交流电频率对X65钢在CO_3^(2-)/HCO_3^-溶液中腐蚀行为的影响  

Effect of Alternating Current Frequency on Corrosion Behavior of X65 Steel in CO_3^(2-)/HCO_3^-Solution

作　　者：朱敏[1] 杜翠薇[1] 李晓刚[1] 刘智勇[1] 赵天亮[1] 李建宽[1] 胡杰珍[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料工程》2014年第11期85-89,共5页Journal of Materials Engineering

基　　金：国家自然科学基金(51371036);国家自然科学基金重点项目(51131001)

摘　　要：通过极化曲线测试、浸泡实验和表面分析技术研究了不同交流电频率对X65钢在CO2-3/HCO-3溶液中腐蚀行为的影响。研究表明:在30~1000Hz范围内,除200Hz外,低交流电频率时(≤300Hz),随交流电频率的减小,其钝化区宽度明显变窄,点蚀击破电位负移,维钝电流密度增大,临界钝化电流密度增大;高交流电频率时(>300Hz),频率对X65钢的钝性影响很弱。X65钢的腐蚀速率随交流电频率的增加而减小,低交流电频率作用时,X65钢的腐蚀速率随交流电频率增加快速减小,高交流电频率时,其腐蚀速率随交流电频率的增加略减小。Effect of alternating current(AC)frequency(30-1000Hz)on corrosion behavior of X65 steel in concentrated carbonate/bicarbonate solution was studied by potentiodynamic polarization curve measurements,immersion tests and surface characterization technique.The results show that in the range of 30-1000 Hz,except 200 Hz,at low AC frequency(≤300Hz),as AC frequency decreases,the passivation region become obviously narrow,the broken potential of pitting corrosion shifts negatively,the passive current density increases and the critical passivation current density increases;at high AC frequency(>300Hz),frequency has a slight effect on the passivity of X65 steel.The corrosion rates of X65 steel decrease with the AC frequency increase,at low AC frequency,the corrosion rates of X65 steel decrease rapidly as AC frequency increases,while at high AC frequency,the corrosion rates decrease slightly as AC frequency increases.

关 键 词：X65钢 交流电频率 腐蚀行为 腐蚀速率 

分 类 号：TG171[金属学及工艺—金属表面处理]