Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1501033 | Scripta Materialia | 2010 | 4 Pages |
Abstract
The “black pad” phenomenon, which rarely occurs in electrolessly plated nickel–phosphorous (Ni–P) films, was reproduced. This work reports that nodular variation of the P content induces potential differences large enough to drive galvanic corrosion when the film is exposed to an electrolyte containing gold cyanide. Subsequent corrosion couple experiments using Ni–P films with different P contents demonstrated that preferential corrosion occurred at the low P side, and the propensity of forming black pad increased with the difference in P content (ΔP).
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
K.H. Kim, Jin Yu, J.H. Kim,