期刊
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
卷 65, 期 10, 页码 999-1006出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/maco.201307492
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Microstructure and corrosion behaviour in simulated body fluid of as-cast and heat treated Mg-xZn (x = 3 and 6) alloys for different heat treatment times were studied. The results revealed that as-cast Mg-3Zn alloys consist of Mg12Zn13 phase and alpha-Mg matrix, while Mg-6Zn is composed of Mg51Zn20, Mg12Zn13 compounds and alpha-Mg matrix. After heat treatment of Mg-6Zn alloy at 340 degrees C, the Mg51Zn20 phase decomposed to the matrix and Mg12Zn13 while, the microstructure of Mg-3Zn remained unchanged. The results also indicated that heat treatment at 340 degrees C has little influence on the corrosion behaviour of Mg-3Zn. In contrast, heat treatment improved the corrosion resistance of the Mg-6Zn alloy as the decomposition of the Mg51Zn20 phase decreased micro-galvanic corrosion. The corrosion resistance of both as-cast Mg-3Zn and Mg-6Zn alloys marginally improved with increasing heat treatment times.
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