Enhanced corrosion resistance of Mg–Sn–Zn–Al alloy by Y microalloying. (1st April 2019)

• Record Type: Journal Article
• Authors: Lee, Daseul; Kim, Beomcheol; Lee, Sooseok; Baek, Soo-Min; Kim, Jong Chan; Son, Hyeon-Taek; Lee, Jung Gu; Lee, Ki-Suk; Park, Sung Soo
• Is Part Of: Scripta materialia. Number 163(2019)
• Page Start: 125
• Page End: 129
• Publication Date: 2019-04-01
• Subjects: Magnesium -- Corrosion -- Phase -- Microalloying -- Volta potential; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.01.015
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: A significant enhancement in corrosion resistance by Y microalloying was achieved for the Mg–8Sn–1Zn–1Al (wt%) alloy in the extruded condition. Average corrosion rates obtained by immersion tests in 0.6 M NaCl solution at 25 °C were 4.2 and 12.7 mm y −1 for the alloys with and without microalloying with 0.04 wt% Y, respectively. Microstructural investigations indicated that the enhanced corrosion resistance is a result of a transition in a type of second-phase particles toward lowering the difference in electrochemical nobility between the α-Mg and these particles, thereby reducing the susceptibility of the alloy to microgalvanic corrosion. Graphical abstract: Unlabelled Image