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.

The steel is coated with a powder of enamel heat curing epoxy or a plastic compound that has been treated. Whereas coating system 1 containing polyester powder coating fails after 1200 h of exposure in salt spray chamber astm b117. 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. Powder coating offers excellent resistance to abrasion peeling chipping cracking rust and other types of damage stemming from chemical exposure.

For example a nylon based powder coating can quickly be damaged by exposure to methanol or to oven like temperatures. 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. 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. So there you have it.

So while powder coating is sometimes less expensive than epoxy coating as the saying goes you get what you pay for. For our full line of powder coating supplies you can visit our site here. Powder coating steel won t rust if you prep the area correctly and fully coat and cure the powder. Powder coatings can be incredibly resilient but even the best coatings can take only so much.

It has been used in applications involving steel pipeline coating concrete floor paint and even heat shields for space capsules. Epoxy is a tough and multi purpose material consisting of the cross linking of an epoxy resin and hardener or co reactant. Exposure to the wrong chemicals temperatures and mechanical stress factors can damage a powder coating or wear it away. It offers many benefits for industrial and commercial painting applications.

Epoxy coating is simple to repair. The powder may be a thermoplastic or a thermoset polymer. 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.

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.