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Corrosion protection A380 cast aluminum with chrome


Application: Automotive OEM production fuel door.

I need suggestions for corrosion protecting the areas where the plating posta are broken off after plating, exposing the bare substrate to the elements. The doors are ASTM 380 cast aluminum that's being chrome plated with a satin finish.

I want a simple solution so the assembler can apply corrosion protection by hand. The volumes are too low to justify an automated operation. I have tried 4 different corrosion inhibitors in areas where I experimentally took a sample piece of the same material that was plated to the same spec and then milled off small areas. I then subjected the parts to a salt corrosion test. All corrosion inhibitors have failed. Suggestions would be appreciated. I will accept a painting solution and/or a brush on application of another corrosion inhibitor. Thanks in advance for your help.

Bill Slabey
Automotive OEM supplier - Livonia, Michigan


I am not familiar with the manufacture of that component and am not picturing it well, so forgive me if there is something obviously wrong with my suggestion, but how about brush anodizing those areas?

Ted Mooney,
Ted Mooney, P.E.
Striving to live Aloha - Pine Beach, New Jersey

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