Corrosion Resistance of Al-Si-Cu Die Casting Aluminum Alloy

Zhang Li~1; Wang Qudong~1; Hu Maoliang~1; Ding Wenjiang~1

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Corrosion Resistance of Al-Si-Cu Die Casting Aluminum Alloy
Vol. 31, Issue 11, Pages: 1021-1024(2011)
Published： 2011 ，
DOI：

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[1]张莉,王渠东,胡茂良,丁文江.Al-Si-Cu压铸铝合金的耐腐蚀性能[J].特种铸造及有色合金,2011,31(11):1021-1024.

Zhang Li~1, Wang Qudong~1, Hu Maoliang~1, et al. Corrosion Resistance of Al-Si-Cu Die Casting Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 31(11):1021-1024(2011)
[1]张莉,王渠东,胡茂良,丁文江.Al-Si-Cu压铸铝合金的耐腐蚀性能[J].特种铸造及有色合金,2011,31(11):1021-1024. DOI：

Zhang Li~1, Wang Qudong~1, Hu Maoliang~1, et al. Corrosion Resistance of Al-Si-Cu Die Casting Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 31(11):1021-1024(2011) DOI：

摘要

采用金属型铸造A380和A360压铸铝合金

研究了这两种合金的耐腐蚀性能

分析了Al-Si-Cu系合金的腐蚀机理。采用全浸试验方法测试腐蚀速率

腐蚀后试样用光学显微镜和带有能谱仪的扫描电镜观察试样表面腐蚀产物和腐蚀基体

结合电化学极化曲线分析腐蚀机理。结果表明

A360腐蚀速率比A380小

A380和A360在3.5%的NaCl溶液中浸泡都发生点蚀

腐蚀产物呈白色絮状

A380点蚀程度比A360严重

腐蚀形貌和腐蚀机理有明显区别。

Abstract

The corrosion behavior of A380 and A360 alloy prepared by permanent mould casting was investigated

and its corrosion mechanism was approached.Corrosion rate of the alloys was measured by the immersion experiment in 3.5% NaCl solution.Meanwhile

morphology of corrosive product and the matrix were observed by optical microscope and scanning electron microscope with energy dispersive spectroscopy.The corrosion mechanism was analyzed with the help of electrochemical polarization curves.The results reveal that the corrosion rate of the A360 alloy is lower than that of A380 alloy.Pitting erosion can be observed on both the A380 alloy and A360 alloy in 3.5%NaCl solution

and white-loccular corrosion product are distributed on the surface of the samples.However

the pitting erosion occurred in A380 alloy is more serious than that in A360 alloy.Meanwhile

the corrosion morphology and corrosion mechanism are obviously different in A380 alloy and in A360 alloy.

关键词

Al-Si-Cu铝合金金属型铸造腐蚀性能SEM-EDS极化曲线

Keywords

Al-Si-Cu AlloyPermanent Mould CastingCorrosion ResistanceSEM-EDSPolarization Curves

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Application of Squeeze on Permanent Mould Casting of Mg-Alloys

Influences of Fe,Ni and Cu on Corrosion Resistance of AXJ530 Magnesium Alloy

Corrosion Behavior of Magnesium Alloy in NaCl Solution Containing Inorganic Buffers

Corrosion Resistance of the Ceramic Coating on a Cast Al-14Si-5Cu-3Ni-1Mg Alloy Formed by Micro-arc Oxidation

Electrochemical Characterization for Inclusion Assessment in Aluminum Alloy