晶粒尺寸对Corten-B型耐候钢耐大气腐蚀性能的影响  

Effect of Grain Size on the Corrosion Resistance of Corten-B Weathering Steel

作　　者：姜鹏飞[1,2] 汪兵[2] 刘清友[2] 施哲[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093 [2]钢铁研究总院结构材料研究所,北京100081

出　　处：《钢铁》2009年第12期67-70,共4页Iron and Steel

基　　金：973国家重点基础研究项目"提高钢铁材料质量和使用寿命的冶金学基础研究"资助项目(2004cb619101)

摘　　要：采用相同轧制工艺及不同热处理方法制备了化学成分相同而晶粒尺寸不同的3种Corten-B耐候钢试样。运用金相、周浸、锈层横截面SEM微观分析、交流阻抗测试等手段对晶粒尺寸与Corten-B型耐候钢耐工业环境下大气腐蚀性能之间的规律进行了研究。结果表明:Corten-B耐候钢晶粒尺寸从30μm减小到4μm,周浸加速腐蚀试验后锈层中裂纹和空洞的数量相应减少,腐蚀速率减小,锈层电阻Rr和反应电阻Rt增大,耐大气腐蚀性能得到提高。Three kinds of Corten-B weathering steels of different grain size with the same chemical composition were prepared by different rolling and heat treat process.The relationship between grain size and atmospheric corrosion resistance of Corten-B weathering steels in industrial atmospheric environment has been investigated by optical microscope,cyclic immersion corrosion test,micro-analysis of rust and electrochemical test.The results show that as the grain size of Corten-B weathering steel decreases from 30 μm to 4 μm, the crack and cavity in the rust after cycle immersion corrosion test decrease, the corrosion rate decreases, rust resistance Rr and corrosion reaction resistance Rt increase, the atmospheric resistance is improved.

关 键 词：Corten-B耐候钢 晶粒尺寸 周浸 耐大气腐蚀 

分 类 号：TG174.3[金属学及工艺—金属表面处理]