Collins, MN,Reid, M,Dalton, E,Shannon, K,Garfias-Mesias, LF

2013

January

Materials And Corrosion-Werkstoffe Und Korrosion

Corrosion under mixed flowing gas conditions of various connector coatings

Published

()

atmospheric corrosion coatings gold nickel palladium PRE-PLATED LEADFRAMES TEST ENVIRONMENT CREEP CORROSION GOLD-FLASH COPPER DIFFUSION CONTACTS RESISTANCE BARRIER FILMS

64

7

13

This paper presents an investigation on the corrosion performance of Ni/Au, NiP/Au, Ni/NiP/Au and Ni/NiPd/Au electrical connector coating systems. The coating systems were exposed to 10 days Class III mixed flowing gas and were subsequently examined by X-ray diffraction, focused ion beam microscopy, scanning electron microscopy and energy dispersive spectroscopy to evaluate the performance of each coating system. The Ni/Au coating system showed the worst performance followed by NiP/Au and Ni/NiP/Au. The Ni/NiPd/Au coated connector materials exhibited the least surface corrosion and this was attributed to a number of factors including a thicker coating system, more compact gold layer with fewer defects and a reduction in the electrochemical potential difference between layers reducing the local cell effect.

10.1002/maco.201106340