Study on corrosion behaviour of AZ91 alloys at different aging time

International Conference on Innovative Research - ICIR EUROINVENT 2019

Salleh, S.H.^1^2 ; Zaidi, N.H.A.^1^3 ; Abdullah, S.S.C.^1^3

School of Materials Engineering, Universiti Malaysia Perlis, Perlis, Arau

02600, Malaysia^1

Centre of Excellence Geopolymer and Green Technology, Universiti Malaysia Perlis, Perlis, Arau

02600, Malaysia^2

Centre of Excellence Frontier Materials Research, Universiti Malaysia Perlis, Seriab, Kangar, Perlis

01000, Malaysia^3

关键词: AZ91 magnesium alloys;    Beta-phase;    Corrosion behavior;    Corrosion behaviour;    Corrosion mechanisms;    Hydrogen evolution reactions;    Hydrogen gas;    Mg17Al12 phase;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/572/1/012039/pdf
DOI  :  10.1088/1757-899X/572/1/012039

来源: IOP

【 摘 要 】

The current work presents the corrosion behavior of AZ91 magnesium alloys in 0.01M NaCl. 2 different aging time samples were used in this study. It is found that sample with 2 hrs aging time shows a better corrosion resistance as compared to the 4 hrs aging time. It is also showing a significant small amount of hydrogen evolution reaction (HER) during the hydrogen gas collection examination. XRD indicates a few β-Mg17Al12 phase formed at 4 hrs aged samples. This is suggested that the formation of β phase in the alloy were accelerating the corrosion rate due to the galvanic corrosion mechanism.