Effect of Zn addition on the corrosion behaviours of as-cast BCC Mg-11Li based alloys in NaCl solution

• DOI: 10.1016/j.matdes.2022.111019
• Publication Date: 2022-08-03T01:07:55Z
• Authors: Chuanqiang Li; Binbin Deng; Linjie Dong; Binqing Shi; Yong Dong; Feng Peng; Zhengrong Zhang
• Keywords: Pitting Corrosion; Galvanic cell; Galvanic corrosion

Effect of Zn on the corrosion behaviours Mg-11Li-xZn (x = 0, 1, 3, 6; termed as L11, LZ111, LZ113, LZ116) alloys in 0.1 M NaCl solution has been investigated. The results reveal that resistance four increases following order LZ116 < LZ113 ≈ L11 LZ111. Besides, filiform-like occurs at early stage for alloys, while additional pitting preferentially emerges and with immersion time. small alloying can reduce rate Mg-11Li excess will accelerate due to existence micro-galvanic effect between second phase matrix. Regarding surface film, double layers considerable thick outer layer inner be observed top Nevertheless, is prone modify film contributes high LZ111 alloy, concentration rapid damage films further elevate rate.