2 replies to this topic

[Mike Toluhi]

[Adriaan]

If you use different metals there is an electric potential at the interface; the lower grade metal will deteriorate faster.

[Doggert]

I'm not sure if your full question is in the subject, or if it was cut off.

Anyway, Adriaan is correct - there is the potential for galvanic corrosion which can lead to one metal deteriorating faster.

I thought I should mention that there is also the very real danger of mismatching CTE's (coefficient of thermal expansion) between the metals - which, depending on your application, can cause issues ranging from minor annoyance to catastrophic failure.

This is an extremely easy concept to understand, however you'd be absolutely amazed how often and to what degree this causes problems for engineers in the field.