Effects of Er Alloying on Corrosion Resistance of AM50 Alloy for Automotive Engine

Chen Yahua; Liao Huimin

doi:10.15980/j.tzzz.2016.06.007

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Effects of Er Alloying on Corrosion Resistance of AM50 Alloy for Automotive Engine
Vol. 36, Issue 6, Pages: 583-586(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.06.007

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[1]陈亚华,廖慧敏.汽车发动机用AM50合金的合金化与耐蚀性能[J].特种铸造及有色合金,2016,36(06):583-586.

Chen Yahua, Liao Huimin. Effects of Er Alloying on Corrosion Resistance of AM50 Alloy for Automotive Engine. [J]. Special Casting & Nonferrous Alloys 36(6):583-586(2016)
[1]陈亚华,廖慧敏.汽车发动机用AM50合金的合金化与耐蚀性能[J].特种铸造及有色合金,2016,36(06):583-586. DOI： 10.15980/j.tzzz.2016.06.007.

Chen Yahua, Liao Huimin. Effects of Er Alloying on Corrosion Resistance of AM50 Alloy for Automotive Engine. [J]. Special Casting & Nonferrous Alloys 36(6):583-586(2016) DOI： 10.15980/j.tzzz.2016.06.007.

摘要

对汽车发动机用AM50合金进行了Er合金化处理

研究了Er含量对AM50合金组织和耐腐蚀性能的影响。结果表明

Er微合金化AM50合金组织中除了含有α-Mg相和β-Mg17Al12相外

还形成了Al7ErMn5相和Al3Er相;随着Er含量增加

合金的腐蚀速率表现为先降低后升高的趋势。腐蚀速率和腐蚀形貌的观察结果表明

Er含量为0.5%时的AM50合金具有最佳耐腐蚀性能;随着AM50合金中Er含量的增加

合金的腐蚀剩余强度呈现先增加后降低的趋势

在Er含量为0.5%时具有较好的腐蚀剩余强度。

Abstract

The effects of Er addition on microstructure and corrosion resistance of AM50 alloy for automobile engine were investigated by optical microscopy and tensile testing.The results show that the Er alloyed AM50 alloy is composed ofα-Mg

β-Mg17Al12

Al7ErMn5 and Al3Er phase.With the increase of Er addition

the corrosion rate of the alloy is decreased firstly and then increased.The corrosion rate and corrosion morphology reveal that the AM50 alloy exhibits the desirable corrosion resistance with 0.5%Er addition.With the increase of Er addition in AM50 alloy

the corrosion residual strength is increased firstly and then decreased

and the satisfied corrosion residual strength can be observed with 0.5%Er addition.