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Letter 14028
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Tom Pullizzi |
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The stainless steel is not passivated (standard screw made from AISI316L).
Ronan LE LETTY
- Grenoble, France
The galvanic couple between aluminum and stainless steels is low voltage. The natural oxide forms a fairly passive surface. However, passivating stainless steel would assure a uniform oxide. Chromate conversion coatings protect aluminum well, however, The chromate film is soft and thin, making it easy to penetrate. I expect that an anodized surface on the aluminum would be better, unless the force of contace with the stainless steel is large enough to penetrate the anodized surface.
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Don Baudrand |
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