Standard
UPDATE AVAILABLE
AS 4312-2008
[Superseded]Atmospheric corrosivity zones in Australia
AS 4312-2008 provides guidelines for the classification of corrosivity zones in Australia
and their effect on the corrosion of steel and other metals.
Published: 19/02/2008
Pages: 30
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
PREFACE
1 SCOPE AND GENERAL
1.1 SCOPE
1.2 APPLICATION
1.3 REFERENCED DOCUMENTS
1.4 DEFINITIONS
2 FACTORS AFFECTING CORROSION OF METALS
2.1 GENERAL
2.2 MACRO-CLIMATIC FACTORS
2.2.1 Primary factors
2.2.2 Modifying factors
2.3 MICRO-CLIMATIC AND DESIGN FACTORS
2.3.1 General
2.3.2 Industrial pollutants and chemical attacks
2.3.3 Shelter from rain and regular washing
2.3.4 Prolonged surface wetness
2.3.5 Abrasion and erosion
2.3.6 Other factors
2.4 CORROSIVITY CATEGORIES
2.5 ATMOSPHERIC CORROSION—METALS OTHER THAN STEEL
2.5.1 General
2.5.2 Stainless steels
2.5.3 Zinc
2.5.4 Aluminium
2.5.5 Aluminium-zinc alloys
2.5.6 Copper
3 CORROSIVITY ENVIRONMENTS
3.1 GENERAL
3.2 ATMOSPHERIC CORROSIVITY CATEGORIES
3.2.1 C1: Very Low (Mild steel corrosion rate <1.3 µm/y)
3.2.2 C2: Low (Mild steel corrosion rate 1.3 to 25 µm/y)
3.2.3 C3: Medium (Mild steel corrosion rate 25 to 50 µm/y)
3.2.4 C4: High (Mild steel corrosion rate 50 to 80 µm/y)
3.2.5 C5: Very High (C5-I: Industrial, C5-M: Marine) (Mild steel corrosion rate 80 to 200 µm per year)
3.2.6 T: Inland Tropical
4 DETERMINING THE CORROSIVITY ENVIRONMENT
4.1 GENERAL
4.2 DETERMINING THE CORROSIVITY ENVIRONMENT
APPENDIX A
APPENDIX B
APPENDIX C
C1 INTRODUCTION
C2 PUBLISHED PAPERS
APPENDIX D
D1 GENERAL
D2 CORROSIVITY ZONES IN AS/NZS 2312
D3 CORROSIVITY ZONES IN OTHER STANDARDS
D3.1 General
D3.2 AS 1231—2000, Aluminium and aluminium alloys—Anodic oxidation coatings
D3.3 AS/NZS 2699.3:2002, Built-in components for masonry construction—Part 3: Lintels and shelf angles (durability requirements)
D3.4 AS/NZS 2728:1997, Prefinished/prepainted sheet metal products for interior/exterior building applications—Performance requirements—Appendix B
D3.5 AS 2423—2002, Coated steel wire fencing products for terrestrial, aquatic and general use—Appendix C
D3.6 AS 3566.2—2002, Self-drilling screws for the building and construction industries—Part 2: Corrosion resistance requirements
Cited references in this standard
ASTM G92
Standard practice for characterization of atmospheric test sites
AS/NZS 1866
Aluminium and aluminium alloys—Extruded rod, bar, solid and hollow shapes
[Superseded]
Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings
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