| HUO Hong-wei,LI Hua-wei,CHEN Qing-yang,YIN Hong-sheng,CAO Zhong-qiu.Investigation of Corrosion Behavior and Formation Mechanism of Stannate Conversion Film on A291D Magnesium Alloy[J],36(5):1-3,11 |
| Investigation of Corrosion Behavior and Formation Mechanism of Stannate Conversion Film on A291D Magnesium Alloy |
| Received:May 16, 2007 Revised:October 10, 2007 |
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| DOI： |
| KeyWord:Magnesium alloy Conversion film Stannate Corrosion |
| Author | Institution |
| HUO Hong-wei |
College of Chemistry and Life Science, Shenyang Normal University, Shenyang , China |
| LI Hua-wei |
College of Chemistry and Life Science, Shenyang Normal University, Shenyang , China |
| CHEN Qing-yang |
College of Chemistry and Life Science, Shenyang Normal University, Shenyang , China |
| YIN Hong-sheng |
College of Chemistry and Life Science, Shenyang Normal University, Shenyang , China |
| CAO Zhong-qiu |
College of Chemistry and Life Science, Shenyang Normal University, Shenyang , China |
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| Abstract: |
| The optimal process of chemical conversion treatment for A291D magnesium alloy in the alkaline bath containing pyrophosphate and stannate was determined by the orthogonal experiments. The corrosion behavior of the specimens with and without the conversion film was investigated by the methods of collecting hydrogen gas and electrochemistry in 3. 5 wto-/o neutral NaCl solution. The microstructure, morphology and phase constitute of the conversion film were analyzed by scanning electron microscopy and X-ray diffraction meter. The formation mechanism of the conversion film was discussed. The results show that a MgSn03 . H20 conversion film is formed after treatment in the stannate solution, and the immersion test and potentiodynamic polarization show that the stannate conversion treatment can provide good protection to the A291D alloy. |
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