摘要
在温度为65℃,含有2mg/L骨胶和4mg/L硫脲的工业电解液中,测量Cu-Pb合金阳极溶解和钝化的电化学噪声数据。通过小波变换技术分析计时电位图,将噪声数据分为活跃区,预钝化区和钝化区。实验结果表明:在恒定电流密度为215mA/cm2的条件下,活跃区和预钝化区出现点状局部腐蚀,而在钝化区则出现均匀腐蚀和氧析出。
Electrochemical noise (EN) data were measured during the dissolution and passivation of an Cu-Pb anode at 65 °C in 1 L industrial electrolyte containing 2 mg of gelatine and 4 mg of thiourea. The EN data corresponding to three stages or regions of active, pre-passive and passive on chronopotentiogram curve were analyzed by wavelet transform technique. The results reveal the pitting type of localized corrosion form during both active and pre-passive stages under a constant current density of 215 mA/cm2. During the passive stage, a general corrosion form accompanied by oxygen evolution was observed.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2013年第6期1854-1862,共9页
Transactions of Nonferrous Metals Society of China
基金
the Electrometallurgical Consortium,Georges Houlachi from Hydro-Quebec Research Institute(LTE)at Shawinigan,Quebec Province
the Natural Sciences and Engineering Research Council of Canada(NSERC)for their financial support
关键词
电化学噪声
腐蚀
小波变换
铜
添加剂
计时电位测量法
electroctrochemical noise
corrosion
wavelet transform
copper
additives
chronopotentiometry
