AS/NZS 4791:1999
Hot-dip galvanized (zinc) coatings on ferrous open sections, applied by an in-line process
Specifies requirements for the mass, quality and testing of galvanized coatings applied to ferrous open sections on all surfaces, except cut ends, using an in-line process that utilizes specialized equipment. Appendices give corrosion information, advice on transport and storage of galvanized products, requirements for the renovation of uncoated areas and methods for the determination of coating mass and local thickness.
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AS/NZS 4791:1999 HOT-DIP GALVANIZED (ZINC) COATINGS ON FERROUS OPEN SECTIONS, APPLIED BY AN IN-LINE PROCESS
PREFACE
CONTENTS
1 SCOPE
2 REFERENCED DOCUMENTS
3 DEFINITIONS
3.1 Coating mass
3.2 Coating thickness
3.3 Coating thickness, local
3.4 Galvanizer
3.5 Hot-dip galvanized coating
3.6 Hot-dip galvanizing
3.7 In-line hot-dip galvanizing
3.8 Open section
3.9 Reference area
3.10 Significant surface
3.11 Supplier
4 GALVANIZING PROCESS
4.1 Pretreatment
4.2 Bath composition
4.3 Galvanizing
4.4 Treatment after galvanizing
5 APPEARANCE AND FREEDOM FROM DEFECTS
6 DESIGNATION
7 SELECTION OF TEST SPECIMENS
7.1 For coating mass or thickness determinations
7.2 For adherence of the coating
8 COATING MASS AND THICKNESS
8.1 Coating mass
8.2 Coating thickness
9 ADHERENCE OF COATING
APPENDIX A - PURCHASING GUIDELINES
A1 GENERAL
A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
APPENDIX B - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
B1 SCOPE
B2 STATISTICAL SAMPLING
B3 PRODUCT CERTIFICATION
B4 SUPPLIER'S QUALITY SYSTEM
B5 OTHER MEANS OF ASSESSMENT
APPENDIX C - GENERAL INFORMATION ON FACTORS THAT AFFECT THE CORROSION OF GALVANIZED STEEL
C1 SCOPE
C2 EXTERNAL ATMOSPHERIC CORROSIVITY FACTORS
C3 LOCAL ENVIRONMENT EFFECTS
C4 SEAWATER IMMERSION
APPENDIX D - RENOVATION OF DAMAGED AREAS
D1 EXTENT OF REPAIRABLE DAMAGED AREAS
D2 REPAIR REQUIREMENTS
APPENDIX E - TRANSPORT AND STORAGE OF GALVANIZED OPEN SECTIONS
APPENDIX F - DETERMINATION OF COATING MASS AND LOCAL THICKNESS
F1 GENERAL
F2 GRAVIMETRIC METHOD
F2.1 Method
F2.2 Calculation of coating mass
F3 VOLUMETRIC METHOD
F3.1 Method
F3.2 Calculation of coating mass
F4 MAGNETIC, MAGNETIC INDUCTION AND EDDY CURRENT METHODS FOR LOCAL THICKNESS
F4.1 General
F4.2 Calculation of coating mass
F5 TEST REPORT
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AS/NZS 4791:1999 HOT-DIP GALVANIZED (ZINC) COATINGS ON FERROUS OPEN SECTIONS, APPLIED BY AN IN-LINE PROCESS
PREFACE
CONTENTS
1 SCOPE
2 REFERENCED DOCUMENTS
3 DEFINITIONS
3.1 Coating mass
3.2 Coating thickness
3.3 Coating thickness, local
3.4 Galvanizer
3.5 Hot-dip galvanized coating
3.6 Hot-dip galvanizing
3.7 In-line hot-dip galvanizing
3.8 Open section
3.9 Reference area
3.10 Significant surface
3.11 Supplier
4 GALVANIZING PROCESS
4.1 Pretreatment
4.2 Bath composition
4.3 Galvanizing
4.4 Treatment after galvanizing
5 APPEARANCE AND FREEDOM FROM DEFECTS
6 DESIGNATION
7 SELECTION OF TEST SPECIMENS
7.1 For coating mass or thickness determinations
7.2 For adherence of the coating
8 COATING MASS AND THICKNESS
8.1 Coating mass
8.2 Coating thickness
9 ADHERENCE OF COATING
APPENDIX A - PURCHASING GUIDELINES
A1 GENERAL
A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
APPENDIX B - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
B1 SCOPE
B2 STATISTICAL SAMPLING
B3 PRODUCT CERTIFICATION
B4 SUPPLIER'S QUALITY SYSTEM
B5 OTHER MEANS OF ASSESSMENT
APPENDIX C - GENERAL INFORMATION ON FACTORS THAT AFFECT THE CORROSION OF GALVANIZED STEEL
C1 SCOPE
C2 EXTERNAL ATMOSPHERIC CORROSIVITY FACTORS
C3 LOCAL ENVIRONMENT EFFECTS
C4 SEAWATER IMMERSION
APPENDIX D - RENOVATION OF DAMAGED AREAS
D1 EXTENT OF REPAIRABLE DAMAGED AREAS
D2 REPAIR REQUIREMENTS
APPENDIX E - TRANSPORT AND STORAGE OF GALVANIZED OPEN SECTIONS
APPENDIX F - DETERMINATION OF COATING MASS AND LOCAL THICKNESS
F1 GENERAL
F2 GRAVIMETRIC METHOD
F2.1 Method
F2.2 Calculation of coating mass
F3 VOLUMETRIC METHOD
F3.1 Method
F3.2 Calculation of coating mass
F4 MAGNETIC, MAGNETIC INDUCTION AND EDDY CURRENT METHODS FOR LOCAL THICKNESS
F4.1 General
F4.2 Calculation of coating mass
F5 TEST REPORT
AS/NZS 4791:1999
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.