双相化处理对09CuPCrNi耐候钢腐蚀性能的影响

钢铁, 2008, 43(12): 79-0.

双相化处理对09CuPCrNi耐候钢腐蚀性能的影响

1.1.Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China

Effect of DualPhase Treatment on Corrosion Property of Weathering Steel 09CuPCrNi

ZHANG Chunling , CAI Dayong , LIAO Bo , FAN Yunchang

Keywords： dualphase steel;electrochemical potentiodynamic test;corrosion property;salt spray test

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%。

Dualphase steel 09CuPCrNi was prepared through intercritical quenching process. The influence of dualphase treatment on corrosion resistant property of the steel was studied by electrochemical potentiodynamic test and salt spray test. The results indicate that the corrosion behavior of the dualphase weathering steel quenched at 780 ℃ and original weathering steel in 5%NaOH, 5%HCl, 5%H2SO4 and 3.5% NaCl aqueous solutions was identical, but the dualphase steel showed lower corrosion current. In salt spray test, the corrosion rates (mm/a) of dualphase steels were lower by 7.9%~22.2% (48 h) and 2.3%~130% (120 h).

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