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Commercial coating for 2024 aluminium fasteners

We are a manufacturer of special fasteners. We need a coating for 2024 Aluminium fasteners used in high volumes in commercial NOT aerospace applications and in quite hostile environments, frequently into stainless steel components. Alodine contains chrome 6 so is out. Many paint finishes Deltaseal/GZ/Xylan require Baking at temperatures above the acceptable 160-180 degrees C (much above this the alloy changes its characteristics)and the appliers seem, to have difficulty in controlling their temperatures!We need minimum 96 hours protection, preferably more.

David Harrison
Client - Birmingham, United Kingdom
April 1, 2008

Electroless nickel comes to mind. The sick green or brown that they put on deck screws might work as it is a dip/spin operation.

James Watts
- Navarre, Florida
April 4, 2008

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