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What Plating Finish Should Be Used on Outdoor Brackets?

2002

What is the best plating option for a CRS stamped mounting bracket set that would be used on outdoor applications. Durability, corrosion resistance, and costs are important. I've been told several different options: Zinc plate ATSM ASTM B633 SC4, Hot-dip Galvanizing ASTM A123, and Nickel plating.

Anyone have any suggestions.

Tim Frank
- Akron, Ohio

Paint on top of a properly phosphatized surface is cheaper than plating or galvanizing and offers better salt spray resistance. Galvanizing will be more expensive than zinc plating because it will be significantly thicker; for that reason it will outperform plating. In general, nickel plating is not the answer for outdoor exposure unless aesthetic requirements dictate.

Ted Mooney, P.E.
Striving to live Aloha
(Ted can offer longterm or instant help)
finishing.com - Pine Beach, New Jersey
2002

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