AZ91D镁合金在硫酸盐溶液中的腐蚀行为

卢育发

doi:10.15980/j.tzzz.2014.11.032

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AZ91D镁合金在硫酸盐溶液中的腐蚀行为
Corrosion Resistance of AZ91D Magnesium Alloy for Solar Energy in Sulfate Solution
2014年34卷第11期页码：1222-1224
纸质出版日期： 2014 ，
DOI： 10.15980/j.tzzz.2014.11.032

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[1]卢育发.AZ91D镁合金在硫酸盐溶液中的腐蚀行为[J].特种铸造及有色合金,2014,34(11):1222-1224.

Lu Yufa. Corrosion Resistance of AZ91D Magnesium Alloy for Solar Energy in Sulfate Solution[J]. Special Casting & Nonferrous Alloys, 2014,34(11):1222-1224.
[1]卢育发.AZ91D镁合金在硫酸盐溶液中的腐蚀行为[J].特种铸造及有色合金,2014,34(11):1222-1224. DOI： 10.15980/j.tzzz.2014.11.032.

Lu Yufa. Corrosion Resistance of AZ91D Magnesium Alloy for Solar Energy in Sulfate Solution[J]. Special Casting & Nonferrous Alloys, 2014,34(11):1222-1224. DOI： 10.15980/j.tzzz.2014.11.032.

摘要

通过对比分析太阳能用压铸AZ91D合金在3.5%的NaCl溶液

0.5mol/L的Na2SO4溶液和0.5mol/L的MgSO4溶液中的腐蚀行为

系统研究了SO42-离子对AZ91D合金腐蚀行为的影响。结果表明

Mg（OH）2和Mg6Al2（OH）18·5H2O相是合金在溶液中的腐蚀产物。AZ91D合金在3种溶液中的腐蚀速率从大至小依次为:NaCl>MgSO4>Na2SO4;AZ91D合金在NaCl溶液中发生了点蚀

而在Na2SO4溶液和MgSO4溶液中以均匀腐蚀为主。

Abstract

Through analyzing the corrosion behavior of die cast AZ91 Dalloy in 3.5% NaCl solution

Na2SO4 solution and MgSO4 solution

effects of SO42-on corrosion behavior of die cast AZ91 Dalloy were investigated.The results show that Mg（OH）2and Mg6Al2（OH）18·5H2O phase are the corrosion product of die casting AZ91 Dalloy in solution.Corrosion rate of die casting AZ91 alloy in three different solutions from high to low is presented as follows:NaCl>MgSO4>Na2SO4.In addition

die casting AZ91 alloy exhibits pitting corrosion in NaCl solution

while it is characterized by uniform corrosion in Na2SO4 solution and in MgSO4 solution.