Corrosion tests were done for silver plates in gaseous environment that contained H2S. After corrosion tests, electric contact resistance ρ of silver plate increased with exposed period of time t by the corrosion product Ag2S and was correlated linearly with the loss of weight W of Ag plate, that was derived from the formulae proposed and verified by the authors. Simple and useful procedure of corrosion life prediction was established for connectors composed of Ag, in which the environmental assessment plays an important role.
