Corrosion Behavior of Magnesium Alloy in NaCl Solution Containing Inorganic Buffers

Jia Suqiu

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Corrosion Behavior of Magnesium Alloy in NaCl Solution Containing Inorganic Buffers
Issue 6, Pages: 484-486(2008)
Published： 2008 ，
DOI：

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[1]贾素秋.Mg-7.3Al合金在含无机缓蚀剂的NaCl溶液中的腐蚀行为[J].特种铸造及有色合金,2008(06):484-486+410.

Jia Suqiu. Corrosion Behavior of Magnesium Alloy in NaCl Solution Containing Inorganic Buffers. [J]. Special Casting & Nonferrous Alloys (6):484-486(2008)
[1]贾素秋.Mg-7.3Al合金在含无机缓蚀剂的NaCl溶液中的腐蚀行为[J].特种铸造及有色合金,2008(06):484-486+410. DOI：

Jia Suqiu. Corrosion Behavior of Magnesium Alloy in NaCl Solution Containing Inorganic Buffers. [J]. Special Casting & Nonferrous Alloys (6):484-486(2008) DOI：

摘要

通过浸没试验、极化曲线研究了Mg-7.3Al合金在含有NaF、Na2CO3及硼砂（Na2B4O7）3种无机缓蚀剂的（NaCl的质量分数为1%）溶液中的腐蚀行为。结果表明

Mg-7.3Al合金在含有3种缓蚀剂的NaCl溶液中的腐蚀速率随时间的延长而逐渐降低

超过48h后趋于平稳

在相同时间内腐蚀速率由小到大的顺序为Na2CO3、Na2B4O7、NaF。缓蚀剂的存在使Mg-7.3Al合金的腐蚀电位略有提高

在含Na2CO3的NaCl溶液中Mg-7.3Al合金的腐蚀电位最高。缓蚀效果由大到小的顺序是Na2CO3、Na2B4O7、NaF。

Abstract

Corrosion behaviors of magnesium alloy in 1% NaCl solution containing NaF or Na2CO3 or borate（1g/L

respectively）were investigated by immersion and polarization curve.The results indicate that corrosion rates of Mg-7.3Al magnesium alloy in three buffered solution are decreased with immersion time extending

which tends towards stable state after immersion for 48 hours.Degrees of corrosion rate are as follows:NaCO3 more than borate more than NaF under the same immersion time.Corrosion potential is slightly increased with the presence of buffers

in which the highest corrosion potential can be observed in 1% NaCl solution containing Na2CO3.Buffering effects follows in the order:Na2CO3 more than NaF more than borate.Na2CO3 exhibits desirable buffered effect on the Mg-7.3Al magnesium alloy.