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AS 2312.1:2014
[Current]Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings, Part 1: Paint coatings
Provides guidelines for the selection and specification of paint coating systems for the protection of structural steel work against atmospheric corrosion.
Published: 19/12/2014
Pages: 120
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Need for corrosion protection
1.3 Use of this Standard
1.4 Referenced documents
1.5 Definitions
1.6 Durability considerations
1.7 Warranty considerations
1.8 Designation of protection systems
1.9 Health, safety and environmental protection
2 Classification of environments
2.1 General
2.2 Micro-environments
2.3 Atmospheric corrosivity categories
2.4 Other environments
3 Planning, design and fabrication for corrosion protection
3.1 Scope and general
3.2 Planning
3.3 Design
3.3.1 General
3.3.2 Exposure environment
3.3.3 Materials of construction
3.3.3.1 General
3.3.3.2 Galvanic corrosion
3.3.3.3 Structural and pressure vessel steels
3.3.3.4 Weather-resistant (weathering) steels
3.3.3.5 Stainless steels
3.3.3.6 Cast iron
3.3.3.7 Concrete
3.3.4 Major design considerations
3.3.4.1 General
3.3.4.2 Cavities and crevices
3.3.4.3 Hollow sections
3.3.4.4 Drainage
3.3.4.5 Ventilation
3.3.4.6 Accessibility for coating and maintenance
3.3.4.7 Geometrical considerations
3.3.4.8 Load-bearing members
3.3.4.9 Services
3.3.4.10 Bolts, nuts and washers
3.3.4.11 Surfaces under fasteners
3.3.4.12 Faying surfaces
3.3.4.13 Cathodic protection
3.3.4.14 Sections in contact with soil
3.3.4.15 Sections in contact with porous materials
3.3.4.16 Joint and cavity sealants
3.4 Fabrication
3.4.1 General
3.4.2 Preparation of welds prior to coating
3.4.3 Sharp edges
3.4.4 Shelling and laminations
3.4.5 Gouges or raised nibs
3.4.6 Responsibility for repair of fabrication defects
3.4.7 Rectification procedures
4 Surface preparation
4.1 General
4.2 Surface preparation methods
4.2.1 Treatment of fabrication defects
4.2.2 Cleaning with solvents or alkaline solutions (see AS 1627.1)
4.2.3 Abrasive blast cleaning (see AS 1627.4)
4.2.4 Hand and power tool cleaning (see AS 1627.2)
4.2.5 Water pressure washing and jetting
4.3 Soluble salts
4.4 The protection of steel during extended fabrication
4.5 Rust conversion
5 Factors influencing paint coating selection
5.1 General
5.2 Substrate and surface condition
5.3 Environment
5.4 System life
5.5 Design
5.6 Shop or site application
5.7 Colour and appearance
5.8 Application method
5.9 Conditions during application
5.10 Surface preparation
5.11 Previous experience
5.12 Maintenance considerations
5.13 Inspection requirements
5.14 Safety and environmental constraints
5.15 Cost and warranty considerations
6 Paint coating systems for corrosion protection
6.1 General
6.2 Durability of paint coatings
6.3 Coating systems for atmospheric environments
6.4 Dry film thickness
7 Painting and paint application methods
7.1 General
7.2 Coating contractor qualifications
7.3 Paint storage
7.4 Mixing and thinning of paint
7.5 Type and condition of the substrate
7.6 Painting conditions
7.7 Coating application
7.7.1 General
7.7.2 Pot life
7.7.3 Spray methods
7.7.3.1 General
7.7.3.2 Airless spraying
7.7.3.3 Compressed air spraying
7.7.4 Brush application
7.7.5 Roller application
7.7.6 Post added accelerants
7.8 Standard of workmanship
7.9 Time requirements
7.9.1 Prepared surfaces
7.9.2 Period between coats
7.9.3 Effects of delays during painting
7.9.4 Drying time before handling
7.10 Other aspects of coating application
7.10.1 Paint spreading rate and thickness
7.10.2 Stripe coating
7.10.3 Painting around bolt holes
7.10.4 Repairs to the coating
8 Maintenance of paint coating systems
8.1 General
8.2 Initial inspections and assessment
8.3 Criteria for assessing when to repair
8.4 Surface preparation
8.4.1 General
8.4.2 Condition of existing coating system
8.4.3 Surface contamination
8.4.4 Environmental protection
8.4.5 Methods
8.4.5.1 Abrasive blast cleaning
8.4.5.2 Pressure water cleaning
8.4.5.3 Power tool and hand tool cleaning
8.5 Repainting
8.5.1 General
8.5.2 Procedure
8.5.3 Records
8.6 Repairs and repainting of welded structures
9 Inspection and testing
9.1 General
9.2 Requirements and authority of inspectors
9.3 Level of inspection
9.4 Painting project commencement meeting
9.5 Reference areas
9.6 Inspection requirements
9.6.1 General
9.6.2 Initial inspection
9.6.3 Surface preparation
9.6.4 Paint application
9.6.5 Final inspection
9.7 Records and inspection report
9.8 Guidance on the use of testing equipment
9.8.1 Temperature, relative humidity and dew point
9.8.2 Abrasive cleanliness
9.8.3 Surface cleanliness
9.8.4 Surface profile
9.8.5 Soluble salts
9.8.6 Wet film thickness
9.8.7 Dry film thickness
9.8.8 Film continuity
9.8.9 Degree of cure
9.8.10 Adhesion
10 Preparation of coating specifications
10.1 General
10.2 Content of a specification
10.2.1 Scope of work
10.2.1.1 Areas and items to be coated
10.2.1.2 Schedule for coating
10.2.1.3 Supplies of equipment and paint
10.2.1.4 Regulatory authority requirements
10.2.1.5 Unseen or extra work
10.2.2 Surface preparation
10.2.3 Coating system
10.2.4 Coating materials—detailed stipulations
10.2.5 Application of coatings
10.2.6 Storage, handling and transport arrangements
10.2.7 Repair of welds and damaged areas
10.2.8 Inspection procedure requirements
10.2.9 Warranties
10.2.10 Maintenance painting specifications
Appendix A
A1 General
A2 Check list for the coating of new structures
A3 Check list for the maintenance painting of existing structures
A4 Examples of the use of this Standard
Appendix B
B1 General
B2 Atmospheric environments
B3 Fresh water
B4 Seawater
B5 Soil
B6 Chemical and other specialized environments
B7 High temperature environments
Appendix C
C1 General
C2 Coating systems for non-atmospheric environments
C3 Heat resisting coatings
Appendix D
Appendix E
E1 General
E2 Initial costs and economics of protective treatments
E2.1 Surface preparation
E2.2 Paint application
E2.3 Inspection
E2.4 Paint coverage
E2.4.1 General
E2.4.2 Effect of surface roughness
E2.4.3 Effect of paint application method
E2.4.4 Determination of practical coverage of paint
E3 Economic evaluation of protective treatments
E3.1 General
E3.2 Life cycle costing
E3.3 A simple method of economic evaluation
E3.4 Final evaluation
Appendix F
Appendix G
Appendix H
H1 Powder coatings
H1.1 General
H1.2 Application of powder coatings
H1.3 Surface preparation
H2 Wrapping tapes
Amendment control sheet
AS 2312.1:2014
Amendment no. 1 (2017)
Revised text
Index
Cited references in this standard
AS/NZS 1554
Structural steel welding (series)
[Current]
Site testing of protective coatings, Part 14: Inspection report — Daily painting
Content history
[Current]
[Superseded]
[Superseded]
DR AS/NZS 2312.1
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