摘要
利用表面机械研磨处理(SMAT)使Cu-10Ni合金表面纳米化.采用电化学极化曲线和电化学阻抗(EIS)技术,分别研究了原始粗晶的、经表面机械研磨处理60 min的和表面机械研磨处理60 min后200℃下退火6 h的Cu-10Ni合金在0.05 mol/L Na2SO4和0.05 mol/L H2SO4混合溶液中的电化学腐蚀行为.结果表明,表面机械研磨处理的Cu-10Ni合金腐蚀电位产生了负移,其耐腐蚀性能降低了,但其极化曲线呈现钝化特征.
By means of surface mechanical attrition treatment （SMAT）, a nanocrystalline （NC） surface layer was obtained on Cu-10Ni Alloy. The electrochemical corrosion behavior of three samples, i.e. the original coarse grain ones, the SMAT for 60 min ones, and the ones SMAT for 60 min plus annealed at 200℃ for 6 h, was investigated by means of potentiodynamic polarization and electrochemical impedance spectroscopy （EIS） techniques in 0.05 mol/L Na：SO4 ＋ 0.05 mol/L H2 SO4 solution. The result showed that the corrosion potential of the SMAT Cu-10Ni Alloy shifted to a more negative value with respect to the un-treated alloy claerly Implying a decrease of the corrosion resistance of Cu-10Ni alloy after SMAT. However, the SMAT alloy exhibited passivation behavior to certain extent in its polarization curve.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2012年第5期397-400,共4页
Corrosion Science and Protection Technology
基金
国家自然科学基金(51044007
51001079)
山西省自然科学基金(2011011020-1)资助
关键词
Cu-10Ni合金
表面机械研磨处理
电化学腐蚀
电化学阻抗
Cu-10Ni alloy, surface mechanical attrition treatment, corrosion electrochemistry, electrochemical impedance spectroscopy
