AS/NZS 3750.
9:1994
Australian/New Zealand Standard
Paints for steel structures
Part 9: Organic zinc-rich primer
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AS/NZS 3750.9:1994
This Joint Australian/New Zealand Standard was prepared by Joint Technical
Committee CH/3, Paints and Related Materials. It was approved on behalf of the
Council of Standards Australia on 27 September 1994 and on behalf of the Council of
Standards New Zealand on 17 October 1994. It was published on 5 December 1994.
The following interests are represented on Committee CH/3:
Australasian Corrosion Association
Australian Chamber of Commerce and Industry
Australian Paint Manufacturers Federation
AUSTROADS
Department of Defence
Government Paint Committee
National Association of Testing Authorities, Australia
Railways of Australia Committee
Retailers Council of Australia
Telecom Australia
Additional interests participating in preparation of Standard:
New Zealand Manufacturers Federation
Telarc New Zealand
Works Consultancy Services
Review of Standards. To keep abreast of progress in industry, Joint Australian/New
Zealand Standards are subject to periodic review and are kept up to date by the issue
of amendments or new editions as necessary. It is important therefore that Standards
users ensure that they are in possession of the latest edition, and any amendments
thereto.
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Full details of all Joint Standards and related publications will be found in the
Standards Australia and Standards New Zealand Catalogue of Publications; this
information is supplemented each month by the magazines ‘The Australian Standard’
and ‘Standards New Zealand’, which subscribing members receive, and which give
details of new publications, new editions and amendments, and of withdrawn
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This Standard was issued in draft form for comment as DR 93269.
AS/NZS 3750.9:1994
Australian/New Zealand Standard
Paints for steel structures
Part 9: Organic zinc-rich primer
First publi shed as AS 2204—1978.
Jointl y revised and redesignated as Joint Standard
AS/NZS 3750.9:1994.
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PUBLISHED JOINTLY BY:
STANDARDS AUSTRALIA
1 The Crescent,
Homebush NSW 2140 Australia
STANDARDS NEW ZEALAND
Level 10, Standards House,
155 The Terrace,
Wellington 6001 New Zealand
ISBN 0 7262 9357 1
AS / NZS 3750.9:1994 2
PREFACE
This Standard was prepared by the Joint Standards Australia /Standards New Zealand
Committee CH/3 on Paints and Related Materials. It is issued as a Joint Standard under
the Active Cooperation Agreement between Standards Australia and Standards New
Zealand.
The objective of this Standard is to provide requirements for organic zinc-rich priming
paint intended for use on iron and steel structures. The Standard also revises and
supersedes the 1978 edition of AS 2204, Zinc-rich organic priming paint. It forms part of
a series of product standards for paints referred to in AS 2312, Guide to the protection of
iron and steel against exterior atmospheric corrosion. This edition has been reformatted
and takes account of revisions to Standards such as AS 2312 and the AS 1580 series of
test methods.
The following Standards in this series have been published:
AS
2364 Paints for steel structures—High-build epoxy (two-pack)
2672 Paints for steel structures—Chlorinated rubber, high-build
2673 Paints for steel structures—Alkyd/micaceous iron oxide
2674 Paints for steel structures—Epoxy primer (two-pack)
3884 Etch primers (single pack and two-pack) for pretreating metal surfaces
3885 Paints for steel structures—Galvanized and zinc primed—Latex
3887 Paints for steel structures—Coal tar epoxy (two-pack)
3750 Paints for steel structures
3750.1 Part 1: Epoxy mastic (two-pack)—For rusted steel
3750.2 Part 2: Ultra high-build paint
AS/NZS
3750.3 Part 3: Heat resisting— Exterior
3750.4 Part 4: Bitumen paint
3750.5 Part 5: Acrylic full gloss (two-pack)
3750.6 Part 6: Full gloss polyurethane (two-pack)
3750.7 Part 7: Aluminium paint
3750.8 Part 8: Vinyl paints— Primer, high-build and gloss
3750.10 Part 10: Full gloss epoxy (two-pack)
The terms ‘normative’ and ‘informative’ have been used in this Standard to define the
application of the appendix to which they apply. A ‘normative’ appendix is an integral
part of a Standard, whereas an ‘informative’ appendix is only for information and
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guidance.
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3 AS / NZS 3750.9:1994
CONTENTS
Page
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE . . . . . . . . . . . . . . . . . . . . . . . . .. . ... .. .. .. .. ... ........ 4
1.2 REFERENCED DOCUMENTS . . . . . . . .. .. ... ... .. ........ ... .. 4
1.3 DEFINITIONS . . . . . . . . . . . . . . . . . . . .. ..... ... .. . .. .. ... .... . 4
1.4 CLASSIFICATION . . . . . . . . . . . . . . . .. ........ .. ... .. .. .. .. .. 4
1.5 COLOUR . . . . . . . . . . . . . . . . . . . . . . .. ... ... .. .. .. .. ... ...... 4
1.6 SAFETY PRECAUTIONS . . . . . . . . . . . .. .... .... .. . .... ... .. .. . 5
SECTION 2 MATERIAL REQUIREMENTS
2.1 GENERAL . . . . . . . . . . . . . . . . . . . . . .. .. . . .. . .. .. .. .. ... ..... 6
2.2 PIGMENT . . . . . . . . . . . . . . . . . . . . . . .. .. . ... .. .. .. .. ... . ..... 6
2.3 CONDITIONS OF TEST . . . . . . . . . . . . .. .. . ... ..... .... ... .. .. . 6
2.4 LIQUID PAINT . . . . . . . . . . . . . . . . . . .. .. . ... . ... .. .. .. .. ... .. 6
2.5 APPLICATION PROPERTIES . . . . . . . .. .. . .. . ............ ... .. 7
2.6 APPLIED FILM . . . . . . . . . . . . . . . . . . .. .. . ... .... .. .. .. .. .... . 7
SECTION 3 PACKAGING AND LABELLING
3.1 PACKAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 LABELLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
APPENDICES
A PURCHASING GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
B INFORMATION ON THE USE AND APPLICATION OF
ORGANIC ZINC-RICH PRIMER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
C MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS
STANDARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
D REFERENCED DOCUMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
E PREPARATION OF TEST PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
F PREPARATION OF PANELS FOR TESTING RESISTANCE
TO WEATHERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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AS / NZS 3750.9:1994 4
STANDARDS AUSTRALIA / STANDARDS NEW ZEALAND
Australian/New Zealand Standard
Paints for steel structures
Part 9: Organic zinc-rich primer
S E C T I O N 1 S CO P E A N D G E NE R A L
1.1 SCOPE This Standard specifies requirements for an organic zinc-rich primer
intended to protect iron and steel against atmospheric corrosion. It is suitable for
application by brush, roller or spray. Type 2 paint specified in the Standard is referred to
in AS 2312 as Paint Reference No. 2.
NOTES:
1 This paint may be used as detailed for systems MP1-B, MP2-C, MP2-D, MP5-E, MP5-F,
MP5-G, MP5-H, MP9-B, MP10-B, LP1-E, LP1-F, LP1-G, LP1-H, LP2-D, LP2-E and LP2-F
in AS 2312.
2 Appendix A contains recommendations and advice on information which should be provided
by the purchaser at the time of enquiry or order.
3 Additional information on the use and application of organic zinc-rich primer is provided in
Appendix B.
4 Alternative methods for determining compliance with this Standard are contained in
Appendix C.
1.2 REFERENCED DOCUMENTS A list of the documents referred to in this
Standard is contained in Appendix D.
1.3 DEFINITIONS For the purpose of this Standard, the definitions given in AS 2310
and those below apply.
NOTE: In New Zealand NZS 2154 should be referred to in lieu of AS 2310.
1.3.1 Organic zinc-rich primer —a material consisting essentially of a dispersion of
metallic zinc dust in an organic medium.
1.3.2 Pot-life — the maximum time, after mixing the two components, thinned as
appropriate, that a two-pack product can be retained for use before there is a deterioration
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of the properties of the deposited dry film, or adverse thickening or thinning that affects
the spraying properties of the material (refer Clause 2.5.5).
1.4 CLASSIFICATION Organic zinc-rich primers shall be classified as follows:
(a) Type 1 — a single-component or multi-component primer which hardens on air-
drying or by reacting with moisture in the atmosphere.
(b) Type 2 — a multi-component primer which hardens by reaction of its constituents
after mixing.
1.5 COLOUR The colour of the product is usually characteristic of the zinc dust
pigment, but to overcome difficulties of differentiating between a coating of paint and a
freshly prepared surface, the product may contain suitable tinting pigments.
NOTE: The product may have differing shades according to the application conditions.
COPYRIGHT
AS/NZS 3750.9:1994 Paints for steel structures - Organic
zinc-rich primer
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