摘要
采用恒电位阴极极化法研究了模拟铁器文物在碱性溶液中恒电位脱氯过程氯离子的迁出规律以及脱氯电位的选取原则。实验结果表明:恒电位碱液脱氯实验随着处理时间延长和脱氯电位负移,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,氯离子迁移率和电效率交点所对应的电位值为合适的脱氯电位,本实验条件的最佳脱氯电位为-1.175V左右。经脱氯处理后的带锈试样表面XPS分析表明:腐蚀产物主要由Fe3O4和α-FeOOH相组成。
The chloride ion migration and choice of optimized potential during potentiostatic dechlorination of simulated cast iron artifacts in alkaline solution were studied by means of potentiostatic polarization. The longer the treatment time and the more negative the dechlorination potential, the more the extraction ratio of chloride ion and the less the electrical efficiency. The dechlorination potential was optimized with respect to the extraction ratio of chloride ion and the electrical efficiency, and the optimal potential was presented. Analysis of XPS indicated that the phases of Fe3O4 and α-FeOOH were found in the rust layer of the sample after the dechlorination treatment.
出处
《腐蚀与防护》
CAS
北大核心
2007年第7期337-339,366,共4页
Corrosion & Protection
基金
国家十五科技攻关项目(2001BA805B01)
关键词
铁器文物
恒电位脱氯
离子迁出率
电效率
Cast iron artifact
Potentiostatic dechlorination
Extraction ratio of chloride ion
Electrical efficiency
