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Compatibility of Zinc #3 (Zamak) and 6262-T9 Aluminum

2007

I have a development project for an application in which some very small spring drive shafts must slide in close fitting holes in a housing. The housing is being die cast from Zamak and I plan to fab the shafts from 6262-T9 Aluminum. Given the application, a 20 year shelf life is required. Can I expect corrosion or galvanic activity between the two metals to be a problem? If so, any suggestions on surface treatments that might solve the problem?

Thanks,

William D. Chamlee

William D. Chamlee
Engineering Consultant - Texarkana, Texas

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Motorcycle Locks directly exposed to weather with an Aluminium Rotor and Zinc Diecast outer shell corrode badly within months leading to the assembly jamming. An interface comprising of a zinc alloy plating helps delay corrosion to some extent, but Nickel in between would be a better choice.

Khozem Vahaanwala
Saify Ind

Bengaluru, Karnataka, India

2007