电化学噪声技术在2205钢点蚀行为研究中的应用  

Application of Electrochemical Noise Technology to the Study of Pitting Behavior of 2205 Steel

作　　者：李志刚[1] 彭东辉[1] 浦静雯[1] 徐静安[1] 

机构地区：[1]上海化工研究院,上海200062

出　　处：《腐蚀与防护》2018年第1期11-16,共6页Corrosion & Protection

基　　金：中国石油和化学工业联合会-复混肥工程研究中心项目

摘　　要：采用电化学噪声技术监测2205钢在0.05mol·L-1 HCl+6%FeCl3溶液中的点腐蚀行为。从电化学噪声的时域和频域分析以及腐蚀形貌观察等方面研究了2205钢的点蚀过程。结果表明:根据电化学噪声时域谱中噪声峰的特征,其点蚀形成过程可大致分为4个阶段。电流标准偏差SI、噪声电阻Rn以及电流功率谱密度曲线倾斜部分的斜率KI均能表征点蚀发展的剧烈程度。The pitting corrosion behavior of 2205 steel in 0. 05 mol· L-1 HCI＋6% FeC13 · 6H2O solution was characterized by electrochemical noise （EN） analysis technique. The corrosion processes for the steel were studied in detail by analyzing time-domain and frequency-domain characteristics of electrochemical noise together with the observation of corrosion morphology. The whole process clearly according to the characteristic EN transient peaks. resistance Rn and the slope of the current power spectrum can be divided into four steps, which can be differentiated It was found that the current standard deviation S1, noise density K1 can reflect the corrosion intensity.

关 键 词：电化学噪声 2205钢 点蚀 

分 类 号：TG172[金属学及工艺—金属表面处理]