AS/NZS 4534:1998

1 - AS/NZS 4534:1998 ZINC AND ZINC/ALUMINIUM-ALLOY COATINGS ON STEEL WIRE
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE
6 - 2 REFERENCED DOCUMENTS
7 - 3 DEFINITIONS
7 - 3.1 Coating class
7 - 3.2 Coating mass
7 - 3.3 Galvanized coating
7 - 3.4 Hot-dip coating
7 - 3.5 Wire
7 - 3.6 Zinc coating
7 - 3.7 Zinc/aluminium-alloy coating
7 - 4 DESIGNATION
7 - 4.1 General
8 - 4.2 Designation of coating class
8 - 4.3 Designation of coating type and material
8 - 5 WIRE MANUFACTURING PROCESS
8 - 5.1 Continuous coating process
8 - 5.1.1 Raw materials
8 - 5.1.2 Precautions
8 - 5.2 Drawing or rolling process
8 - 5.3 Supplementary non-metallic coatings
9 - 6 APPEARANCE
9 - 7 SELECTION OF TEST SPECIMENS FOR COATING MASS AND COATING ADHERENCE TESTS
9 - 7.1 General
9 - 7.2 Coating mass
9 - 7.3 Adherence of coating
9 - 8 TEST METHOD AND REQUIREMENTS FOR COATING MASS
10 - 9 TEST METHOD AND REQUIREMENTS FOR COATING ADHERENCE
11 - 10 CORROSION RESISTANCE
11 - 11 ROUNDING OF TEST RESULT VALUES
12 - 12 MARKING
13 - APPENDIX A - PURCHASING GUIDELINES
13 - A1 GENERAL
13 - A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
14 - APPENDIX B - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
14 - B1 SCOPE
14 - B2 STATISTICAL SAMPLING
14 - B3 PRODUCT CERTIFICATION
14 - B4 SUPPLIER’S QUALITY SYSTEM
15 - B5 OTHER MEANS OF ASSESSMENT
15 - B5.1 General
15 - B5.2 Sampling and testing for coating mass and coating adherence
15 - B5.3 Compliance
15 - B5.4 Retests
16 - APPENDIX C - CHANGES IN MECHANICAL PROPERTIES CAUSED BY AGEING OR HYDROGEN EMBRITTLEMENT
16 - APPENDIX D - TRANSPORT AND STORAGE OF ZINC- COATED OR ZINC/ALUMINIUM ALLOY-COATED WIRES
17 - APPENDIX E - DETERMINATION OF COATING MASS
17 - E1 GENERAL
17 - E2 GRAVIMETRIC DETERMINATION
17 - E2.1 Principle
17 - E2.2 Stripping solution
17 - E2.3 Test piece
17 - E2.4 Procedure
18 - E2.5 Calculation of coating mass
18 - E3 VOLUMETRIC DETERMINATION
18 - E3.1 Principle
19 - E3.2 Stripping solution
19 - E3.3 Apparatus
20 - E3.4 Test pieces
21 - E3.5 Procedure
21 - E3.6 Calculation of coating mass
22 - E3.7 Correction for temperature and barometric pressure
22 - E4 NON-DESTRUCTIVE DETERMINATION
22 - E5 TEST REPORT
23 - APPENDIX F - GUIDELINES ON COATING SELECTION FOR CORROSION PROTECTION OF STEEL WIRE
23 - F1 GENERAL
23 - F2 EXTERNAL ATMOSPHERIC CORROSIVITY CLASSIFICATIONS
24 - F3 EXTERNAL ATMOSPHERIC CORROSIVITY FACTORS
25 - F4 LOCAL ENVIRONMENT EFFECTS
26 - F5 ESTIMATIONS OF COATING DURABILITY
26 - F5.1 External atmospheric conditions
27 - F5.2 Sea water immersion

Specifies requirements for mass, quality and testing of zinc coatings and zinc/aluminium-alloy coatings on steel wire of circular or non-circular cross-section. The coatings are applied using a continuous process which may compromise immersion in molten metal or electrodeposition. The Standard applies to coatings on wire at its final size and specifies six coating mass classes. It specifies methods for the determination of coating mass and gives advice on the transport and storage of coated wires, and on coating selection for corrosion protection.

This Standard specifies requirements for the mass, quality and testing of zinc coatings and zinc/aluminium-alloy coatings on steel wire of circular or non-circular (shaped) cross-section. The coatings are applied in a continuous process and may be formed either by the application of molten metal or by electrodeposition. Six coating mass classes are covered.This Standard applies to coatings on wire at its final size, whether or not the coating has been applied after final cold working, prior to cold working, or at an intermediate stage of cold working.Matters not relating to the coating itself are outside the scope of this Standard.This Standard does not apply to coatings on articles that have been fabricated from uncoated steel wire and which have subsequently been coated with zinc or zinc/aluminium alloy, except where the coating has been applied in a specialized continuous process (e.g. for wire netting) as opposed to batch treatment (e.g. for nails).NOTES:1 Advice and recommendations on information to be supplied by the purchaser at the time of enquiry or order are contained in Appendix A.2 Coatings in accordance with this Standard may not be available in every combination of wire size, coating mass class and coating type. Reference should be made to appropriate Australian Standards for the types of wire involved.3 Means for determining compliance with this Standard are given in Appendix B.4 Except as stated in this Clause, requirements for zinc coatings on manufactured wire articles, which have been electroplated following fabrication, are given in AS 1789.5 This Standard does not specify the Preece test for coating uniformity. If this test is required, arrangements should be made between the purchaser and the supplier.

First published in Australia in part as part of AS K53.1-1934.
AS K53.2 first published in part 1935.
AS K53.1-1934 and AS K53.2-1935 revised, amalgamated and redesignated AS K53-1942.
Second edition 1960.
Revised and redesignated AS 1650-1974.
Second edition 1981.
Third edition 1989.
Jointly revised and redesignated in part as AS/NZS 4534:1998.