不同挤压道次FeCoCrNiMo/5083Al基复合材料的腐蚀性能研究

doi:10.11896/cldb.24120199

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Abstract AA5083 aluminum is widely used in ships and marine equipment owing to its excellent corrosion resistance and high strength. This work investigates the effects of ECAP pass number and Cl^- concentration on the corrosion behavior of a 15 vol% FeCoCrNiMo HEA-reinforced AA5083 composite. The results show that after 1—4 ECAP passes, all specimens exhibit pronounced anodic passivation, with pitting as the do-minant corrosion mode. The three-pass condition delivers the best corrosion resistance, as evidenced by the most favorable E_corr and I_corr. With increasing pass number, grain refinement and solute redistribution mitigate grain-boundary segregation, homogenize the electrochemical response, and strengthen interfacial metallurgical bonding; meanwhile, an appropriate density of dislocations and subgrain boundaries promotes rapid nuc-leation and self-healing of the passive film, thereby improving corrosion resistance. In electrolytes of higher ionic strength, the elevated Cl^- concentration becomes the governing factor that aggravates corrosion, leading to a negative shift of E_corr, an increase in I_corr, and a sharp rise in pitting susceptibility. This behavior is attributed to Cl^- induced dissolution of the passive film, enlargement of the effective reaction area, and the intensified galvanic coupling between the Al matrix and the HEA reinforcement. These findings highlight that optimizing the ECAP processing route and controlling Cl^- containing environments are critical to enhancing the marine corrosion resistance of this composite.

Key words： multi-channel equal-diameter angular extrusion high entropy alloy corrosion pitting corrosion

Published: 10 March 2026 Online: 2026-03-10

CLC number:

GT146.2

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	Articles by authors
	QIAN Sicheng
	HE Yiqiang
	HUAN Changbao
	GU Hang
	WANG Tong
	TAO Kai
	HUANG Wei
	HE Xiao
	CAO Ying
	LU Hanwen

Cite this article:

QIAN Sicheng,HE Yiqiang,HUAN Changbao, et al. Study on the Corrosion Performance of FeCoCrNiMo/5083Al Matrix Composites with Different Extrusion Passes[J]. Materials Reports, 2026, 40(5): 24120199-6.

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https://www.mater-rep.com/EN/10.11896/cldb.24120199 OR https://www.mater-rep.com/EN/Y2026/V40/I5/24120199

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