- 期刊
6061鋁基復合材料在NaCl溶液磨耗腐蝕之研究
The Study of Corrosion Wear of 6061 Al/Al2O3 Metal Matrix Composites in NaCl Solution
摘要
The main objective of this work is to study the effect of chloride ion on the wear behaviour of Al/Al2O3 composites. Corrosion-wear test of Al alloy 6061/Al2O3 meatal matrix composites (MMCs) has been performed in a 3.5% NaCl solution at room temperature. The specimens were tested with a modified block-on-disc type machine, with a normal loading of 3.95 newtons and rotation speed of 90 rev/min. Three sets of specimens with different heat treatments were prepared. The heat treatments were: as-solutionized (530℃ for 2 hours), T6(aged at160℃ for 18hours), and overaged (aged at160℃ for 120 hours). After different periods of wearing test, the weight loss of each specimens was measured. The weight loss caused by the action of corrosion alone was very small. The weight loss of all specimens tested in the 3.5%solution was greater than that in the distilled water. The order of increasing wear resistance in the distilled water was: as-solutionized, overaged, and T6 condition. However, in the 3.5% NaCl solution the overaged specimen was found to suffer severe corrosion wear damage, and the one after T6 treatment was still the best amongst the three. It was found that the Al2O3/Al interface was corroded in the 3.5% NaCl solution, this caused the pull out of Al2O3 and obviously deteriorated the wear resistance of the MMCs.
並列摘要
The main objective of this work is to study the effect of chloride ion on the wear behaviour of Al/Al2O3 composites. Corrosion-wear test of Al alloy 6061/Al2O3 meatal matrix composites (MMCs) has been performed in a 3.5% NaCl solution at room temperature. The specimens were tested with a modified block-on-disc type machine, with a normal loading of 3.95 newtons and rotation speed of 90 rev/min. Three sets of specimens with different heat treatments were prepared. The heat treatments were: as-solutionized (530℃ for 2 hours), T6(aged at160℃ for 18hours), and overaged (aged at160℃ for 120 hours). After different periods of wearing test, the weight loss of each specimens was measured. The weight loss caused by the action of corrosion alone was very small. The weight loss of all specimens tested in the 3.5%solution was greater than that in the distilled water. The order of increasing wear resistance in the distilled water was: as-solutionized, overaged, and T6 condition. However, in the 3.5% NaCl solution the overaged specimen was found to suffer severe corrosion wear damage, and the one after T6 treatment was still the best amongst the three. It was found that the Al2O3/Al interface was corroded in the 3.5% NaCl solution, this caused the pull out of Al2O3 and obviously deteriorated the wear resistance of the MMCs.