通过亚温淬火法制备了09CuPCrNi双相钢,采用中性盐雾试验、极化曲线的测定,研究了双相化处理对耐候钢耐腐蚀性能的影响.780℃亚温淬火的09CuPCrNi双相钢在5%的NaOH、H2SO4、HCl水溶液以及3.5%的NaCl水溶液中的腐蚀行为与09CuPCrNi耐候钢相似,自腐蚀电流密度分别比09CuPCrNi耐候钢降低了17.0%、18.2%、31.2%和17.8%.在腐蚀周期分别为48 h和120 h的盐雾试验中,双相钢的腐蚀速率分别比09CuPCrNi耐候钢降低了7.9%～22.2%和2.3%～13.0%.
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