摘要
采用微观分析、电偶腐蚀试验、极化曲线分析等方法对AZ91-xCe压铸镁合金(x=0,0.85,1.7%)的微观组织及电偶腐蚀行为进行了研究。结果表明:稀土Ce细化了-αMg、-βMg17Al12相,在合金中形成针状和块状金属间化合物Al11Ce3,通过优化合金微观结构,减少合金腐蚀表面的活性点,生成含有稀土氧化物的腐蚀产物膜,提高了AZ91镁合金的抗电偶腐蚀性能。
The microstructure and galvanic corrosion resistance properties of die cast AZ91-xCe （cerium） magnesium alloys were studied by microanalysis, galvanic corrosion test and analysis of anodic polarization curves, where x is 0, 0.85, 1.7wt.%, respectively. The results indicate that Ce sufficiently refines α -Mg and β -Mg17Al12 grains, forms intermetallics Al11Ce3 in needles and particles in AZ91 and improves the galvanic corrosion resistance of AZ91 due to optimization of alloy microstructure, decrease of active points on surface and formation of corrosion product films containing Ce oxide.
出处
《铸造》
EI
CAS
CSCD
北大核心
2006年第7期689-691,共3页
Foundry
基金
吉林省科技发展重大项目(编号:20040315)
关键词
镁合金
铈
微观结构
电偶腐蚀
magnesium alloy
cerium
microstructure
galvanic corrosion
