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Corrosion

The document provides corrosion resistance data for various stainless steel and alloy materials. It lists the materials and their resistance to corrosion by various chemicals at different temperatures. A rating of R means the material is resistant, NR means it is not recommended, and ND means no data is available. Footnotes provide additional information on factors that influence corrosion resistance.

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Bijan Zahed Anaraki
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118 views4 pages

Corrosion

The document provides corrosion resistance data for various stainless steel and alloy materials. It lists the materials and their resistance to corrosion by various chemicals at different temperatures. A rating of R means the material is resistant, NR means it is not recommended, and ND means no data is available. Footnotes provide additional information on factors that influence corrosion resistance.

Uploaded by

Bijan Zahed Anaraki
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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CORROSION RESISTANCE DATA

R - The material is RESISTANT to the named chemical up to the temperature shown, subject to limitations indicated by the footnotes on page 87. NR - The material is NOT RECOMMENDED ND - NO DATA is available

Stainless Steel 18/8 (304, 304L & 321) Temperature C Aldyhydes Acetic Acid (10%) Acetic Acid (glac & anh) Acetic Anhydride Acetylene Acid Fumes Alcohols Alphatic Esters Alkyl Chlorides Alum Ammonia Amyl Acetate Aniline Antimony Trichloride Aromatic Solvents Atmospheric: Industrial Atmospheric: Marine Atmospheric: Rural Ascorbic Acid Benzoic Acid Boric Acid Brines, Saturated Bromide (k) soln Bromide (+ aqu) Butyl Acetate Calcium Chloride Carbon Disulphide Carbonic Acid Carbon Tetrachloride Caustic Soda & Potash Cellulose Paint Chlorates of Na, K, Ba Chlorine, Dry 20 R R R R2 R R3 R R R5 R R R R R5 R R7 R7 R R1 R R R8 R9 NR R NR R R R R R R1 R
1

Molybdenum Stainless Steel (316 & 316L) 20 R R R R R R3 R R R5R R R R R R5 R R R R R R R R8 R9 NR R R8 R R R R R R1 R


1

Duplex Ferritic-Austenitic Stainless Steel 20 R R R R R R4 R R R R R R R R R R R R R R R R R NR R R10 R R R R6 R R R


1

3CR12 20 R R ND R2 R NR R R R5 ND R R R NR R R7 R7 R7 R1 R R NR NR NR R NR R R R ND R ND ND
1

60 R R R NR R R3 R R R5 R6 R R R NR R ND ND ND R1 R R NR NR NR R NR R R R R R R1 R
1

100 R R NR NR R R3 R R R5 NR R R R NR R ND ND ND R1 R R NR NR NR R NR ND R R R6 R R1 R
1

60 R R R R R R3 R R R5 R1 R R R R5 R ND ND ND R R R NR R9 NR R NR R R R R R R1 R
1

100 R R R NR R R3 R R R5 NR R R R NR R ND ND ND R R R NR R9 NR R NR ND R R R6 R R1 R
1

60 R R R R R NR R R R R R R R R R ND ND ND R R R R ND NR R R10 R R R R6 R R R
1

100 R R NR R R NR R R R NR R R R NR R ND ND ND R R R R ND NR R R10 R R R ND R R ND
1

60 R R ND NR ND NR R ND ND ND R R R NR R ND ND ND ND R R NR NR NR R NR R R9 R R6 R ND ND
1

100 R1 ND ND ND ND NR R ND ND ND R R R NR R ND ND ND ND R R NR NR NR R NR R NR R R6 R ND ND

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Technical information

CORROSION RESISTANCE DATA


R - The material is RESISTANT to the named chemical up to the temperature shown, subject to limitations indicated by the footnotes on page 87. NR - The material is NOT RECOMMENDED ND - NO DATA is available

Stainless Steel 18/8 (304, 304L & 321) Temperature C Chlorine, Wet Chlorides of Na, K, Mg, Ca, Ni, HN4 , Al, Sn, Zn Chlorosulphonic Acid Chromic Acid (80%) Citric Acid Cresylic Acids (50%) Detergents, Synthetic Emulsiers (all conc) Esters & Ethers Fatty Acids (> C6) Ferritic Chloride Fluorinated Refrigerants, Aerosols eg Freon Fluorine, Dry Formic Acid Fruit Juices Gelatine Glycols Hydrobromic Acid (50%) Hydrochloric Acid (10%) Hydrochloric Acid (conc) Hydrocyanic Acid Hydrouoric Acid Hydrogen Peroxide (30%) Hydrogen Sulphide Hypochlorite (Na 12-14%) Ketones Lactic Acid (100%) Lead Acetate Lead Perchlorate Lime (CaO) 20 NR R10 NR NR R6 R R R R R NR R5 R R R12 R1 R NR NR NR R NR R R5 R14 R R R R1 R 60 NR NR NR NR R6 R R R R R NR R ND NR R R R NR NR NR R NR R R5 NR R NR R R1 R 100 NR NR NR NR R6 R R R R R NR R ND NR R R R ND NR NR ND NR R R5 NR R NR R R1 R

Molybdenum Stainless Steel (316 & 316L) 20 NR R9 R10 NR R R R R R R NR R5 R R R R1 R NR NR NR R NR R R5 R14 R R R R R 60 NR R11 NR NR R R R R R R NR R ND R R R R NR NR NR R NR R R5 NR R R R R1 R 100 NR R11 NR NR R6 R R R R R NR R ND ND R R R ND NR NR ND NR R R5 ND R NR R ND R

Duplex Ferritic-Austenitic Stainless Steel 20 NR R ND NR R R R R R R NR R R R R R R NR NR NR R NR R R5 R14 R R R ND R 60 NR R ND NR R R R R R R NR R R R R R R NR NR NR R NR R R5 ND R R R ND R 100 NR ND ND NR R R R R R R NR R ND ND R R R ND ND ND ND NR R R5 ND R ND R ND R 20 NR R5 ND NR NR R R ND R R NR R5 ND NR R13 R1 R NR NR NR R NR R R5 R14 R NR R NR R

3CR12 60 NR NR ND NR NR R R ND R R NR R ND NR NR R1 R NR NR NR ND NR R R5 ND ND NR R NR R 100 NR NR ND NR NR R R ND R R NR NR ND NR NR ND R NR NR NR ND NR ND R5 ND ND NR R6 NR R

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CORROSION RESISTANCE DATA


R - The material is RESISTANT to the named chemical up to the temperature shown, subject to limitations indicated by the footnotes on page 87. NR - The material is NOT RECOMMENDED ND - NO DATA is available

Stainless Steel 18/8 (304, 304L & 321) Temperature C Manganate, Potassium (K) Meat Juices Mercuric Chloride Milk and Milk Products Molasses Monoethanolamine Naphthalene Nitrates of Na, K, NH3, Ag Nitric Acid (<25%) Nitric Acid (50%) Nitric Acid (90%) Nitric Acid, Fuming Oil, Diesel, Petroleum Spirits Oils, Essential Oil, Lube with Aromatic Acids Oils, Vegetables & Animal Oxalic Acid Perchloric Acid Phenol Phosphoric Acid (20%) Phosphoric Acid (50%) Phosphoric Acid (95%) Phosphorous pentoxide Pyridine Sea Water Silicic Acid Sodium Peroxide Sodium Silicate Sodium Sulphide Starch Sugar, Syrup, Jam Sulphamic Acid 20 R R NR R R R R R R R R R R R R R R6 NR R R R R R R R9 R R16 R R R R12 R18 60 R R NR R R R R R R R NR R2 R R R R NR NR R R R R R R NR R NR R R R R NR 100 R ND NR R R R R R R R NR NR R R R R NR NR R R NR NR R5 R NR R NR R NR R R NR

Molybdenum Stainless Steel (316 & 316L) 20 R R NR R R R R R R R R R R R R R R6 NR R R R R R R R9 R R6 R R R R R 60 R R NR R R R R R R R NR R2 R R R R R16 NR R R R R R R NR R R16 R R R R R19 100 R ND NR R R R R R R R NR NR R R R R NR NR R R R NR R5 R NR R R16 R NR R R NR

Duplex Ferritic-Austenitic Stainless Steel 20 R R R R R R R R R R R R R R R R R NR R R R R17 R R R R R R R R R R 60 ND R R R R R R R R R NR NR R R R R R NR R R R R17 R R R R R R R R R R 100 ND R R R R R R R R R ND NR ND R R R R NR R R R R17 R R R R R R NR R R NR 20 R R7 NR R R R R R R R R ND R R R R NR NR R NR NR NR ND R NR R NR R R6 R R12 NR


6

3CR12 60 ND NR NR NR R R R R R15 R15 NR ND R R R R NR NR R NR NR NR ND R NR R NR R R6 R R12 NR 100 ND NR NR NR R R R R NR NR NR ND R R R R NR NR R NR NR NR ND R NR R NR R NR R R12 NR

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Technical information

CORROSION RESISTANCE DATA


R - The material is RESISTANT to the named chemical up to the temperature shown, subject to limitations indicated by the footnotes below. NR - The material is NOT RECOMMENDED ND - NO DATA is available

Stainless Steel 18/8 (304, 304L & 321) Temperature C 20 60 R R R NR NR NR NR NR NR R2 R R R5 R R R 100 R R R NR NR NR NR NR NR NR R R R5 R R R Sulphates (Na, K, Mg, Ca, Al, Fe) R Sulphates R Sulphur Dioxide, Dry R Sulphur Dioxide, Wet R Sulphur Dioxide, ag soln (96%) R Sulphur Trioxide NR Sulphuric Acid (>50%) NR Sulphuric Acid (70%) NR Sulphuric Acid (95%) R Sulphuric Acid, Fuming R Tannic Acid (10%) R Tartaric Acid R Trichloroethylene R5 Urea (30%) R Water, Pure R Yeast R

Molybdenum Stainless Steel (316 & 316L) 20 R R R R R R5 R16 NR R R R R R5 R R R 60 R R R R R R5 NR NR NR R R R R5 R R R 100 R R R NR R R5 NR NR NR NR R R R5 R R R

Duplex Ferritic-Austenitic Stainless Steel 20 R R R R R R5 R NR R R R R R5 R R R 60 R R R R R R5 R NR NR R R R R5 R R R 100 R R R NR R R5 NR NR NR NR R R R5 R R R 20 R NR R NR NR NR NR NR R15 R2 R NR R5 R R R

3CR12 60 R NR R NR NR NR NR NR NR R2 R NR R5 R R R 100 R NR R NR NR NR NR NR NR NR NR NR R5 R R R

Footnotes
1 2 3 4 5 6 7 8 9 10 11 12 13 14

Pitting & crevice corrosion resistance


Exposure in chloride containing media can result in localised corrosion. In order of increasing resistance to localised corrosion: 3CR12 <304L <316L <Duplex

15 16 17 18 19

not if chlorides present limited data depends upon the acid dry acid fumes, attack may occur if moisture builds up anhydrous depends upon concentration may discolour with time in strong solutions only when inhibited pitting possible in stagnant conditions possibility of pitting may cause stress corrosion cracking when free of SO2 may cause contamination of product dilute hypochlorites can be used to sterilise some stainless steel with extreme care general corrosion may become excessive 10% in the absence of impurities dilute some attack at high temperatures

Conditions for avoiding pitting and crevice corrosion


Design vessels for complete drainage - avoid sharp corners and stagnant areas. Close crevices and lap joints by continuous welding. Remove solids in suspension. Prevent sedimentation. Ensure continuous agitation and adequate ow rates. Use compressive non-absorbent gaskets or inert sealing compounds. Ensure non-impairment of passive surface. Repair/ restore any affected areas.
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