Powder Coating Galvanized Steel Sheet

Bubble problems powder coating galvanized steel 2004.

Powder coating galvanized steel sheet.

However astm d7803 includes a pre heating step to drive off air and moisture from the prepared galvanized surface prior to powder coating. We are facing problems in powder coating. Check for experience with galvanized as a substrate and see what the powder coater can offer for a warranty. 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.

Polyester powder coating over hot dip galvanized steel provides a high grade architectural finish to steel items with excellent atmospheric weathering characteristics the powder coated product ensures maximum durability for steel components which will generally provide 50 year rust free life spans in most architectural applications. 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. There are certain powder coating companies that have better knowledge of this process and will do a more reliable job of it and some that are not as good.

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. When paint and galvanized steel are used together the corrosion control provided is superior to either system used alone. The finished metal powder coating protects both the steel part and the galvanized layer and provides an attractive exterior finish to the part.

Hot dip galvanizing is coating of metallic zinc bonded with steel to form a source of corrosion protection for steel. The galvanized coating protects the base steel supplying cathodic and barrier protection. Make sure the coater has had previous experience with powder over galvanized steel. 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.

Even so there are still some problems during this application. 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.