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Long Term Reliability of Silver Plated Aluminum without Nickel Barrier Layer

The nickel barrier layer normally used when silver, gold or copper is to be plated on an aluminum base metal adds significant cost. Is this barrier layer needed? Are there some good technical references that address this question?

James L. Alford
- Warren, New Jersey
2006

Copper, silver, gold, and zinc "walk" right thru each other like immigrants along a no fence boundary. Yes, a diffusion barrier is essential, otherwise in three weeks the zincate will be mixed with the silver and the silver will be well into the gold. Don't dare even think about it .

Robert H Probert
Robert H Probert Technical Services

Garner, North Carolina

2006

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