模拟青铜文物在乙酸气氛中的腐蚀行为  

Corrosion Behavior of Simulated Bronze Relics in Acetic Acid Atmosphere

作　　者：吴雪威[1] 闫莹[1] 周浩[2] 吴来明[2] 史笔函 朱以亮 蔡兰坤[1] WU Xuewei;YAN Ying;ZHOU Hao;WU Laiming;SHI Bihan;ZHU Yiliang;CAI Lankun(East China University of Science and Technology, Shanghai 200237, China;Shanghai Museum, Shanghai 200050, China)

机构地区：[1]华东理工大学,上海200237 [2]上海博物馆,上海200050

出　　处：《腐蚀与防护》2018年第4期258-264,326,共8页Corrosion & Protection

基　　金：国家自然科学基金项目(51671117);上海市科委科研计划重点支撑项目(13231203000)

摘　　要：采用电化学法制备了3种带锈青铜,以模拟青铜文物进行腐蚀试验。使用扫描电镜(SEM)、X射线衍射(XRD)和Raman光谱等方法分析了3种带锈青铜及裸青铜在乙酸气氛中腐蚀后的表面形貌和腐蚀产物。结果表明:在乙酸气氛中腐蚀后,裸青铜表面被腐蚀产物覆盖,且随腐蚀时间的延长,腐蚀产物增多,其腐蚀产物主要有Cu2O、碱式醋酸铜和醋酸铜;带Cu2O锈青铜表面的Cu2O立方晶体被破坏,转变成针状腐蚀产物,其腐蚀产物有碱式醋酸铜和醋酸铜;带CuCl锈青铜并未与乙酸发生反应,而是CuCl与空气中的水和氧气反应生成碱式氯化铜;混合锈具有三层结构,对青铜基体有一定的保护作用,其三层锈层的腐蚀是同时进行的,其腐蚀产物有碱式氯化铜、碱式醋酸铜和醋酸铜。Three kinds of bronze covered with patina were prepared by electrochemical method to simulate bronze relics for corrosion test.The surface morphology and corrosion products of three kinds of patinated bronze and bare bronze after testing in acetic acid atmosphere were studied by scanning electron microscopy（SEM）,X-ray diffraction（XRD）and Raman spectroscopy.The experimental results indicate that the bare bronze surface was covered by corrosion products after corrosion in acetic acid atmosphere,the corrosion products of bare brone increased with the extension of corrosion time,and mainly included Cu2 O,copper hydroxide acetate and copper acetate.The cubic crystals of Cu2 O on the surface of bronze with Cu2 O patina were destroyed and converted into acicular corrosion products.The corrosion products of the brone with Cu2 O patina were copper hydroxide acetate and copper acetate.The CuCl patina on the surface of bronze did not react with acetic acid directly,but acted with water and oxygen in the air and generated copper chloride hydroxide.The mixed patina had three rust layers,providing protective effect on the bronze substrate to some extent.The corrosion of rust layers happened at the same time,and their corrosion products were copper chloride hydroxide,copper hydroxide acetate and copper acetate.

关 键 词：带锈青铜 青铜文物 乙酸气氛 拉曼光谱 

分 类 号：TG172[金属学及工艺—金属表面处理] TG174[金属学及工艺—金属学]