In-situ investigation of atmospheric corrosion behavior of bronze under thin electrolyte layers using electrochemical technique  

应用电化学方法原位研究薄液膜下青铜的大气腐蚀行为(英文)

作　　者：廖晓宁[1,2] 曹发和[1] 陈安娜[1] 刘文娟[1] 张鉴清[1,3] 曹楚南[1,3] 

机构地区：[1]浙江大学化学系,杭州310027 [2]江西农业大学理学院,南昌330045 [3]中国科学院金属研究所腐蚀与防护国家重点实验室,沈阳110016

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第5期1239-1249,共11页中国有色金属学报（英文版）

基　　金：Projects (51131005, 51171172, 50801056) supported by the National Natural Science Foundation of China;Project (Y4110074) supported by Natural Science Foundation of Zhejiang Province, China

摘　　要：The atmospheric corrosion behavior of bronze under thin electrolyte layer （TEL） with different thicknesses was monitored using cathodic polarization curves, open circuit potential （OCP） and electrochemical impedance spectroscopy （EIS）. Cathodic polarization result indicates that the cathodic limiting current density increases with decreasing the TEL thickness. EIS result shows that the corrosion rate increases with decreasing the TEL thickness at the initial stage because the corrosion is dominated by the cathodic process, whereas after long immersion time, the corrosion degree with the TEL thickness is in the sequence of 150 μm 〉 310 μm〉 10μm ≈ bulk solution 〉 57 μm. The measurements of OCP and EIS present in-situ electrochemical corrosion information and their results are in good agreement with that of physical characterizations.采用阴极极化曲线、开路电位和电化学阻抗谱,监测青铜在不同薄液膜厚度下的大气腐蚀行为。阴极极化曲线结果表明,阴极极限电流密度随着液膜的减薄而增大。电化学阻抗谱结果表明,在腐蚀初期,腐蚀速率随着液膜的减薄而增加,这主要是由于腐蚀速率是由阴极过程控制的;随着时间的延长,腐蚀程度随着液膜厚度的变化从强到弱的趋势为:150μm,310μm,100μm,本体溶液,57μm。开路电位和电化学阻抗谱实验较好地再现了原位电化学腐蚀信息,且电化学结果与物理表征具有良好的一致性。

关 键 词：BRONZE thin electrolyte layer in-situ investigation atmospheric corrosion electrochemical technique 

分 类 号：TG172.3[金属学及工艺—金属表面处理]