Electrochemical Behavior of Mn-enriched Phase in High Mn ZA35 Alloy

Liu Jingfu1; Cui Jia1; Li Rongde2; Song Jian2; Chen Pengfei2

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Electrochemical Behavior of Mn-enriched Phase in High Mn ZA35 Alloy
Vol. 31, Issue 6, Pages: 510-513(2011)
Published： 2011 ，
DOI：

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[1]刘敬福,崔佳,李荣德,宋建,陈鹏飞.高锰ZA35合金中富锰相的电化学行为[J].特种铸造及有色合金,2011,31(06):510-513.

Liu Jingfu1, Cui Jia1, Li Rongde2, et al. Electrochemical Behavior of Mn-enriched Phase in High Mn ZA35 Alloy. [J]. Special Casting & Nonferrous Alloys 31(6):510-513(2011)
[1]刘敬福,崔佳,李荣德,宋建,陈鹏飞.高锰ZA35合金中富锰相的电化学行为[J].特种铸造及有色合金,2011,31(06):510-513. DOI：

Liu Jingfu1, Cui Jia1, Li Rongde2, et al. Electrochemical Behavior of Mn-enriched Phase in High Mn ZA35 Alloy. [J]. Special Casting & Nonferrous Alloys 31(6):510-513(2011) DOI：

摘要

为了探索析出的富锰相对高锰ZA35合金电化学腐蚀性能的影响规律

根据高锰ZA35合金中富锰相的元素组成

熔炼出析出相MnAl6。采用动电位极化方法测试了富锰相MnAl6和ZA35-1.2Mn合金在NaCl水溶液中的开路电位和极化曲线

利用X-射线衍射仪（XRD）检测了合金的相组成。结果表明

随着NaCl溶液温度升高

合金的开路电位下降

并且富锰相MnAl6较ZA35-1.2Mn合金的开路电位低

富锰相MnAl6较ZA35-1.2Mn合金腐蚀电流密度大。ZA35-1.2Mn合金在NaCl含量为3.5%的溶液中

析出的富锰相MnAl6将作为阳极区优先溶解。

Abstract

Precipitate phase MnAl6 was fabricated based on element distribution of Mn-enriched in high Mn ZA35 alloy to understand effects of precipitated phase on electrochemical behavior of high Mn ZA35 alloy. Open circuit potential against time and polarization curves of Mn-enriched phase MnAl6 and ZA35-1.2Mn in NaCl aqueous solution were measured by potential dynamic polarization

and phase constituent of the alloy was examined by XRD （X-ray diffraction）. The results show that with increasing in temperature of NaCl solution

the open-circuit potential （OCP）of the alloy is shifted gradually into the negative direction

and the OCP of the Mn-enriched phase MnAl6 is lower than that of ZA35-1.2Mn alloy

while corrosion current density is higher than that of the ZA35-1.2 Mn alloy. The precipitate MnAl6 phase in ZA35-1.2Mn alloy is dissolved preferentially as anode zone in 3.5% NaCl aqueous solution.