Effects of Rare Earth Content on Corrosion Behavior of Al-Mg-Si Alloys for Automotive Body Sheets

He Suxia1; Liu Zhongxia1

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Effects of Rare Earth Content on Corrosion Behavior of Al-Mg-Si Alloys for Automotive Body Sheets
Vol. 31, Issue 5, Pages: 468-471(2011)
Published： 2011 ，
DOI：

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[1]贺素霞,刘忠侠.稀土含量对Al-Mg-Si汽车板材耐蚀性能的影响[J].特种铸造及有色合金,2011,31(05):468-471+391.

He Suxia1, Liu Zhongxia1. Effects of Rare Earth Content on Corrosion Behavior of Al-Mg-Si Alloys for Automotive Body Sheets. [J]. Special Casting & Nonferrous Alloys 31(5):468-471(2011)
[1]贺素霞,刘忠侠.稀土含量对Al-Mg-Si汽车板材耐蚀性能的影响[J].特种铸造及有色合金,2011,31(05):468-471+391. DOI：

He Suxia1, Liu Zhongxia1. Effects of Rare Earth Content on Corrosion Behavior of Al-Mg-Si Alloys for Automotive Body Sheets. [J]. Special Casting & Nonferrous Alloys 31(5):468-471(2011) DOI：

摘要

研究了合金中稀土含量及时效工艺对Al-Mg-Si合金汽车板材耐腐蚀性能的影响。结果表明

在一定的时效状态下

加入稀土有利于改善合金的性能。稀土的加入使合金腐蚀速度减小

腐蚀变得均匀

腐蚀程度显著减轻。稀土含量为0.2%时最佳

但稀土的加入易形成溶质贫化区

产生晶界电偶腐蚀

加重了合金的剥落腐蚀。

Abstract

Effects of rare earth（RE） content and aging treatment on the corrosion behavior of Al-Mg-Si alloys for automotive body sheet were investigated.The results show that at given aging treatment

RE element can decrease corrosion rate and improve the corrosion resistance of the alloy

and optimum content of RE is 0.2%.However

RE can make the alloy to form solute depletion zone and grain boundary corrosion

aggravating the exfoliation corrosion of alloys.

关键词

汽车板材稀土元素腐蚀抗力

Keywords

Automotive SheetRE ElementCorrosion Behavior

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