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Effect of indium addition on corrosion of AP65 magnesium alloy

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Abstract

The effect of indium addition on the corrosion behavior of AP65 Mg alloy was examined. The indium modified AP65 exhibits accelerated pitting corrosion and overall corrosion, but there is almost no incubation period at the onset of corrosion. Polarization curve measurements indicate that the indium modified AP65 has more negative corrosion potential, which is an improvement aspect of the electrochemical activation. The corrosion current density increases from 0.126 to 0.868 mA/cm2 with and without 2.0% (mass fraction) indium addition. The mean potentials of AP65 negatively shift from −1.491 V to −1.584 V by adding 2.0% indium. The effect of indium addition on the corrosion performance of AP65 seems to be associated with the decrease of cathode-to-anode area ratio of the alloy, which may change the electrochemical anode and cathode polarization behavior of the alloy.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Central South University, Changsha, 410083, China

    He-xi Jin  (金和喜), Ri-chu Wang  (王日初), Chao-qun Peng  (彭超群), Kai Shi  (石凯) & Yan Feng  (冯艳)

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  1. He-xi Jin  (金和喜)
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  2. Ri-chu Wang  (王日初)
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  3. Chao-qun Peng  (彭超群)
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  4. Kai Shi  (石凯)
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  5. Yan Feng  (冯艳)
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Correspondence to Ri-chu Wang  (王日初).

Additional information

Foundation item: Project(JPPT-115-168) supported by the National Key Science and Technology Program of China; Project(51101171) supported by the National Natural Science Foundation of China

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Jin, Hx., Wang, Rc., Peng, Cq. et al. Effect of indium addition on corrosion of AP65 magnesium alloy. J. Cent. South Univ. 19, 2086–2093 (2012). https://doi.org/10.1007/s11771-012-1249-1

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  • DOI: https://doi.org/10.1007/s11771-012-1249-1

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