CAJ | 학술논문

目的：分析304不锈钢和316L不锈钢在电厂冷却塔内海水及烟气形成的模拟冷凝酸液环境中的耐蚀性能。方法利用浸泡试验和电化学试验方法测试两种不锈钢在模拟冷凝酸液中的腐蚀形貌、腐蚀率和极化曲线。结果304不锈钢在模拟冷凝酸液中的耐蚀性能较差，其腐蚀率及钝态稳定性受冷凝酸液pH值的影响较大；316L不锈钢在模拟冷凝酸液中的耐蚀性能较好，其腐蚀率及钝态稳定性受冷凝酸液pH值的影响较小。结论316L不锈钢在冷却塔冷凝酸液中的耐蚀性能明显优于304不锈钢。
목적：분석304불수강화316L불수강재전엄냉각탑내해수급연기형성적모의냉응산액배경중적내식성능。방법이용침포시험화전화학시험방법측시량충불수강재모의냉응산액중적부식형모、부식솔화겁화곡선。결과304불수강재모의냉응산액중적내식성능교차，기부식솔급둔태은정성수냉응산액pH치적영향교대；316L불수강재모의냉응산액중적내식성능교호，기부식솔급둔태은정성수냉응산액pH치적영향교소。결론316L불수강재냉각탑냉응산액중적내식성능명현우우304불수강。
Objective To analyze the corrosion resistance of 304 and 316L stainless steel which were exposed in cooling tower condensed acid produced in electric power plant. Methods The corrosion rate and polarization curves of 304 and 316L stainless exposed in cooling tower condensed acid were measured. Results Totally 304 stainless steel exhibited poor corrosion resistance. The pH of condensed acid had a great influence on the corrosion rate and passive performance of 304 stainless steel. 316L stainless steel exhibited good corrosion resistance. The pH of condensed acid had less influence on the corrosion rate and passive performance of 316L stainless steel. Conclusion The corrosion resistance of 316L stainless steel exposed in cooling tower condensed acid was much better than that of 304 stainless steel under the same conditions.