期刊
JOURNAL OF CENTRAL SOUTH UNIVERSITY
卷 19, 期 8, 页码 2086-2093出版社
JOURNAL OF CENTRAL SOUTH UNIV
DOI: 10.1007/s11771-012-1249-1
关键词
magnesium alloy; corrosion; electrochemical properties; indium
资金
- National Key Science and Technology Program of China [JPPT-115-168]
- National Natural Science Foundation of China [51101171]
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/cm(2) 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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