The Electro-Chemical Corroding of Powder-Corrosion and the Analvsis of Valent-Electron Structure

Three ancient bronze fragments casted in different ages were unearthed from different locations. Methods of XFS, XRD and SEM are employed to determine the element-content of alloys. and the composition and structure of the corrosion （PC） The sectional photograph show that one of the paths to form PC from Cu-Sn alloy is the crystal-gap-corroding, which destroys the bronze relic more seriously.