北京科技大学学报Issue(1)：69-73,5.DOI:10.13374/j.issn1001-053x.2014.01.011
浓硫酸中904 L不锈钢焊接接头的耐蚀性能
Corrosion resistance of 904 L stainless steel welding joints in concentrated sulfuric acid
摘要
Abstract
Potentiodynamic polarization and electrochemical impedance spectroscopy ( EIS) were used to investigate the corrosion resistance of 904L stainless steel welding joints in concentrated sulfuric acid, and the corrosion mechanisms were analyzed in brief. Ex-perimental results show that there are no significant changes in cathodic polarization curves of the weld zone and the substrate, both of them are hydrogen reduction reaction process while an opposite trend is seen upon the anodic polarization curves. Compared with the substrate, the corrosion potential of the wilding zone decreases while the anode current increases. Welding contributes to the anode re-action. The corrosion of the substrate and the weld zone is mainly controlled by the electrochemical step. Both Nyquist graphs are simi-lar, which are composed of a single capacitive reactance arc, having a time constant. The corrosion resistance of the substrate is superi-or to the weld zone.关键词
不锈钢/硫酸/焊接/耐蚀性/动电位极化/电化学阻抗谱Key words
stainless steel/sulfuric acid/welding/corrosion resistance/potentiodynamic polarization/electrochemical impedance spectroscopy分类
金属材料引用本文复制引用
向嵩,曾洪涛,杨阳,何勇刚,刘松林..浓硫酸中904 L不锈钢焊接接头的耐蚀性能[J].北京科技大学学报,2014,(1):69-73,5.基金项目
贵州省工业攻关项目(20103016) （20103016）
贵州省社会发展攻关项目(20133072) （20133072）
贵州省优秀青年科技人才培养对象项目(201315) （201315）
贵阳市科技局资助项目(201120558) （201120558）
