钛对ZA35合金在碱溶液中电化学行为的影响  

Effect of Ti on Electrochemical Behavior of ZA35 Alloy in Alkali Solution

作　　者：刘敬福[1] 杨光[1] 崔佳[1] 

机构地区：[1]辽宁工程技术大学材料科学与工程学院,阜新123000

出　　处：《机械工程材料》2013年第4期62-64,68,共4页Materials For Mechanical Engineering

基　　金：辽宁省创新团队项目(2008T137)

摘　　要：采用电化学工作站测试了不同钛含量(质量分数为0～0.15%)的ZA35合金在NaOH溶液中的开路电位和极化曲线,结合其显微组织和表面腐蚀形貌,探讨了钛对ZA35合金电化学腐蚀性能的影响规律。结果表明:试验合金的开路电位均随NaOH溶液温度的升高而降低;同样温度下,含0.1%钛的ZA35合金的开路电位最高;试验合金在弱极化时活化溶解,在强极化时发生钝化,含0.1%钛的ZA35合金较ZA35合金的耐腐蚀性能显著提高,在弱极化时,自腐蚀电流密度下降了46%。The open-circuit potential and polarization curve of ZA35 alloys with different Ti contents in NaOH solution were measured by means of electrochemical workstation for the effect of element Ti on electrochemical corrosion of ZA35 alloy in combination with their microstructure and surface morphology after corrosion. Results show that the open-circuit potential of alloys declined with increase of the temperature of NaOH solution. The open-circuit potential of ZA35-0. 1Ti alloy was higher than that of other ZA35 alloys at the same temperature. The alloys were dissolved during weak polarization and passivated during strong polarization. The corrosion resistance of ZA35-0. 1Ti alloy was improved obviously, compared with that of ZA35 alloy. The corrosion current densitv of ZA35-0. 1Ti atlov was 46% lower than that nf ZA35 alloy during weak polarization.

关 键 词：ZA35合金 NAOH溶液 极化曲线 腐蚀电流密度 钛 

分 类 号：TG146.1[一般工业技术—材料科学与工程]