EFFECT OF H2S CONTACTS.

In this paper the author investigates the effect of H//2S, a common pollutant gas, on the materials of precious metal contacts. Ag, Au, Pt and Pd contacts were exposed to a static H//2S environment and also were subjected to make-and-break actions in the atmosphere. In both cases, the contact resistances and the surface film thickness wee measured. Also, the surface films were analyzed using electron diffraction and electron probe microanalysis. It was found that the effect was smallest on Au contacts.