镍添加对粉末冶金Al94.5Cu4Mg1.5耐腐蚀性能的提升作用*

doi:10.11896/j.issn.1005-023X.2017.020.009

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Abstract The present paper aims to investigate the influence of Ni content on the corrosion behavior (in 3.5% NaCl solution) of Al-Cu-Mg alloys whose nominal compositions are Al_94.5-xCu₄Mg_1.5Ni_x(x=0, 2, 4, 6, 8(wt%)), prepared by the conventional powder metallurgy process. Electrochemical test and weight loss experiment were carried out, and the phase composition, corrosion morphology and selected-area element analysis of the sintered samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), respectively. The results showed that the sintered samples possessed excellent inter-particle bonding. An intermetallic compound Al₃Ni₂ can be generated from Ni and Al in the sintering process. Pitting corrosion occurred in the Al-Cu-Mg matrix immersed in 3.5% NaCl solution. Ni addition can raise the corrosion potential of Al-Cu-Mg matrix, inhibit the corrosion current, thus mitigating the materia’s corrosion, and improving the corrosion resistance.

Key words： powder metallurgy Al-Cu-Mg alloy nickel addition corrosion resistance

Published: 25 October 2017 Online: 2018-05-05

CLC number:

TF125

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	Articles by authors
	ZHANG Chunzhi
	KONG Lingliang
	LI Huiping

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ZHANG Chunzhi,KONG Lingliang,LI Huiping. Improved Corrosion Resistance of Powder Metallurgical Al_94.5Cu₄Mg_1.5 by Nickel Addition[J]. Materials Reports, 2017, 31(20): 39-43.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.020.009 OR https://www.mater-rep.com/EN/Y2017/V31/I20/39

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