AS/NZS 4680:1999

1 - AS/NZS 4680:1999 HOT-DIP GALVANIZED (ZINC) COATINGS ON FABRICATED FERROUS ARTICLES
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE
6 - 2 REFERENCED DOCUMENTS
7 - 3 DEFINITIONS
7 - 3.1 Coating mass
7 - 3.2 Coating mass, average
7 - 3.3 Coating mass, local
7 - 3.4 Coating thickness
7 - 3.5 Coating thickness, average
7 - 3.6 Coating thickness, local
7 - 3.7 Galvanizer
7 - 3.8 Hot-dip galvanized coating
7 - 3.9 Hot-dip galvanizing
7 - 3.10 Reference area
8 - 3.11 Significant surface
8 - 4 DESIGN REQUIREMENTS
8 - 5 BASIS METAL
8 - 6 GALVANIZING PROCESS
8 - 6.1 Pretreatment
8 - 6.2 Bath composition
8 - 6.3 Threaded components
8 - 7 APPEARANCE AND FREEDOM FROM DEFECTS
9 - 8 COATING MASS AND THICKNESS
9 - 8.1 Coating mass
9 - 8.2 Coating thickness
9 - 9 ADHERENCE OF COATING
11 - APPENDIX A - PURCHASING GUIDELINES
11 - A1 GENERAL
11 - A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
12 - APPENDIX B - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
12 - B1 SCOPE
12 - B2 STATISTICAL SAMPLING
12 - B3 PRODUCT CERTIFICATION
12 - B4 SUPPLIER'S QUALITY SYSTEM
13 - B5 OTHER MEANS OF ASSESSMENT
14 - APPENDIX C - RECOMMENDED PROCEDURES FOR THE DESIGN AND PREPARATION OF ARTICLES FOR GALVANIZING
14 - C1 SCOPE
14 - C2 SIZE AND SHAPE
14 - C3 DIMENSIONAL STABILITY
14 - C4 OVERLAPPING OR CONTACTING SURFACES
14 - C5 WELDING
15 - C6 VENTING AND DRAINING
15 - C6.1 General
15 - C6.2 Hollow sections
15 - C7 ASSEMBLIES
15 - C8 MOVABLE PARTS
15 - C9 LABELS AND MARKINGS
15 - C10 HANDLING
15 - C11 CASTINGS
16 - APPENDIX D - PROPERTIES OF THE STEEL TO BE COATED, WHICH CAN AFFECT OR BE AFFECTED BY HOT-DIP GALVANIZING
16 - D1 BASIS METAL
16 - D1.1 Composition
16 - D1.2 Surface condition
16 - D1.3 The influence of the steel surface on the hot-dip galvanized coating thickness
16 - D1.4 Stresses in the basis metal
17 - D2 LARGE OBJECTS OR THICK STEELS
17 - D3 HOT-DIP GALVANIZING PRACTICE
18 - APPENDIX E - RENOVATION OF DAMAGED OR UNCOATED AREAS
18 - E1 EXTENT OF REPAIRABLE DAMAGED OR UNCOATED AREAS
18 - E2 REPAIR REQUIREMENTS
19 - APPENDIX F - TRANSPORT AND STORAGE OF GALVANIZED ARTICLES
20 - APPENDIX G - DETERMINATION OF COATING MASS AND LOCAL THICKNESS
20 - G1 GENERAL
20 - G2 GRAVIMETRIC METHOD
20 - G2.1 Method
20 - G2.2 Calculation of coating mass
20 - G3 VOLUMETRIC METHOD
20 - G3.1 Method
21 - G3.2 Calculation of coating mass
21 - G4 MASS-ON-MASS METHOD
21 - G5 MAGNETIC, MAGNETIC INDUCTION AND EDDY CURRENT METHODS FOR LOCAL THICKNESS
21 - G5.1 General
21 - G5.2 Calculation of coating mass
21 - G6 TEST REPORT
22 - APPENDIX H - GENERAL INFORMATION ON FACTORS THAT AFFECT THE CORROSION OF GALVANIZED STEEL
22 - H1 SCOPE
22 - H2 EXTERNAL ATMOSPHERIC CORROSIVITY FACTORS
22 - H3 LOCAL ENVIRONMENT EFFECTS
23 - H4 SEAWATER IMMERSION
24 - APPENDIX I - INFORMATION ON THE USE OF SWEEP (BRUSH) BLAST CLEANING OF GALVANIZED STEEL PRIOR TO PAINTING
24 - I1 GENERAL
24 - I2 PROCEDURE

Specifies requirements and tests for hot-dip zinc coatings on fabricated ferrous articles including structural steel, steel sheet fabrications, assembled steel products, fabricated tubes, fabricated wire work, steel forgings and stampings, ferrous castings and nails and other small components. Appendices give advice on the design of articles to be galvanized, on the transport and storage of galvanized articles and on general factors affecting the corrosion of the galvanized coating.

This Standard specifies requirements and tests for hot-dip zinc coatings on fabricated ferrous articles including structural steel, steel reinforcements, steel sheet fabrications, assembled steel products, tubular fabrications, fabricated wire work, steel forgings, steel stampings, ferrous castings, nails and other small components.This Standard applies to both centrifuged and non-centrifuged articles.This Standard does not apply to products such as wire and welded wire fabric (see AS/NZS 4534), sheet (see AS 1397) or open sections (see AS/NZS 4791) and tube hot-dip galvanized in continuous, semi-continuous or specialized plants (see AS/NZS 4792).NOTES:1 Advice and recommendations on information to be supplied by the purchaser to the hot-dip galvanizer at the time of enquiry or order are contained in the purchasing guidelines set out in Appendix A.2 Means for demonstrating compliance with this Standard are given in Appendix B.3 After-treatment of hot-dip galvanized articles is not covered by this Standard. Such treatment (if any) should be specified separately by the purchaser.

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 4680:1999.