新干商代大墓青铜器腐蚀分析研究

为进一步了解新干商代大墓青铜器的腐蚀机理,用扫描电子显微镜、面探测器X衍射仪、离子色谱等仪器,对这批青铜器的腐蚀现象分三个方面进行了锈蚀结构、青铜基体、微观形貌观察的研究。研究结果表明,三种不同类型的腐蚀结构表面锈蚀成分主要是SnO2,样品表面锡含量均高于基体。漆古表面有龟裂纹,氧、锡元素分布从外至内层递减;铜元素从外至内递增。青铜器上残留土样中未检测出侵蚀性氯离子。实验结果可为保护这批青铜器提供科学依据。

Investigation of the corrosion of bronzes from the large Shang tomb in Xin'gan

In this work, bronzes form the large Shang tomb in Xin'gan, Jiangxi province were investigated. Several analytical methods were used to study patina structures, bronze bodies' composition and microscopic structure. The results demonstrated that the main composition of three types of superficial patina was SnO_2; the Sn content on the surface was always higher than that of bulk. Cracks on the qigu surface were observed. The content of elements O and Sn decreased from outer to inner patina layers; however the case for element Cu showed a contrary manner. Chlorine anion was not detected in residual soil samples attached to bronzes.