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AS/NZS 2312:1994

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Guide to the protection of iron and steel against exterior atmospheric corrosion
Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Superseded date

06-30-2017

Language(s)

English

Published date

01-01-1994

Preview

1 - AS/NZS 2312:1994 GUIDE TO THE PROTECTION OF IRON AND STEEL AGAINST EXTERIOR ATMOSPHERIC CORROSION
4 - PREFACE
5 - CONTENTS
8 - FOREWORD
9 - SECTION 1 SCOPE AND GENERAL
9 - 1.1 SCOPE
9 - 1.2 REFERENCED DOCUMENTS
12 - 1.3 DEFINITIONS
12 - 1.4 DESIGNATION OF PROTECTION SYSTEMS
13 - SECTION 2 ATMOSPHERIC ENVIRONMENTS
13 - 2.1 GENERAL
13 - 2.2 ATMOSPHERIC CLASSIFICATIONS (APPLICABLE TO STEEL)
15 - SECTION 3 CORROSION PROTECTION SYSTEMS
15 - 3.1 GENERAL
15 - 3.2 RECOMMENDED COATING SYSTEMS
17 - SECTION 4 PLANNING AND DESIGN FOR CORROSION PROTECTION
17 - 4.1 GENERAL
17 - 4.2 PLANNING
18 - 4.3 DESIGN
18 - 4.3.1 General
19 - 4.3.2 Exposure environment
19 - 4.3.3 Materials of construction
21 - 4.3.4 Major design considerations
22 - 4.3.5 General design considerations
31 - SECTION 5 SURFACE PREPARATION TREATMENTS
31 - 5.1 GENERAL
31 - 5.2 CLEANING WITH SOLVENTS OR ALKALINE SOLUTIONS
32 - 5.3 CLEANING AND PREPARATION USING ACID SOLUTIONS (NON-IMMERSION)
32 - 5.4 ABRASIVE BLAST CLEANING
33 - 5.5 PICKLING
33 - 5.6 PHOSPHATE CONVERSION COATINGS
34 - 5.7 FLAME CLEANING
34 - 5.8 POWER TOOL CLEANING
35 - 5.9 HAND TOOL CLEANING
35 - 5.10 THE REMOVALOF SOLUBLE SALTS
35 - 5.11 THE PROTECTION OF STEEL DURING EXTENDED FABRICATION
36 - 5.12 RUST CONVERSION
37 - SECTION 6 METALLIC COATINGS FOR CORROSION PROTECTION
37 - 6.1 GENERAL
37 - 6.2 HOT-DIP GALVANIZED COATINGS
37 - 6.2.1 General
37 - 6.2.2 Bath sizes
37 - 6.2.3 Design for galvanizing
38 - 6.2.4 Galvanizing process
38 - 6.2.5 Application
39 - 6.2.6 Designations for galvanized coating systems
39 - 6.3 METAL SPRAY COATINGS
39 - 6.3.1 General
39 - 6.3.2 Application
39 - 6.3.3 Sealing
39 - 6.3.4 Composite metal spray / sealer / paint systems
40 - 6.3.5 Designations for metal sprayed and composite coating systems
40 - 6.4 ELECTROPLATED COATINGS
41 - 6.5 THE USE OF ROOFING AND CLADDING MATERIALS
42 - SECTION 7 COATING SYSTEMS FOR CORROSION PROTECTION
42 - 7.1 GENERAL
42 - 7.2 DESIGN CONSIDERATIONS
43 - 7.3 COATING SYSTEM DETAILS
43 - 7.4 SELECTION OFCOLOUR
44 - 7.5 HEAT-RESISTING COATINGS
44 - 7.6 POWDER COATINGS
44 - 7.7 PAINTING STAINLESS STEEL
57 - SECTION 8 PAINTING AND PAINT APPLICATION METHODS
57 - 8.1 GENERAL
57 - 8.2 TYPE OF PAINT
57 - 8.2.1 General
57 - 8.2.2 Mixing and thinning
57 - 8.3 TYPE AND CONDITION OF THE SUBSTRATE
57 - 8.4 ATMOSPHERIC CONDITIONS
58 - 8.5 SEQUENCE OF OPERATIONS
58 - 8.6 METHODS OF APPLICATION
58 - 8.6.1 Spray methods
59 - 8.6.2 Brush application
59 - 8.6.3 Roller application
59 - 8.7 STANDARD OF WORKMANSHIP
60 - 8.8 TIME REQUIREMENTS
60 - 8.8.1 Cleaned surfaces
60 - 8.8.2 Period between coats
60 - 8.8.3 Effects of delays during painting
60 - 8.8.4 Drying time before handling
60 - 8.9 PAINT SPREADING RATE AND THICKNESS
61 - 8.10 PAINT STORAGE
61 - 8.10.1 General
61 - 8.10.2 Shelf life
61 - 8.10.3 Pot life
61 - 8.10.4 Straining
63 - SECTION 9 WRAPPING TAPES FOR CORROSION PROTECTION
63 - 9.1 GENERAL
63 - 9.2 TAPE SYSTEMS
64 - SECTION 10 MAINTENANCE OF PROTECTIVE COATING SYSTEMS
64 - 10.1 GENERAL
64 - 10.2 CRITERIA FOR ASSESSING WHEN TO PAINT OR REPAIR
65 - 10.3 PRETREATMENT BEFORE REPAINTING
65 - 10.3.1 General
65 - 10.3.2 Condition of existing coating system
65 - 10.3.3 Surface contamination
65 - 10.3.4 Environmental protection
66 - 10.3.5 Methods
68 - 10.4 REPAINTING
68 - 10.4.1 General
69 - 10.4.2 Procedure
69 - 10.4.3 Records
70 - 10.5 REPAIRS AND REPAINTING OF WELDED STRUCTURES
71 - SECTION 11 INSPECTION AND TESTING
71 - 11.1 SCOPE
71 - 11.2 AUTHORITY
71 - 11.3 PRELIMINARY DISCUSSIONS
72 - 11.4 DUTIES OF INSPECTORS
72 - 11.4.1 Inspection of paint coatings
74 - 11.4.2 Inspection of metallic coatings
74 - 11.5 FINAL INSPECTION
74 - 11.6 RECORDS AND INSPECTION REPORT
74 - 11.7 GUIDANCE ON THE USE OF THICKNESS GAUGES
74 - 11.7.1 Dry film thickness gauges - non-destructive
74 - 11.7.2 Dry film thickness gauges - destructive
75 - SECTION 12 PREPARATION OF COATING SPECIFICATIONS
75 - 12.1 GENERAL
75 - 12.2 CONTENT OF A SPECIFICATION
75 - 12.2.1 Scope of work
75 - 12.2.2 Surface preparation
76 - 12.2.3 Coating system
76 - 12.2.4 Coating materials - detailed stipulations
77 - 12.2.5 Application of coatings
77 - 12.2.6 Transport arrangements
78 - 12.2.7 Repair of welds and damaged areas
78 - 12.2.8 Inspection procedure requirements
79 - 12.2.9 Warranties
80 - SECTION 13 HEALTH AND SAFETY
80 - 13.1 GENERAL
80 - 13.2 THE PAINTED SURFACE
80 - 13.3 FLAMMABILITY
80 - 13.4 EYE PROTECTION
80 - 13.5 RESPIRATORS
80 - 13.6 NOISE
80 - 13.7 HANDLING
81 - 13.8 WORKING IN A CONFINED SPACE
81 - 13.9 SURFACE PREPARATION
81 - 13.10 APPLICATION OF PAINT
82 - 13.11 STORAGE OF PAINT
82 - 13.12 WELDING
82 - 13.13 BURNING OF PAINTED SURFACES
83 - APPENDIX A - GUIDANCE ON THE USE OF THIS STANDARD
83 - A1 GENERAL
83 - A2 CHECK LIST FOR THE COATING OF NEW STRUCTURES
85 - A3 CHECK LIST FOR THE MAINTENANCE PAINTING OF EXISTING STRUCTURES
86 - A4 EXAMPLES OF THE USE OF THIS STANDARD
88 - APPENDIX B - ADVICE ON ATMOSPHERIC CORROSION OF STEEL IN AUSTRALASIAN CLIMATES
92 - APPENDIX C - DESCRIPTION OF PAINT TYPES
92 - C1 SCOPE
99 - APPENDIX D - ECONOMICS OF CORROSION PROTECTION
99 - D1 GENERAL
99 - D2 INITIAL COSTS AND ECONOMICS OF PROTECTIVE TREATMENTS
99 - D2.1 Surface preparation
100 - D2.2 Paint application
100 - D2.3 Galvanizing
100 - D2.4 Inspection
100 - D2.5 Paint coverage
103 - D3 ECONOMIC EVALUATION OF PROTECTIVE TREATMENTS
103 - D3.1 General
103 - D3.2 A simple method of economic evaluation
103 - D3.3 Present-value method
104 - D3.4 Equivalent-annual-cost method
104 - D3.5 Final evaluation

Gives general and specific information on coating systems for the short-, medium-, and long-term protection of structural steelwork. The following aspects are covered in detail: atmospheric environments, planning and design, surface preparation treatments, metallic and paint coatings, maintenance of coating systems, inspection and testing, and preparation of coating specifications. The Standard contains comprehensive details of modern paint systems, including properties and typical applications, and gives advice on the selection of appropriate coating systems.

This Standard provides guidelines for the selection and specification of coating systems for the protection of iron and steel against exterior atmospheric corrosion. The Standard specifically covers the following subjects:(a) Guidance on the use of the Standard.(b) Atmospheric environments and their classification.(c) Corrosion protection system options.(d) Planning and design for corrosion protection.(e) Surface preparation treatments.(f) Metallic coatings.(g) Paint coating systems and methods of paint application.(h) Wrapping tapes for corrosion protection.(i) Maintenance of protective coating systems.(j) Inspection and testing.(k) Guidance on the preparation of coating specifications.(l) Health and safety requirements.(m) Economics of corrosion protection.This Standard covers the protection of structural steelwork against exterior atmospheric corrosion and also the protection of items of equipment manufactured from steel which are exposed to exterior atmospheric conditions.The Standard does not apply to the protection of steelwork which is completely immersed in water or soil, or which is subject to atmospheres severely contaminated with acidic or other chemical vapours such as may be encountered in some chemical manufacturing plants, or to the protection of ships. Protective systems for such exposures may require additional systems dependent upon the nature of the environment.The systems recommended in this Standard can also be used on internal structures where wet or damp areas exist. Where internal steel structures are to be painted for aesthetic reasons, and the environment is not aggressive, reference should be made to AS 2311 or NZS 7703 for appropriate painting systems.NOTE: Guidance on the use of this Standard is given in Appendix A.

Committee
MT-014
DocumentType
Standard
ISBN
0 7262 9047 5
Pages
99
PublisherName
Standards Australia
Status
Superseded
SupersededBy
Supersedes

Under Revision see DR 00258 First published in Australia as AS 2312-1980.Second edition 1984.Jointly revised and designated as Joint Standard AS/NZS 2312:1994. First published in Australia as AS 2312-1980. Second edition 1984. Jointly revised and designated as Joint Standard AS/NZS 2312:1994.

AS 3000-1986 Electrical installations - Buildings, structures and premises (known as the SAA Wiring Rules)
AS 4100-1990 Steel structures
AS 2105-1992 Inorganic zinc silicate paint
AS 2673-1983 Paints for steel structures - Alkyd/micaceous iron oxide
AS 1580.408.4-1993 Paints and related materials - Methods of test Adhesion (cross-cut)
AS 3679.2-1991 Structural steel - Welded sections
AS 2364-1990 Paints for steel structures - High-build epoxy (two-pack)
AS 3678-1990 Structural steel - Hot-rolled plates, floorplates and slabs
AS 1594-1989 Hot-rolled steel flat products
AS 1790-1984 Electroplated coatings - Cadmium on iron or steel
AS 1580.408.2-1993 Paints and related materials - Methods of test Adhesion - Knife test
AS 2865-1995 Safe working in a confined space
AS 1210-1989 Unfired Pressure Vessels (known as the SAA Unfired Pressure Vessels Code)
AS 1627.7-1988 Metal finishing - Preparation and pretreatment of surfaces - Hand tool cleaning of metal surfaces
AS 2603-1983 Paints for steel structures - Full gloss epoxy (two-pack)
AS 1269-1989 Acoustics - Hearing conservation
AS 3894.4-1993 Site testing of protective coatings - Assessment of degree of cure
AS 2310-1980 Glossary of paint and painting terms
AS 1897-1976 Electroplated coatings on threaded components (metric coarse series)
AS 1318-1985 Use of colour for the marking of physical hazards and the identification of certain equipment in industry (known as the SAA Industrial Safety Colour Code)
AS 1627.5-1994 Metal finishing - Preparation and pretreatment of surfaces - Pickling, descaling and oxide removal
AS 1336-1982 Recommended practices for eye protection in the industrial environment
AS 2728-1984 Prepainted and organic film/metal laminate products - Performance requirements for interior/exterior applications in buildings
AS 3886-1991 Paints for steel structures - Vinyl paint - High-build
AS 4036-1992 Corrosion of metal - Dissimilar metals in contact in seawater
AS 2674-1983 Paints for steel structures - Epoxy primer (two-pack)
AS 2837-1986 Wrought alloy steels - Stainless steel bars and semi-finished products
AS 3597-1993 Structural and pressure vessel steel - Quenched and tempered plate
AS 1715-1982 Selection, use and maintenance of respiratory protective devices
AS 3679.1-1990 Structural steel - Hot-rolled bars and sections
AS 3894.10-1993 Site testing of protective coatings Inspection report - Daily
AS 2832.1-1985 Guide to the cathodic protection of metals - Pipes, cables and ducts
AS 1789-1984 Electroplated coatings - Zinc on iron or steel
AS 1580.108.2-1993 Paints and related materials - Methods of test Dry film thickness - Paint inspection gauge
AS 1716-1984 Respiratory protective devices
AS 4025.1-1992 Paints for equipment including ships Solvent-borne - Interior and exterior - Full gloss enamel
AS 3884-1991 Etch primers (single pack and two-pack) for pretreating metal surfaces
AS 2672-1983 Paints for steel structures - Chlorinated rubber, high build
AS 1627.2-1989 Metal finishing - Preparation and pretreatment of surfaces - Power tool cleaning
AS 3600-1994 Concrete structures
AS 2700-1996 Colour Standards for general purposes - Swatches
AS 3885-1991 Paints for steel structures - Galvanized and zinc primed - Latex
AS 2602-1983 Paints for steel structures - Full gloss polyurethane (two-pack)
AS 3887-1991 Paints for steel structures - Coal tar epoxy (two-pack)
AS 1627.6-1994 Metal finishing - Preparation and pretreatment of surfaces - Chemical conversion treatment of metals
AS 1627.9-1989 Metal finishing - Preparation and pretreatment of surfaces - Pictorial surface preparation standards for painting steel surfaces
AS 1627.4-1989 Metal finishing - Preparation and pretreatment of sufaces - Abrasive blast cleaning
AS 1319-1994 Safety signs for the occupational environment (Reconfirmed 2018)
AS 2311-1992 The painting of buildings
AS 1627.1-1989 Metal finishing - Preparation and pretreatment of surfaces - Cleaning using liquid solvents and alkaline solutions
AS 1627.3-1988 Metal finishing - Preparation and pretreatment of surfaces - Flame descaling
AS 1595-1981 Cold-rolled unalloyed low carbon steel sheet and strip
AS 1580.102.1-1992 Paints and related materials - Methods of test Sampling procedure
AS 3894.12-1993 Site testing of protective coatings Inspection report - Coating
AS 3730.14-1991 Guide to the properties of paints for buildings Undercoat - Solvent-borne - Interior/exterior
AS 1445-1986 Hot-dipped zinc-coated or aluminium/zinc-coated steel sheet - 76 mm pitch corrugated
AS 3894.3-1993 Site testing of protective coatings - Determination of dry film thickness
AS 1580.481.0-1991 Paints and related materials - Methods of test Coatings - Guide to assessing paint systems exposed to weathering conditions
AS 1650-1989 Hot-dipped galvanized coatings on ferrous articles
AS 1627.0-1997 Metal finishing - Preparation and pretreatment of surfaces Method selection guide (Reconfirmed 2017)
AS 2990-1987 Quality systems for engineering and construction projects
AS 4089-1993 Priming paint for steel - Single component - General purpose
AS 1345-1995 Identification of the contents of pipes, conduits and ducts (Reconfirmed 2018)
AS 1791-1986 Chromate conversion coatings - Zinc and cadmium
AS/NZS 1338.1:1992 Filters for eye protectors Filters for protection against radiation generated in welding and allied operations
AS 1397-1993 Steel sheet and strip - Hot-dipped zinc-coated or aluminium/zinc-coated
AS 1627.10-1980 Metal finishing - Preparation and pretreatment of metal surfaces prior to protective coating - Cleaning and preparation of metal surfaces using acid solutions (non-immersion)
AS 1270-1988 Acoustics - Hearing protectors
AS 1580.481.1.9-1991 Paints and related materials - Methods of test Coatings - Exposed to weathering - Degree of blistering
AS 1548-1995 Steel plates for pressure equipment
AS 3978-1991 Non-destructive testing - Visual inspection of metal products and components
AS 2204-1978 Zinc-rich organic priming paint
AS 1449-1994 Wrought alloy steels - Stainless and heat-resisting steel plate, sheet and strip
AS 1214-1983 Hot-dip galvanized coatings on threaded fasteners (ISO metric coarse thread series)
AS 3894.11-1993 Site testing of protective coatings - Equipment report
AS/NZS 1337:1992 Eye protectors for industrial applications

AS/NZS 3750.15:1998 Paints for steel structures Inorganic zinc silicate paint (Reconfirmed 2013)
AS 3750.18-2002 Paints for steel structures Moisture cure urethane (single-pack) systems
AS/NZS 4676:2000 Structural design requirements for utility services poles
AS/NZS 3894.7:1996 Site testing of protective coatings Determination of surface temperature
AS 6002-1999 Domestic electric meter enclosures
AS 4751(INT)-2000 Electrogalvanized (zinc) coatings on ferrous open sections
AS 2159-1995 Piling - Design and installation
AS 1627.0-1997 Metal finishing - Preparation and pretreatment of surfaces Method selection guide (Reconfirmed 2017)
AS/NZS 1580.457.1:1996 Paints and related materials - Methods of test Resistance to natural weathering (Reconfirmed 2013)
AS/NZS 4389:1996 Safety mesh
AS 2423-2002 Coated steel wire fencing products for terrestrial, aquatic and general use (Reconfirmed 2021)
AS/NZS 4600:1996 Cold-formed steel structures
AS 4750(INT)-2000 Electrogalvanized (zinc) coatings on ferrous hollow sections
HB 39-1997 Installation code for metal roof and wall cladding
AS/NZS 3750.13:1997 Paints for steel structures Epoxy primer (two-pack)
AS 3700-1998 Masonry structures
AS/NZS 4740:2000 Natural ventilators - Classification and performance (Reconfirmed 2016)
AS/NZS 4792:1999 Hot-dip galvanized (zinc) coatings on ferrous hollow sections, applied by a continuous or a specialized process
AS/NZS 1892.1:1996 Portable ladders Metal
AS 3894.7-2002 Site testing of protective coatings Determination of surface temperature (Reconfirmed 2013)
AS/NZS 3750.11:1996 Paints for steel structures - Chlorinated rubber - High-build and gloss
AS/NZS 3788:1996 Pressure equipment - In-service inspection
AS 3700-2001 Masonry structures
AS/NZS 4791:1999 Hot-dip galvanized (zinc) coatings on ferrous open sections, applied by an in-line process
AS/NZS 2699.3:2000 Built-in components for masonry construction Lintels and shelf angles (durability requirements)
AS/NZS 2728:1997 Prefinished/prepainted sheet metal products for interior/exterior building applications - Performance requirements
AS/NZS 3750.14:1997 Paints for steel structures High-build epoxy (two-pack)
AS 3894.3-2002 Site testing of protective coatings Determination of dry film thickness (Reconfirmed 2013)
AS/NZS 1562.3:1996 Design and installation of sheet roof and wall cladding Plastic
AS/NZS 3750.12:1996 Paints for steel structures Alkyd/micaceous iron oxide (Reconfirmed 2013)
AS/NZS 2699.3:2002 Built-in components for masonry construction Lintels and shelf angles (durability requirements)
AS/NZS 2699.2:2000 Built-in components for masonry construction Connectors and accessories
AS/NZS 3500.5:2000 National Plumbing and Drainage - Domestic installations
AS 1720.1-1997 Timber structures Design methods
AS 1210-1997 Pressure vessels
AS/NZS 3750.16:1998 Paints for steel structures Waterborne primer and paint for galvanized, zinc/aluminium alloy-coated and zinc-primed steel (Reconfirmed 2013)
AS/NZS 4534:1998 Zinc and zinc/aluminium-alloy coatings on steel wire
AS/NZS 2699.1:2000 Built-in components for masonry construction Wall ties
AS/NZS 2785:2000 Suspended ceilings - Design and installation
AS/NZS 4680:1999 Hot-dip galvanized (zinc) coatings on fabricated ferrous articles
AS/NZS 2041:1998 Buried corrugated metal structures
AS/NZS 2311:2000 Guide to the painting of buildings
AS 3566.2-2002 Self-drilling screws for the building and construction industries - Corrosion resistance requirements
AS/NZS 3500.3.2:1998 National plumbing and drainage Stormwater drainage - Acceptable solutions

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