不同铝合金对Al/Mg/Al层状复合材料腐蚀行为的影响

doi:10.11896/cldb.22090163

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Abstract Magnesium alloy and aluminum alloy were hot rolled to prepare Al/Mg/Al laminated composites. Combined with hydrogen evolution test, electrochemical test and galvanic test, the corrosion behavior of 1060/AZ31/1060, 5052/AZ31/5052 and 6061/AZ31/6061 in 3.5wt% NaCl solution was tested. By analyzing the corrosion morphology, corrosion products, hydrogen evolution rate, potentiodynamic polarization curve and AC impedance spectrum, the corrosion mechanism of Al/Mg/Al laminated composites was explored. The results show that the corrosion resistance of Al/Mg/Al laminated composites surface is similar to that of aluminum alloy, and the corrosion current density is reduced by two orders of magnitude compared with that of the original magnesium alloy. The corrosion products of the cross-section of the Al/Mg/Al laminated composites are distributed densely on the magnesium side, and the corrosion behavior is mainly affected by the galvanic effect. The galvanic current of the Mg-Al galvanic couples can reach the order of 10^-3 A·cm^-2. The galvanic current densities and galvanic potentials of the three Mg-Al galvanic couples corresponding to the Al/Mg/Al laminated composites are similar to the theoretical fitting values of the mixed potential. Among the three Al/Mg/Al laminated composites, 5052/AZ31/5052 has the best overall corrosion resistance.

Key words： Al/Mg/Al laminated composites electrochemical galvanic corrosion hydrogen evolution corrosion products

Published: 25 June 2024 Online: 2024-07-17

CLC number:

TG335.81

Fund:Guangdong Major Project of Basic and Applied Basic Research (2020B0301030006).

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	Articles by authors
	GUO He
	JIAO Jinchao
	ZHANG Jin
	WANG Xudong
	LIAN Yong
	FENG Bo
	FENG Xiaowei
	ZHENG Kaihong
	DING Xiaoyun
	HAN Dong

Cite this article:

GUO He,JIAO Jinchao,ZHANG Jin, et al. Influence of Different Aluminum Alloys on Corrosion Behavior of Al/Mg/Al Laminated Composites[J]. Materials Reports, 2024, 38(12): 22090163-8.

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http://www.mater-rep.com/EN/10.11896/cldb.22090163 OR http://www.mater-rep.com/EN/Y2024/V38/I12/22090163

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