Determination and Generation of the Corrosion Compounds on Silver Exposed to the Atmospheres

摘要

The chemical compounds formed on silver, exposed at Bayuquan and Shenyang sites of China, havebeen studied via scanning electron microscopy, the coulometric reduction, X-ray diffraction and X-rayphotoelectron spectroscopy. Corrosion of silver at Shenyang is severer than at Bayuquan. AgCl, Ag2Sand Ag2SO4 were the main corrosion products. Ag2O appeared on silver at Bayuquan and nearlyunnoticeable at Shenyang. The amount of AgCl on silver exposed at Bayuquan is greater than atShenyang. Neither AgBr nor AgI was detected on silver. The amount of Ag2S at Shenyang is 2x of thatat Bayuquan.