| GAO Li-Ii,ZHANG Chun-hong,HUANG Xiao-mei,ZHANG Mi-Iin.Study on Corrosion Characteristic of Mg-1lLi-3AI-0.5RE Alloy in Acidic Solution of NaCI[J],37(2):4-7 |
| Study on Corrosion Characteristic of Mg-1lLi-3AI-0.5RE Alloy in Acidic Solution of NaCI |
| Received:December 19, 2007 Revised:April 10, 2008 |
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| DOI： |
| KeyWord:Mg-1lLi-3Al-O. SRE alloy Acidic NaCI solution Corrosion |
| Author | Institution |
| GAO Li-Ii |
Key Laboratory of Superlight Materials and Surface Technology, Harbin Engineering University, Harbin , China |
| ZHANG Chun-hong |
Key Laboratory of Superlight Materials and Surface Technology, Harbin Engineering University, Harbin , China |
| HUANG Xiao-mei |
Key Laboratory of Superlight Materials and Surface Technology, Harbin Engineering University, Harbin , China |
| ZHANG Mi-Iin |
Key Laboratory of Superlight Materials and Surface Technology, Harbin Engineering University, Harbin , China |
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| Abstract: |
| Corrosion behavior of Mg-1lLi-3Al-O. SRE alloy in acidic solution of NaCl was investigated by means of weight loss and electrochemical means. The corrosion appearance and corroded surface were analyzed by using SEM and XRD. The results showed that the average corrosion velocity of Mg-1lLi-3Al-O. SRE alloy increased, nevertheless the pitting corrosion potential, Rsol, Rt, and Rf decreased when the concentration of Cl- increased in acidic solution of NaCl. This means that corrosion developed more seriously with the increase of Cl- concentration. The corrosion current gradually increased while linear resistance decreased with the decrease of pH value, so that the corrosion reaction was picked up. In acidic solution of NaCI, the deep corrosion pits were formed after corrosion experiments, and the corrosion products on alloys surface were mainly consisted of Mg( OH)2 and Al203. |
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