再结晶退火温度对含Cu铁素体抗菌不锈钢耐蚀性的影响

通过金相分析、FeCl₃点腐蚀试验、点蚀坑形貌观测、极化曲线测试等方法,研究了再结晶退火温度对含Cu铁素体抗菌不锈钢耐蚀性的影响。结果表明:在860～980 ℃范围内保温5 min,含Cu铁素体抗菌不锈钢再结晶程度逐渐提升,耐蚀性先增强后减弱,最佳再结晶退火温度为900 ℃。含Cu铁素体抗菌不锈钢在酸性FeCl₃溶液中点蚀坑呈开放式,随再结晶退火温度的升高,点蚀坑面积及深度减小,在980 ℃退火时其数量明显增多。

Effect of recrystallization annealing temperature on corrosion resistance of copper-bearing ferritic antibacterial stainless steel

Effects of recrystallization annealing temperature on corrosion resistance of copper-bearing ferritic antibacterial stainless steel were studied by means of microstructure analysis, pitting corrosion test, pitting morphology observation and dynamic potential polarization curve test. The results show that the recrystallization degree of copper-containing ferritic antibacterial stainless steel is gradually increased after holding for 5 min at 860-980 ℃, and the corrosion resistance first increases and then weakens. The optimum recrystallization annealing temperature is 900 ℃. The pitting pits of the copper-containing ferritic antibacterial stainless steel are open-type in the acidic FeCl₃ solution, and the pitting pit area and the depth decrease with the increase of recrystallization annealing temperature. The number of pitting pits increases obviously after annealing at 980 ℃.