ECAP变形后超硬铝合金的电化学腐蚀行为
Electrochemical Corrosion Behavior of Super-hard Aluminum Alloy Deformed by ECAP
摘 要
采用电化学测量技术,研究了等径转角挤压方法(ECAP)变形后的AA7075-T651铝合金在NaCl溶液中的电化学腐蚀行为.结果表明:同道次ECAP状态下,随着Cl-浓度增加,AA7075-T651的自腐蚀电位和点蚀电位负移,耐腐蚀性能降低;而在同浓度NaCl溶液中,随着ECAP挤压道次增加,AA7075-T651的自腐蚀电位和点蚀电位正移,耐腐蚀性能提高.本次试验也表明了Cl-浓度对于该铝合金耐腐蚀性能的影响程度要远超过ECAP技术.
超硬铝合金
极化曲线
等径转角挤压方法(ECAP)
electrochemical corrosion
super-hard aluminum alloy
polarization curve
ECAP
Abstract
The electrochemical corrosion behavior of aluminum alloy AA7075-T651 deformed by equal-channel angular pressing(ECAP) in NaCl solutions was studied by using electrochemical techniques.The experimental results showed that self-corrosion potential and pitting potential of AA7075-T651 deformed by the same EACP moved in negative direction with increasing Cl- concentration,However,in the same NaCl solution,self-corrosion potential and pitting potential of AA7075-T651 deformed by different EACP moved in positive direction with the increasing pressing pass,The influence of Cl- concentration on corrosion resistance of aluminum alloy was much greater than that of ECAP techniques.
中图分类号 TG174.3+6 TG146.2
所属栏目 应用技术
基金项目
收稿日期 2008/11/27
修改稿日期 2008/12/22
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引用该论文: CHANG De-gong,YU Ning-ning,LU Ming-li. Electrochemical Corrosion Behavior of Super-hard Aluminum Alloy Deformed by ECAP[J]. Corrosion & Protection, 2009, 30(12): 931～932
被引情况:
【1】张雅妮, "ECAP制超细晶材料的化学稳定性",腐蚀与防护 37, 51-55(2016)
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参考文献
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【2】Valiev R Z,Krasilnikov N A,Tsenev N K.Plastic deformation of alloys with submicron-grained structure[J].Materials Science and Engineering A,1991,137(15):30-40.
【3】蔡刚毅,吕广庶,马 壮.Al-Zn-Mg-Cu铝合金ECAP变形后的组织和性能[J].轻合金加工技术,2008,36(4):45-48.
【4】郑立静,张焱,曾梅光,等.ECAP制备的亚微米7050铝合金的力学性能和微观结构[J].中国有色金属学报,2002,12(5).
【5】赵西成,姚筱春,刘晓燕.ECAP变形对20MnSi钢组织与性能的影响[J].材料科学与工程学报,2006,24(3):396-398.
【6】Dey Swapna,K Gunjan Manoj,Chattoraj Indranil.Effect of temper on the distribution of pits in AA7075 alloys[J].Corrosion Science,2008,50(10):2895-2901.
【7】Min-Kyong Chung,Yoon-Seok Choi.Effect of the number of ECAP pass time on the electrochemical properties of 1050 Al alloys[J].Materials Science and Engineering A,2004,366(2):282-291.
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