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Technical Resources Area |
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PPA 571 - Longevity | PPA 571 - real examples |
PLASCOAT PPA 571
Coating Longevity
Plascoat has been producing and marketing coating powders for over 40 years and is the world leader in its field. This unparalleled experience is derived from its unique position as both a provider of subcontract thermoplastics grinding and compounding services and as an applicator of a wide variety of coatings to both metal and plastic articles.
Its unrivalled combination of coatings production and application expertise has enabled Plascoat to develop the widest range of thermoplastic metal finishing powders and promote its own range of coating equipment.
PPA 571 is a thermoplastic powder developed specially to achieve long term adhesion to both mild steel and aluminium substrates without the need for an adhesive primer. It is especially recommended where there is a requirement for excellent resistance to ultraviolet light, salt spray and atmospheric pollutants. Whilst not having been specially formulated for use in aggressive chemical environments, or for applications requiring high abrasion resistance, it has proved its suitability for contact with concentrated sulphuric acid (traction battery boxes) and a number of other chemicals.
Since PPA 571 was developed in 1989, PPA 571 has been subjected to thorough laboratory testing, Salt spray to ASTM B117, QUV to ASTM G53-77 and Florida site exposure at 45° from horizontal towards South. The results of these tests have proven PPA 571 to be superior to most, if not all, materials in this price range. From these test results, and by using techniques developed over 40 years, Plascoat is able to estimate that PPA 571 coatings will continue to protect the metal for a minimum period of 30 years outside exposure in northern Europe, 20 years in the south Europe (northern Mediterranean region) and at least 10 years in more tropical areas. Provided that::-
· The PPA 571 is applied in accordance with the conditions outlined on the material data sheet and the PPA 571 processing guide.
· The coating is not in contact with abnormally aggressive chemicals or gases.
· The metal has been appropriately cleaned and is free from sharp corners or edges.
· The coating is continuous and free from exposed edges or pinholes.
· The coating has not been damaged through to bare metal, for example during transport, site erection or subsequent use.
· The metal substrate has not been deformed after coating.
· The article/coating has not been exposed to continuous temperatures in excess of 50°C or prolonged periods over 65°C.
· The coating thickness is a minimum of 170 μ (min 200 μ recommended)
PPA 571 is now used in many countries, including the Middle East and in the Arctic, for the coating of fencing, connectors, cable trays, battery boxes, street furniture etc. In its history not one instance has yet been reported of coating degradation in exterior use, even in the most harsh of environments.
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Plascoat Systems Ltd. Trading Estate, Farnham, Surrey GU9 9NY, UK Tel: +44 (0) 1252 733777, Fax: +44 (0) 1252 721250 email: sales@plascoat.com |
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