Effects of Al-Ce Master Alloy on Intergranular Corrosion Properties of A356 Aluminum Alloy

Duan Guoyi; Yang Xiangjie; He Yi

doi:10.15980/j.tzzz.2018.04.029

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Effects of Al-Ce Master Alloy on Intergranular Corrosion Properties of A356 Aluminum Alloy
Vol. 38, Issue 4, Pages: 458-461(2018)
Published： 2018 ，
DOI： 10.15980/j.tzzz.2018.04.029

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[1]段国燚,杨湘杰,何毅.Al-Ce中间合金对A356合金晶间腐蚀性能的影响[J].特种铸造及有色合金,2018,38(04):458-461.

Duan Guoyi, Yang Xiangjie, He Yi. Effects of Al-Ce Master Alloy on Intergranular Corrosion Properties of A356 Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 38(4):458-461(2018)
[1]段国燚,杨湘杰,何毅.Al-Ce中间合金对A356合金晶间腐蚀性能的影响[J].特种铸造及有色合金,2018,38(04):458-461. DOI： 10.15980/j.tzzz.2018.04.029.

Duan Guoyi, Yang Xiangjie, He Yi. Effects of Al-Ce Master Alloy on Intergranular Corrosion Properties of A356 Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 38(4):458-461(2018) DOI： 10.15980/j.tzzz.2018.04.029.

摘要

通过在A356合金中添加不同含量的Al-Ce中间合金

研究了稀土Ce对A356铝合金晶间腐蚀形貌、腐蚀深度以及腐蚀失重速率的影响。结果表明

未添加Al-Ce中间合金时

A356合金有明显的晶间腐蚀现象;添加不同量的Al-Ce中间合金

A356合金的抗晶间腐蚀性能得到改善且随着Al-Ce中间合金添加量的增加呈先增高后下降的趋势。当Al-Ce中间合金添加量为0.1%时

A356合金分别具有42.5μm的最小腐蚀深度

及0.786 5×10

-4

g/（cm

·h）的最小腐蚀失重速率

表现出最好的抗晶间腐蚀性能。

Abstract

The effects of rare-earth element Ce on the intergranular corrosion

corrosion depth and corrosion weight loss rate of A356 alloy were investigated by adding various content of Al-Ce master alloy into A356 alloys.The results reveal that the A356 alloy without Ce has severe intergranular corrosion.The addition of Al-Ce master alloy can improve the intergranular corrosion resistance of A356 alloy.With the increase of Al-Ce master alloy

the corrosion resistance of A356 alloy is increased firstly and then decreased.The A356 alloys with 0.1% Al-Ce master alloy has the least intergranular corrosion depth of42.5 !m and minimum weight loss rate of 0.786 5×10

-4

g/（cm

·h）

respectively

showing the optimal intergranular corrosion resistance.