摘要
为了对合金元素Mn如何影响ZA35合金的电化学腐蚀性能有更深的认识,采用动电位极化方法测试了铸态ZA35和1.0%Mn-ZA35合金在不同温度的NaCl水溶液中的开路电位和极化曲线,分析了温度和合金元素Mn对合金电化学腐蚀性能的影响。实验结果显示:随着NaCl溶液温度升高,合金的开路电位下降(负移),并且1.0%Mn-ZA35合金较铸态ZA35的开路电位低;NaCl溶液温度升高,铸态ZA35合金和1.0%Mn-ZA35合金腐蚀电流密度逐渐增加;相同温度下,1.0%Mn-ZA35合金较铸态ZA35合金腐蚀电流密度大。Mn做为合金元素,在ZA35合金基体中固溶度很小,1.0%Mn-ZA35合金中析出富锰相,降低了耐腐蚀性能。
The corrosion behaviour of ZA35 alloy in NaCl aqueous solution at different temperatures was studied by means of potentiodynamic polarization to know the effect of temperature and alloying element Mn on electrochemical corrosion of ZA35 alloy. The result shows that：when the temperature is elevated, the open-circuit potential （OCP） of alloys is gradually shifted in the negative direction, the OCP of 1.0% Mn-ZA35 alloy is lower than that of ZA35 alloy. when the temperature is elevated, the corrosion current density of alloys is increased, the corrosion current density of 1.0% Mn-ZA35 alloy is higher than that of ZA35 alloy. As alloying element, the solid solubility of Mn in ZA35 matrix is very little. The rich Mn phase is the main reason of 1.0% Mn-ZA35 alloy with poor corrosion resistance.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2009年第5期3-5,共3页
Surface Technology
基金
辽宁省科技攻关项目(2006304009)
辽宁工程技术大学博士基金项目(0994)
