In this article, we describe oxidation of molten Sn-0.07 wt% P alloy exposed in air at 280 degrees C. Although oxidation can be effectively reduced by the addition of trace phosphorus, the oxide film has a poor protection for the molten alloy with a high P concentration. The oxide film was analyzed by x-ray photoelectron spectroscopy. Comparing the results with the low P sample, there was a high phosphorous content in the film and a new Sn-P compound on the surface of the high P sample. It is assumed that the poor protection against oxidation of the film could be due to volatility of phosphorus in the Sn-P alloy at the temperature.
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[xian, ai-ping; gong, guo-liang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;xian, ap (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;ap.xian@imr.ac.cn
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