模拟铁器文物恒电流碱液脱氯技术  

Galvanostatic Dechlorination of Simulated Cast Iron Artifacts

作　　者：欧阳维真[1] 王蕾[1] 许淳淳[2] 

机构地区：[1]桂林空军学院,广西桂林541003 [2]北京化工大学材料科学与工程学院,北京100029

出　　处：《桂林工学院学报》2007年第4期572-575,共4页Journal of Guilin University of Technology

基　　金：国家"十五"科技攻关项目(2001BA805B01)

摘　　要：采用恒电流阴极极化法研究了模拟铁器文物在碱性溶液中恒电流脱氯过程氯离子的迁出规律以及脱氯电流密度的选取原则.实验结果表明:恒电流脱氯实验随着处理时间延长和阴极电流密度的增大,氯离子迁出率逐渐增加,电效率却逐步降低.综合考虑氯离子迁出率和电效率两个因素,氯离子迁出率和电效率交点所对应的值为合适的阴极电流密度,本实验条件的最佳阴极电流密度为0.50 mA/cm2.经脱氯处理后的带锈试样激光拉曼光谱分析表明:腐蚀产物中主要为Fe3O4、Fe2O3和α-FeOOH相,γ-FeOOH相基本消失.Chloride ion migration and the choice of optimized current density during galvanostatic dechlorination of simulated cast iron artifacts in alkaline solution are studied by galvanostatic polarization. The results show that with more treatment time and more current density, the extraction ratio of chloride ion increases, but less electrical efficiency. The current density is optimized with respect to the extraction ratio of chloride ion and the electrical efficiency, and the optional dechlorination current density is presented. Laser Raman test indicates after the electrolytic treatment that the phases of Fe3O4, Fe2O3 and α-FeOOH are found in the rust layer of the sample, but γ-FeOOH not found.

关 键 词：铁器文物 恒电流脱氯 离子迁出率 电效率 

分 类 号：TG174.4[金属学及工艺—金属表面处理]