Steel Epoxy Polyester Powder Coating Rust

Galvanized steel versus powder coatings for outdoor environments thursday april 13 2017 chipping fading and corrosion are common concerns when deliberating over the use of galvanized steel coating or powder coating for outdoor furnishings such as handrails and guardrails bike racks playground equipment and park benches.

Steel epoxy polyester powder coating rust.

Epoxy powder coating is a series of epoxy based powder coating designed to give optimum mechanical properties and exceptional protective qualities on components and fabrications where long term exposure to ultra violet light or exterior weathering is not anticipated. It offers many benefits for industrial and commercial painting applications. Powder coating is a type of coating that is applied as a free flowing dry powder unlike conventional liquid paint which is delivered via an evaporating solvent powder coating is typically applied electrostatically and then cured under heat or with ultraviolet light. But as mentioned above powder coating doesn t cure very well over pre existing rust of coatings and your results may be unsatisfactory.

Although powder coating is not immune to deterioration it is a highly durable coating applies in the uniform fashion keeps its loss in color offers superb uv stability and is more. So there you have it. Epoxy is a tough and multi purpose material consisting of the cross linking of an epoxy resin and hardener or co reactant. So while powder coating is sometimes less expensive than epoxy coating as the saying goes you get what you pay for.

It can be seen that epoxy polyester powder coated sample system 2 is found to have less white rust even after 1608 h of exposure in salt spray chamber astm b 117. Whereas coating system 1 containing polyester powder coating fails after 1200 h of exposure in salt spray chamber astm b117. The powder may be a thermoplastic or a thermoset polymer. The other answers are essentially correct but to clarify powder coating is a 2 step process and the name only refers to the first step.

Exposure to the wrong chemicals temperatures and mechanical stress factors can damage a powder coating or wear it away. Powder coating offers excellent resistance to abrasion peeling chipping cracking rust and other types of damage stemming from chemical exposure. The steel is coated with a powder of enamel heat curing epoxy or a plastic compound that has been treated. This series are available in a wide range of colors with different gloss and texture.

Epoxy coating can fill in pitting and other cosmetic damage for a smoother finish. Powder coatings can be incredibly resilient but even the best coatings can take only so much. The quality and longevity of epoxy coating far outweighs the higher price tag. Epoxy coating is simple to repair.

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