乙二醇冷却液中316L和304不锈钢的腐蚀行为研究  

Study on Corrosion Behavior of 316L and 304 Stainless Steel in Coolant of Ethylene Glycol

作　　者：陈晓东 CHEN Xiaodong(School of Mechanical and Electrical Engineering Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学机电工程学院

出　　处：《石油化工腐蚀与防护》2020年第1期5-7,32,共4页Corrosion & Protection In Petrochemical Industry

基　　金：国家自然科学基金资助项目(51276131)

摘　　要：以乙二醇为冷却液,设置冷却系统的温度为25℃和50℃,工作压力为4 MPa和8 MPa,研究了不同温度、不同压力下系统中316L和304不锈钢的腐蚀行为。研究结果表明:温度和压力对冷却系统中不锈钢的腐蚀均有影响,随着温度的升高和压力的增大,不锈钢腐蚀更严重;相同条件下,304不锈钢的腐蚀速率比316L不锈钢更高,同时由于不锈钢的氧化作用使得试验后的冷却液颜色变浅。冷却系统中的不锈钢腐蚀是一个复杂而又缓慢的过程,温度、压力及水分等因素对腐蚀均有影响。Corrosion characteristics of 316 L and 304 stainless steel at different temperatures and pressures were studied by using ethylene glycol as coolant. The temperature of cooling system was set at 25 ℃ and 50 ℃, while the working pressure was 4 MPa and 8 MPa, respectively. The results showed that the corrosion of stainless steel in cooling system was influenced by both temperature and pressure. With the increase of temperature and pressure, the corrosion became more severe. Under the same condition, the corrosion rate of 304 stainless steel was higher than that of 316 L stainless steel. Meanwhile, the oxidation of stainless steel made the color of the coolant become lighter. The corrosion of stainless steel in cooling system was a complicated and slow process, which was the comprehensive effect of temperature, pressure, moisture and other factors.

关 键 词：冷却液 冷却系统 不锈钢 腐蚀 温度 压力 

分 类 号：TG178[金属学及工艺—金属表面处理]