摘要
采用动电位极化曲线和电化学阻抗谱方法研究了AZ61镁合金轧制板材的表面、侧面、截面在模拟海水中的腐蚀电化学行为,采用扫描电子显微镜对3个面的腐蚀形貌进行了观察。结果表明,AZ61镁合金轧制板材的表面、侧面、截面在模拟海水中的腐蚀均以孔蚀为主要特征;3个面腐蚀倾向由小到大的顺序为:表面<侧面<截面,耐蚀性能由优到劣的顺序为:表面>侧面>截面;造成3个面腐蚀行为及耐蚀性能不同的根本原因是轧制处理引起的材料微观组织的各向异性。
Potentiodynamic polarization curve and electrochemical impedance spectroscopy（EIS） techniques were employed to investigate the corrosion electrochemical behavior of the different faces of AZ61 magnesium alloy rolled sheets in simulated sea water.The surface morphology of the level,the side and the cross section of the corroded rolled sheet was observed using scanning electron microscopy（SEM）.Results show that the major corrosion form of the different faces is pitting for the rolled sheet in simulated sea water.The corrosion tendency of the three faces of the rolled sheet is levelsidecross section and their corrosion resistance order is opposite.The rolling brings about different effects on the microstructure of the three faces of the sheet,which determines their different anti-corrosion performance.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2011年第11期2018-2021,共4页
Rare Metal Materials and Engineering
基金
国家杰出青年科学基金(50725413)
重庆市自然科学基金(CSTC
2009BA4023)
重庆大学211工程创新人才培养计划(S-09103)
中央高校基本科研业务费(CDJRC10220002)
关键词
腐蚀
镁合金
轧制处理
耐蚀性能
微观组织
corrosion
magnesium alloy
rolling
corrosion resistance
microstructure
