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30 μm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R_r和反应电阻R_t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 4μm,the crack and cavity in the rust after cycle immersion corrosion test decrease,the corrosion rate decreases,rust resistance R_r and corrosion reaction resistance R_t increase,the atmospheric resistance is improved.
参考文献
| [1] | WENG Y Q .Microstrueture Refinement of Structural Steel in China[J].Iron and Steel Institute of Japan International,2003,43(11):1675. |
| [2] | López H F;Cisneros M M;Maneha H .Grain Size Effects on the SCC Susceptibility of a Nitrogen Steel in Hot NaCl Solutions[J].Corrosion Science,2006,48:913. |
| [3] | Youssef K h M S;Koch C C;Fedkiw P S .Improved Corrosion Behavior of Nanaocurstalline Zinc Produced by Pulse-Current Electrodeposition[J].Corrosion Science,2004,46(01):51. |
| [4] | Osório W R;Freire C M;Garcia A .The Role of Macrostructural and Grain Size on the Corrosion Resistance of Zn and Al Castings[J].Materials Science and Engineering,2005,402(1-2):22. |
| [5] | Schino A Di;Barteri M;Kenny J M .Grain Size Dependence of Mechanical,Corrosion and Tribologieal Properties of High Nitrogen Stainless Steels[J].Journal of Materials Science,2003,38:3257. |
| [6] | V. V. Kalmykov;V. G. Razdobreev .Effect of the structure of carbon steel on its corrosion in 3& NaCl solution under alternating immersion[J].Защита Металлов,1999(6):660-662. |
| [7] | Y. Li;F. Wang;G. Liu .Grain Size Effect on the Electrochemical Corrosion Behavior of Surface Nanocrystallized Low-Carbon Steel[J].Corrosion: The Journal of Science and Engineering,2004(10):891-896. |
| [8] | 汪兵,刘清友,贾书君,王向东,卢吉,董瀚.晶粒尺寸对普碳钢耐工业环境下大气腐蚀性能的影响[J].中国腐蚀与防护学报,2007(04):193-196. |
| [9] | 杨德钧;沈卓身.金属腐蚀学[M].北京:冶金工业出版社,1999 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%