Role of alloyed Y in improving the corrosion resistance of extruded Mg–Al–Ca-based alloy

Citation data:

Corrosion Science, ISSN: 0010-938X, Vol: 118, Page: 227-232

Publication Year:
2017
Usage 8
Abstract Views 7
Link-outs 1
Captures 17
Readers 17
Citations 12
Citation Indexes 12
Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/21567
DOI:
10.1016/j.corsci.2017.01.022
Author(s):
Baek, Soo-Min; Kang, Jeong Su; Shin, Hyung-Joon; Yim, Chang Dong; You, Bong Sun; Ha, Heon-Young; Park, Sung Soo
Publisher(s):
Elsevier BV; PERGAMON-ELSEVIER SCIENCE LTD
Tags:
Chemistry; Chemical Engineering; Materials Science; A. Alloy; A. Magnesium; B. Weight loss; C. Pitting corrosion
article description
We report that alloying with Y remarkably enhances the corrosion resistance of extruded Mg–Al–Ca-based alloy. The corrosion rates, measured by immersion tests in 0.6 M NaCl solution at 25 °C, were 0.31 and 1.84 mm y −1 for the Mg–6Al–1Zn–0.5Ca–0.3Mn (wt.%) alloys with and without 0.25 wt.% Y, respectively. The improved corrosion resistance is mainly attributed to a change in the type of Al-containing intermetallic particles toward reducing their electrochemical nobility, resulting in reduced H 2 evolution rate during corrosion.