the bare metal areas exceed allowable maximums from 6.2.1 and 6.2.2. The pieces shall be handled so that after ‘galvanizing they will not freeze together on cooling Nore 8 Whenever dost is present in a form oor than finely ispersd pimples in the coating and is preset in sich an amount as tobe ‘susceptible to mechanical damage, i wil be considered as "gros forthe purposes of 6.4. [Nove 9—Depending upon prot design oF moral thickness, oF both, filming or excess zine buildup in plain holes of less than in (125-mm) diameter may occu that requires adtional Wook to make the holes ustle as intended 6.5 Adherence—The zinc coating shall withstand handling ‘consistent with the nature and thickness of the coating and the normal use of the article, without peeling or fisking [Nore 10—Although some material may be formed aftr galvanizing in general the zine coating on the articles covered by this spoiicaton is oo avy to permit severe bencing without damaging the coating. 7. Sampling 7.1 Sampling of each lot shall be performed for conform- ‘ance with the requirements of this specification. 7.2 A lot is @ unit of production or shipment from which a sample is taken for testing. Unless otherwise agreed upon ‘between the galvanizer and the purchaser or established withinba 123/A 123M this specification, the lot shall be as follows: For testing at a galvanizer's facility, a lot is one or more articles of the same type and size comprising a single order or a single delivery load, whichever is the smaller, or any number of articles identified as a fot by the galvanizer, when these have been galvanized within a single production shift and in the same ‘ath, For test by the purchaser after delivery the lot consists of | the single order or the single delivery load, whichever is the smaller, unless the lot identity, established in accordance with the above, is maintained and clearly indicated in the shipment by the galvanizer. 7.3 The method of selection and number of test specimens shall be agreed upon between the galvanizer and the purchaser. Otherwise, the test specimens shall be selected at random from ‘each lot In this case, the minimum number of specimens from ‘each lot shall be as follows: umber of Pecos inet umber of Specimens a 500 ° soto 1200 5 101163200 a 2010 10 009 a 10001 and over 2 Nowe Where a number of identical items are tobe galvanized, a sisal sampling pan muy be desir. Such plan i contained in Test “Meth B02 which adresses sampling proces fr the inpecton of tlecadeposied metic coatings and roe fishes. If Tet Metod ‘Bend sunt, the level of samping stall be aged upon Betvoen the slvanzer nd he porcine a the ine the cating over is pce 74 A test specimen which fils to conform toa requirement of this specification shall not be used to determine the conformance © other requirements 8. Test Methods 8.1 Test Reyuirements—The following tess shall be con- ducted to ensure that the zine coating is being furished in accordance with this specification. The specifying of test for aclhesion and embritlement shall be subject to mutual agree- tment between the gavanizer and purchaser. Visual inspection af the coating shall be made for compliance withthe require= ments 82 Thickness of Coating Test—The thickness of coating is determined by one oF more of the three methods described as follows B2.1 Magnete Thickness Measurements The thickness of the coating shall be determined by magnetic thickness gage measurements in accordance with Practice E 376 unless the methods described in 8.2.2, 82.3, or 8.2.4 are used. For each specimen (as described in 3.2.8) five oF more measurements Shall be made at points widely dispersed throughout the volume occupied by the specimen sos to represent as much 2s practical, the entire surface area of the test specimen. The average of the five or more measurements this made for each specimen is the specimen coating thickness. 82.1.1 For articles whose surface area is greater than 160 jn? (100000 mm) (mult-specimen articles as described in 3.23), the average of the three specimen coating thickness Brades comprising each test article is the average coating thickness for that test article. A specimen must be evaluated for cach steel category and material thickness within the equire- ments for each specimen ofthe test article $.2.1.2 For articles whose surface area is equal to oF less than 160 in? (100 000 mm?) (singlespecimen articles as described in 32.7), the average of all specimen coating thickness grades is' the average costing thickness for the sample £2.13 Inthe ease of threaded components, the thickness of| coating shall he made on portion ofthe article that does not include any threads 82.14 The use of magnetic measurement methods is ap- propriate for lager aficles, and is appropriate for smaller articles when there is sufcient at surface area forthe probe tip to sit fat on the surface using Practice E 376. 8.22 Stripping Method—The average weight of coating Shall be determined by stripping a test anticle, a specimen removed from & test article, or group of test articles in the case of very small items such as nails, ec in accordance with Test Method A 90/A 90M unless the methods described in 82.1, 82.3, or 8.24 are used, The weight of coating per unit area thus determined is converted to equivalent coating thickness values in accordance with Table 2 (rounding up or down as approprite) The thickness of coating thus obtained i the test article coating thickness, or inthe case ofa specimen removed from a test aticle, isthe specimen average costing thickness 822.1 The stripping method is a destructive test and is appropriate for single specimen articles, but isnot practical for ‘mult-specimen articles. 823 Weighing Before and Afler Galvaniing—The average weight of coating shall be determined by weighing articles before and after galvanizing, subtracting the first weight from the second and dividing the result by the surface area unless the methods described in 8.2.1, 82.2, of 8.2.4 are used. The first ‘weight shall be determined after pickling and drying and the second after cooling to ambient temperature. The weight of coating per unit area thus determined is converted to equivalent coating thickness values according to Table 2 (rounding up or ddown as appropriate). The thickness of coating thus obtained is the test article coating thickness 8.23.1 The weighing before and after method is appropriate for single-specimen articles, but is not practical for multi specimen ancl, [Nort 12—Both he sipping method andthe weighing before and after method dono take ito account the weight of iron reacted from the article ‘hati incorporated nto the coating. Thus, the methods may underestimate ‘coating weight (and therefore the ealulted thickness) by upto 10%. The ‘sccuracy ofboth methods wil be influenced by the acuracy fo which the surface area ofthe atles ested ean be determined 8.2.4 Micrascopy—The thickness of coating shall be deter- ‘mined by cross-sectional and optical measurement in accor- dance with Test Method B 487 unless the methods described in 8.2.1, 8.22, or 8.2.3 are used. The thickness thus determined is 4 point value. No less than five such measurements shall be ‘made at locations on the test article which are as widely dispersed as practical, so as to be representative of the whole surface of the est article. The average of no less than five such ‘measurements is the specimen coating thickness 8.2.4.1 The microscopy method is a destructive test and is appropriate for single-specimen article, but is not practical for(ib A 123/ 123M rulti-specimen articles. 82.5 Referee Method—In the event of a dispute over thickness of coating measurements, the dispute shall be re- solved as follows: {8.2.5.1 For multi-specimen articles, new sample shall be taken randomly from the lot of material, which has twice the ‘number of test articles as the sample which failed to conform to this specification. If che lot size is such thatthe sample size ceannot be doubled, then the sample size shall be as previous, but the number of widely dispersed sites at which measure ‘ments were made shall be doubled, and these sites will constitute the new sample, This new sample shall be measured. ‘using magneti thickness goges which have been calibrated for accuracy against reference material thickness standards. Ifthe Tot is found to be nonconforming by the new sample, the galvanizer has the right to sort the lot for conforming articles by individual test, to re-galvanize non-conforming articles, or to renovate the nonconforming articles in accordance with 6.2. 8.2.5.2 For single-specimen articles, @ new sample shall be taken randomly from the lot of material, which has twice the ‘number of test articles as the sample which failed to conform to this specification. The test method for the new sample shall be selected by mutual agreement between the purchaser and ‘galvanizer. If the lt is found to be nonconforming by the new sample, the galvanizer has the right t0 sort the lot for conforming articles by individual test, to re-galvanize non- conforming articles, or to renovate the nonconforming articles in accordance with 62. 83 Adiesion—Determine adhesion of the zine coating 0 the surface ofthe base metal by cutting or prying with the point ‘of a stout knife, applied with considerable pressure in a manner tending to remove a portion ofthe coating. The adhesion shall, be considered inadequate ifthe coating flakes off in the form of a layer of the coating s0 as to expose the base metal in advance ‘of the knife point, Do not use testing carried out at edges or ‘comers (points of lowest coating adhesion) to determine adhesion of the coating. Likewise, do not use removal of small particles of the coating by paring or whittling to determine failure. 8.4 Embrittlement—Test for enibittlement shall be made in accordance with Practice A143. These tests shall not be required unless strong evidence of embritlement is present. 9, Inspection, Rejection, and Retest 9.1 Inspection by the Galvanizer—It isthe responsibility of the galvanizer to ensure compliance with this specification ‘This shall be achieved by an in-plant inspection program designed to maintain the coating thickness, finish, and appear- ance within the requirements of this specification unless the inspeotion is performed in accordance with 9.2. 9.2 Inspection By the Purchaser—The purchaser shall ac- cept ot reject material by inspection either through the galva~ nizer’s inspector, the purchaser's inspector, or an independent inspector. The inspector representing the purchaser shall have ‘access at all times to those areas of the galvanizer's facility ‘which concem the application of the zinc coating to the ‘material ondered while work on the contract of the purchaser is being performed. The galvanizer shall afford the inspector all reasonable facilities to satisfy him thatthe zine coating is being. fumished in accordance with this specification, 93 Location—The material shall be inspected atthe galva- nizer's plant prior to shipment. However, by agreement the purchaser is not prohibited from making fests which govern the ‘acceptance or rejection of the materials in his own laboratory ‘of elsewhere, 9.4 Reinspection—When inspection of materials to deter mine conformity with the visual requirements of 6.2 warrants, rejection of a lot, the galvanizer is not prohibited from sorting the lot and submit it once again for acceptance after he has removed any nonconforming articles and replaced them with conforming articles 9.5: The sampling plan that was used when the lot was first inspected shall be used for resampling of a sorted lot. By mutual agreement, the galvanizer is not prohibited from submitting the Jot remaining after sorting and removing non= ‘conforming articles without replacement of the nonconforming articles. In such case, the now-smaller lot shall be treated as & new lot for purposes of inspection and acceptance. 9.6 Materials that have been rejected for reasons other than ‘embrittlement are not prohibited fom being stripped and tegalvanized and again submitted for inspection and test at ‘which time they shall conform to the requirements of this specification. 10. Certification 10.1 When specified in the purchase order or contract, the purchaser shall be furnished certification that samples repre senting each lot have been either tested or inspected as directed by this specification and the requirements have been met. ‘When specified in the purchase order or contract, a report of the test results shall be furnished, 11. Keywords 11.1 coatings—zine; galvanized costings; steel products— metallic coated; zine coatings—steel products ‘Tre American Sect fr Testing and ate takes no postion respecing the vay of any gents asserted in conection nth ty ham montone nthe sioner User fh tana ate expres avon at Gteminatn of e vey ar Such Dato fghts an he nak of nngemnt of ich Ags, ar nie) te own responsi “standard subject to rovison a any ne byte reggae etic commie ard mst be evewes oven ears rotten aberreapprored ovmifaeann Your Comments rented ear frrevison fis stardord of aitonal stands oo oa eee att Hesaguaers. Your commons vi receive coe Contestant a meetng ofthe responsible ict commtes, ahh you my ford yu el at your comments havent received # fa heanng you sata meke Your (ios noun t tho ASTM Comics on Standards, atthe adress how Gow ‘i stn copyihled by ASTH, 10 at Harbor Drive, PO Box C7, Wes! Censhahockan, PR 19426-2688, Ud Stes. nat Toons (engl or mehige apes) of fue standard maybe lind by conacng ASTM atthe aBove acess oF at Fe pa 610832 88x) concearin org (ea); o ough he ATH webs (wan ssi Oo}