新干商代不锈青铜器的表层元素研究

STUDY ON SURFACE LAYER ELEMENTS FOR STAINLESS BRONZE WARE OF XINGAN IN SHANG DYNASTY

江西新干近年出土的商代大批青铜器中有数件显露光亮金属色泽迄今未锈蚀，同其它共存的重蚀铜器相比异常醒目。通过俄歇电子能谱及电子探针对不锈铜器碎片进行了表层元素分析，发现其外层含高量锡且含锡量高于内层，还在表层３～１０μｍ处检测到铼和稀土元素。结果表明样品表层存在一层含铼和稀土元素的富锡铜基合金，系优良防腐层。为研究考证新干商代不锈青铜器是否曾经人为的进行防腐涂层处理提供了实验依据。

There are several pieces, which appear bright metal color and no rust up to now, in large numbers of unearthed bronze wares in recent years in Xingan Jiangxi. They are exceedingly eye-catching compared with the other coexisting serious corroding bronze wares. We have carried out surface layer elements analysis on 451 #and 382 # stainless bronze ware fragmentaries by Auger electron energy spectroscopy and electron probe analysis, It was found that there was higher tin-containing content in their outer surface layer than that of inner layer. In addition, rehnium and rare earths were detected in the surface layer depth of 3～10μm, However, there was no rhenium or rare earths in the core of the bronze wares. The results showed that there is a layer rich tin alloy of copper-base containing rhenium and rare earths, which is a good anti-corrosion layer. The data will provide the experimental basis for study and textual research on the stainless bronze ware of Xingan in Shang dynasty if it was treated with anti-corrosion coating by man.