Evaluation of pitting corrosion of thixoformed A356 alloy using a simulation model
Pitting behavior of thixoformed A356 alloy,with different reheating temperatures,was evaluated.Linear sweep voltammetric tests were used to study the pitting behavior of thixoformed,rheocast and gravity-cast A356 alloy in a 3.5％ NaCl solution.A simulation method was also used in order to identify local galvanic corrosion current density between local galvanic couples.The results obtained show that the resistance to pitting corrosion of the thixoformed samples formed at 600 ℃ is higher than that of the samples formed at 610 ℃ as well as rheocast and gravity-cast samples.These results could be explained by morphological aspects of silicon phase as well as the area effect as related to galvanic corrosion between silicon particles and eutectic aluminum phase.
rheocasting gravity casting A356 alloy corrosion pitting pitting microstructure
S.TAHAMTAN A.FADAVI BOOSTANI
Department of Materials Engineering, Isfahan University of Technology (IUT), Isfahan, Iran
国际会议
北京
英文
1702-1706
2010-09-16（万方平台首次上网日期，不代表论文的发表时间）