Powder Coating Galvanized Sheet Metal

One of the most durable protective coatings for steel is provided by applying a polyester powder coating over hot dip galvanized steel to provide a high grade architectural finish to steel items.

Powder coating galvanized sheet metal.

En 15773 industrial application of powder organic coatings to hot dip galvanized or sheradised steel articles duplex systems specifications recommendations and guidelines provides additional information concerning communication within. Galvanized steel with a powder coated surface. The powder is typically sprayed onto the galvanized surface. We are bidding a project for a department of transportation that specifies application of powder on hot dip galvanized steel.

When paint and galvanized steel are used together the corrosion control provided is superior to either system used alone. Recently we have a requirement of powder coating ral 9006 jotun make on hot dip galvanized tanks of size app 1 5 mtrs x 1 mtr x 1 mtr. One of the most durable protective coatings for steel is provided by applying a polyester powder coating over hot dip galvanized steel to provide a high grade architectural finish to steel items. However astm d7803 includes a pre heating step to drive off air and moisture from the prepared galvanized surface prior to powder coating.

A duplex system is simply painting or powder coating steel that has been hot dip galvanized after fabrication. Even though this standard is specific to powder coating of galvanized steel it contains the same cleaning and preparation techniques for the surfaces coated with liquid products as astm d6386 and sspc sp 16. A good practice is to powder coat a sample piece of galvanized steel to check the overall coating appearance before coating the final piece. Hot dip galvanizing is coating of metallic zinc bonded with steel to form a source of corrosion protection for steel.

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. Cure the powder coating. The galvanized coating protects the base steel supplying cathodic and barrier protection. Apply the powder to the galvanized part in accordance with the manufacturers instructions.

The finished metal powder coating protects both the steel part and the galvanized layer and provides an attractive exterior finish to the part. This process can be difficult to perform properly if quality control procedures are not in place and can result in uneven coating and pinhole spots where the coating does not adhere. The specification also require that the galvanize company and powder coat company provide a minimum 2 year guarantee against failure.