高湿热海洋大气环境下温度和湿度对Q345钢耐蚀性能的影响  

Effects of Temperature and Humidity on Corrosion Resistance of Q345 Steel under High Temperature and Humidity Marine Atmosphere

作　　者：葛秋辰 汪兵[2] 刘清友[2] 甘国友[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093 [2]钢铁研究总院工程用钢研究所,北京100081

出　　处：《机械工程材料》2017年第8期49-53,共5页Materials For Mechanical Engineering

基　　金：国家重大基础研究"973"计划项目(2014CB643300)

摘　　要：利用周浸腐蚀试验、扫描电镜观察、X射线衍射分析等方法研究了在模拟高湿热海洋大气环境中NaCl溶液温度(35~55℃)和相对湿度(60%~80%)对Q345钢耐蚀性能的影响。结果表明:随着溶液温度的升高,试验钢的腐蚀速率增大且温度越高增大速率越快,表面锈层厚度增大且锈层中的孔洞变大,腐蚀产物Fe_3O_4的含量增多;随相对湿度的增加,试验钢的腐蚀速率增大,锈层也越来越厚,锈层中的物相组成变化较小。The influence of NaCl solution temperature（35-55 ℃）and relative humidity（60%-80%）on corrosion resistance of Q345 steel under simulated high temperature and humidity marine atmosphere was investigated by wet/dry cyclic test,scanning electron microscopy,X-ray diffraction,etc.The results show that with the increase of solution temperature,the corrosion rate of tested steel increased and had a relatively high increasing rate at a relatively high temperature;the thickness of the surface rust layer increased and the hole inside the layer became larger;the content of the Fe3O4 corrosion product also increased.With the increase of relative humidity,the corrosion rate of the tested steel increased,the rust layer became thicker and thicker while the phase composition of the rust layer changed very little.

关 键 词：海洋大气 Q345钢 溶液温度 相对湿度 耐腐蚀性能 

分 类 号：TG111.92[金属学及工艺—物理冶金]