The corrosion of Al-supersaturated Mg matrix and the galvanic effect of secondary phase nanoparticles. (15th May 2021)

• Record Type: Journal Article
• Authors: Wu, Peng-Peng; Song, Guang-Ling; Zhu, Yi-Xing; Feng, Zhen-Liang; Zheng, Da-Jiang
• Is Part Of: Corrosion science. Volume 184(2021)
• Publication Date: 2021-05-15
• Subjects: A. Mg-Al alloys -- B. EIS -- B. Polarization -- B. TEM -- C. Surface film; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2021.109410
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: The effect of highly supersaturated Al on the corrosion of the Mg matrix was revealed. The micro galvanic effect of Mg17 Al12 phase nanoparticles was comprehensively investigated. The critical size of the cathodic particles on the corrosion behavior of Mg was theoretically analyzed. Abstract: A series of Al-supersaturated Mg alloys were fabricated by magnetron-sputtering and their corrosion behavior was investigated. The results showed that the supersaturated Al in the matrix facilitated the formation of a uniform and protective surface film and effectively suppressed the micro-galvanic corrosion. The secondary phase nano-particles smaller than a critical size did not have an evident deteriorating effect on the micro galvanic corrosion of the Al-supersaturated alloys.