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Ted Mooney, P.E. RET
The authoritative public forum
for Metal Finishing 1989-2025
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Coating aluminum gates
Q. I need to paint or powder coat extruded aluminum gates. The gates are exterior . I would like to know which is the better system, wet paint or powder for durability. Secondly is chemical pre-treat better than sand blasting.
Ron Gatesfence contractor - Baldwin, Maryland, USA
2004
A. Ron, Powder is better as long as the aluminum is pretreated correctly, and the right powder formulation is used. Give it a conversion coat (Alodine) and then a TGIC Polyester. Etching the surface of the aluminum in a caustic dip tank system is preferable to sandblasting if you decide to go that route.
Sheldon Taylor
supply chain electronics
Wake Forest, North Carolina
2004
Q. I wanted to know best method of powder coating system in manual, and best method of recovery system in metallic powders. Also I wanted to know best method of painting manually with less wastage.
Suresh.D- India
2004
A. Unfortunately, Suresh, that's a series of very broad questions not answerable in a paragraph or two on the internet. You'll probably need to start with books like Bob Utech's Guide to High Performance Powder Coating [on Amazon affil links], and Norman Roobol's Industrial Painting and Powdercoating: Principles and Practices ⇦[this on Amazon affil links]. Then if you have rather specific questions that can be dispatched in a paragraph or so, I'm confident someone will help. Good luck.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2004
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