模拟铁器文物恒电位脱氯控制电位的研究  

THE CONTROL POTENTIAL DURING POTENTIOSTATIC DESALINATION OF SIMULATED CAST IRON ARTIFACTS

作　　者：欧阳维真[1] 许淳淳[1] 岳丽杰[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《腐蚀与防护》2005年第3期93-95,99,共4页Corrosion & Protection

基　　金：国家十五科技攻关项目(2001BA805B 01)

摘　　要：采用模拟闭塞电池恒电位极化法研究了模拟铁器文物在碱性溶液脱氯过程中外电位对闭塞区内电化学状态的影响。实验结果表明,外电位对闭塞区内电极电位和闭塞区内外电极间电偶电流影响很大,氯离子迁出率也与外电位密切相关。恒电位脱氯控制电位选择范围的上限值对应于临界电位,下限值应保证闭塞区内电极电位正于析氢电位。The influence of applied potentials on electrochemical states within occluded cell during desalination of simulated cast iron artifacts in alkaline solution was investigated by means of potentiostatic polarization of simulated occluded cell. The results showed that the potential of occluded specimen and the galvanic current between the external bulk and occluded specimen were strongly affected by the applied potential. Moreover, the migration ratio of chloride ions was closely associated with the applied potential. The control potential was selected in the range for which the upper limit represented the critical potential and the lower limit of the potential was chosen to ensure to avoid hydrogen evolution inside the occluded cell.

关 键 词：铁器文物 闭塞区 控制电位 

分 类 号：TG174.4[金属学及工艺—金属表面处理]