Corrosion of bronze by acetic and formic acid vapours, sulphur dioxide and sodium chloride particles

摘要

This paper studies the corrosion of patinated and unpatinated bronze by acetic and formic acid vapours, sulphur dioxide and sodium chloride salt particles, at 100% relative humidity. Weight loss, X-ray diffraction, infrared and scanning electron microscopy were the techniques used. Acetic and formic acid vapours, sulphur dioxide and sodium chloride produce a high corrosion rate on bronze. In general, no protective effect was found by the patina on bronze. The principal compounds identified were Cu2O, Cu2S, Cu5(SO4)2(OH)6. 5H2O, Cu(CH3CO2)2. XH2O and Cu(HCO2)2.