Discharge and corrosion behaviour of AP65 magnesium anode plates with different rolling reductions. Issue 84 (20th November 2017)

• Record Type: Journal Article
• Authors: Wang, Naiguang; Mu, Yangchang; Li, Qi; Shi, Zhicong
• Is Part Of: RSC advances. Volume 7:Issue 84(2017)
• Page Start: 53226
• Page End: 53235
• Publication Date: 2017-11-20
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra10652a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Surfaces of AP65 plates discharged at 180 mA cm −2 for 5 s after removing the oxidation products. The round pits on the 63% rolled plate indicate the active dissolution while the angular pits on other samples reveal the spalling of metallic pieces. Abstract : AP65 with strong discharge activity is an attractive magnesium anode used for high-power seawater activated batteries. Herein, we adopt multi-pass rolling to tailor the microstructure of AP65 and systematically study the effect of rolling reduction on its discharge and corrosion behaviour. The results indicate that 63% reduction uniformly refines the grains and favours the formation of nanometer sub-grains that distribute homogeneously in the magnesium matrix, hence promoting the active dissolution of the AP65 plate at 180 mA cm −2 and leading to its more negative discharge potential along with higher anodic efficiency compared with other samples. Furthermore, the microstructure features corresponding to different rolling reductions and their impacts on the electrochemical response of AP65 are also analyzed.