摘要
利用一种新型的露点腐蚀模拟装置结合原位的电化学阻抗谱、电化学噪声等测试手段评价了304和316L两种不锈钢的盐酸露点腐蚀行为。结果表明,316L不锈钢表现出更优异的耐盐酸露点腐蚀性能,主要原因可归结为两点:一是316L不锈钢钝化膜中含有较高的Cr/(Cr+Fe)比以及较低含量的Fe;二是316L不锈钢钝化膜中含有能改善抗点蚀性能的Mo。
Hydrochloric dew point corrosion（DPC） behavior of 304 and 316 L stainless steels was investigated using a novel DPC simulation set-up with in situ measurements of electrochemical impedance spectroscopy and electrochemical noise. The results indicated that the DPC resistance of316 L stainless steel was superior to 304. The difference of the corrosion performance for the two stainless steels can be ascribed to the following two aspects： the ratio of Cr/（Cr＋Fe） is higher and the concentration of Fe is lower in the passive film of 316 L stainless steel. There exists Mo in the passive film, which can enhance its pitting resistance of 316 L stainless steel.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2016年第1期9-20,共12页
Corrosion Science and Protection Technology
关键词
露点腐蚀
不锈钢
钝化膜
dew point corrosion
stainless steel
passive film
