Coatings British Standards

British Standards Institution, BS 5493 1977, Code of Practice for protective coatings of iron and steel structures against corrosion. 

Recent experience has confirmed that, by adopting the recommendations of the British Standards Institution or similar codes of practice operating in other countries, the likelihood of corrosion damage to buried structures adjacent to cathodically protected installations is negligible. This is because recently installed cathodically protected structures are usually coated with eflicient and durable insulating coverings such as epoxy resins and the protective current applied is consequently small. In many cases the small protective currents that can be applied by means of galvanic anodes is adequate. 

The hardness and abrasion resistance of anodic coatings have never been easy properties to measure, but the development of a British Standard on hard anodising has made this essential. Film hardness is best measured by making microhardness indents on a cross-section of a film , but a minimum film thickness of 25 tm is required. For abrasion resistance measurements, a test based on a loaded abrasive wheel , which moves backwards and forwards over the film surface, has improved the sensitivity of such measurements. 

Anodic Oxidation Coatings on Aluminium, British Standard 1615 1972... 

Hard Anodic Oxide Coatings on Aluminium for Engineering Purposes, British Standard 5599 1978... 

Hot Dip Galvanised Coatings on Iron and Steel Articles, BS 729 1971 (1986), British Standards Institution, London (1986)... 

The Gehman test is also standardised in BS903 Part A1318 and ASTM D105319. The British Standard is identical to the international method but the ASTM has a rather different layout as it covers coated fabrics as well as rubbers and a single point procedure is added for routine inspection. It only specifies a step temperature change procedure. 

British Standard 4601 1970, Electroplated coatings of nickel plus chromium on plastics materials . 

AG (now Datacolor International) software. Finally, the Colour Measurement Committee (CMC) of the Society of Dyers and Colourists in the United Kingdom made some compromises and published a formula based on the J P Coates work but incorporating the CIELAB coordinates [53], This was made a British standard (BS 6923) and soon was adopted by textile associations around the world. The usefulness of such an equation has been demonstrated many times in the textile industry and in some papers from manufacturers of textured, molded polypropylene as well. 

Standard test methods that have been trialled, tested and approved by independent committees are the main methods accepted by government purchasing departments, manufacturers and quality assurance systems. Many traditional British Standards have been incorporated into International Standards (ISO) and European Norme (BS EN) standards for use throughout the world. The following list contains some of the important test methods for the chemical analysis of rubbers, plastics and other elastomers used in coated fabrics. 

A great deal of work has been done and is still carried out on the development of environmental tests especially for coatings on glass and plastics for example, US Military specifications, United Kingdom specifications for aircraft equipment, British Standard Institute specifications, German DIN specification, etc. This has already resulted in a number of specifications which are equivalent to the most severe conditions ever likely to be met in both tropical and polar climates. The most often used test specifications are summarized in Table 8a. 

There do not appear to be ISO methods for coated fabrics, but there are national methods that indicate, as one might expect, that dimensional stability is of importance for these materials. There are three British standards one covers stability to water immersion [62] and another to domestic washing [63] the third is more unusual in that it measures the shrinkage of the material after it is unrolled and left unstrained for at least 24 hours [64],... 

There is also a British standard for coated fabrics, BS 3424, Method 31 [32], which uses the same geometries as the plastics method. 

BS EN 1062-3 (1997). Paints and Varnishes - Coating Materials and Coating Systems for Exterior Masonry and Concrete. Part 3 Capillary Absorption and Permeability to water, British Standards Institute, London. 

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