BS 5493:1977

Foreword
Code drafting committee
Section one. General
1. Scope
2. References
3. Use of the code
3.1 General
3.2 Use by the experienced specifier
3.3 Use by the non-technical specifier
3.4 Specification requirements
Section two. Factors influencing the choice of
protective systems
4. General
4.1 Recognition of the problems
4.2 Questions related to design, use and site
      requirements
4.3 Questions relating to coating system
5. Environment
5.1 Classification of types
5.2 Identification of relevant types
6. Life required of coating
6.1 Definition
6.2 Categories
6.3 Assessment of life requirement
7. Design of the structure
8. Fabrication
8.1 General
8.2 Faying surfaces of friction-grip joints
8.3 Fasteners
8.4 Procedure for welds
9. Facilities for application of coatings
10. Classification and characteristics of protective
    coatings
10.1 Classification
10.2 Characteristic advantages of metal and paint
      coatings
10.3 Other coatings
10.4 Application facilities
10.5 Effects of delays during application
10.6 Costs
11. Characteristics of metallic coatings
11.1 Zinc coatings (othern than zinc-rich paints)
11.2 Sprayed-metal coatings
11.3 Metal-plus-paint systems
12. Characteristics of paint systems (including metallic
    zinc-rich paints)
12.1 General
12.2 Zinc-rich paints
12.3 Drying-oil-type paints
12.4 One-pack chemical-resistant paints
12.5 Two-pack chemical-resistant paints
12.6 Bituminous coatings
13. Characteristics of some other protective systems
13.1 Powder coatings
13.2 Grease paints
13.3 Wrapping tapes and sleeves
13.4 Protection of steel by cement and allied products
13.5 Cathodic protection
14. Surface preparation
14.1 General
14.2 Degreasing
14.3 Removal of scale and rust
14.4 Attention to detail
Section three. Specifications and technical requirements
15. Introduction
15.1 The scope of this section
15.2 The need for specifications
15.3 The prime function of a Specification
15.4 Responsibilities in preparing a Specification
15.5 The communicative value of a Specification
15.6 Schedules
15.7 Details
15.8 Definition and allocation of responsibilities
16. Surface preparation
16.1 Degreasing
16.2 Removal of rust and scale
17. Coating system
18. Stripe coats
19. Control of thickness of paint coating
20. Control of thickness of metal coating
20.1 Galvanizing
20.2 Sprayed metal
21. Materials
21.1 Availability
21.2 Control of materials
21.3 Preparation for use
22. Application of protective coatings
22.1 General
22.2 Painting
22.3 Galvanizing and metal-spraying
22.4 Wrapping
22.5 Mastics and sealants
23. Working conditions
23.1 General
23.2 Temperature
23.3 Humidity
23.4 External conditions
23.5 Contamination of prepared surfaces and wet film
23.6 Shop conditions
23.7 Lighting
23.8 Hot conditions
23.9 Health and safety
24. Handling, transport, storage and erection
24.1 Selection of coating systems
24.2 Methods of preventing damage
24.3 Storage of coated steelwork
24.4 Responsibilities for preventing damage
25. Treatments for connections and other special areas
25.1 General requirements
25.2 Bolts
25.3 Surfaces of connections joined by bolts
25.4 Welded work
25.5 Clearance for coatings
26. Manhole and joint cover plates, pipe couplings and
    other small items
27. Machined and bearing surfaces
28. Steel in contact with other materials
28.1 Coating system
28.2 Steel embedded in concrete
28.3 Steel in contact with timber
28.4 Steel in contact with other metals
28.5 Steel in contact with or near rain-washed concrete
28.6 Steel near to surfaces subject to treatment with
      road (de-icing) salts
29. Surfaces inaccessible on completion
30. Ancillary equipment
31. Use of desiccants
32. Remedial work
32.1 General
32.2 Defects resulting from unsatisfactory application
32.3 Defects resulting from inferior preparation,
      materials or workmanship
32.4 Early degradation of coatings
32.5 Other remedial measures
33. Specifications for maintenance coatings
33.1 Factors for consideration
33.2 Compatibility of maintenance with original system
33.3 Location of different treatments
33.4 Coating schedule
34. Final check
Section four. Inspection
35. Introduction
36. Duties of the Inspector
37. Levels of inspection
38. Inspection schedule
39. Inspection record and reports
40. Inspection organization
41. Measurement of film thickness
41.1 Methods available
41.2 Procedure
41.3 Calculations
42. Sampling of materials
43. Inspection guide
Section five. Maintenance
44. The need for maintenance
45. Basic considerations of maintenance procedure
46. Factors affecting decisions on maintenance
46.1 Condition of coatings
46.2 Variability of deterioration according to location
46.3 Factors affecting deterioration
46.4 Type and use of structure
47. Factors affecting choice of procedure
47.1 Environment
47.2 Constraints on site
48. Organization
48.1 Labour
48.2 Inspection
48.3 Conduct of work on site
49. Choice of maintenance method
50. Choice of procedures
51. Surface preparation
51.1 General
51.2 Factors appropriate to use of different methods
      on site
52. Application
53. Standards of preparation
54. Standards of application
54.1 General
54.2 Brushing
54.3 Roller-coating
54.4 Spray application
55. Recommendations for coatings
55.1 General
55.2 Previously painted steelwork
55.3 Previously metal-coated steelwork with or without
      additional coating
Section six. Safety and health
56. Legislation
57. Operational hazards
58. General hygiene
Numerous appendices
Numerous tables
Numerous figures
Index

Guidance on how to specify a chosen protective system, how to ensure its correct application and how to maintain it. Does not include specific recommendations for ships, vehicles, offshore platforms, specialized chemical equipment, cladding materials, plastics coatings, cement-mortar linings or weathering steels.

This code classifies recommended methods of protection against corrosion of iron and steel structures exposed to environments commonly encountered. It describes the various methods in detail and gives guidance on how to specify a chosen protective system, how to ensure its correct application, and how it should be maintained.

The code does not include specific recommendations for ships, vehicles, offshore platforms, specialized chemical equipment, or cladding materials; nor does it include detailed recommendations for plastics coatings or cement-mortar linings.

For steel of 5mm thickness or less the recommendations of DD 24 may be preferred.

For some situations, weathering steel may be an alternative to ordinary structural steel with applied coatings. No detailed recommendations on the use of weathering steels are given in this code and when their use is contemplated, advice should be sought from the steel industry.