稀土对碳素钢在0.3 mol/L Nacl溶液中耐蚀性能的影响  

EFFECT OF RARE EARTH ON THE CORROSION RESISTANCE OF CARBON STEEL IN 0.3 mol/L NaCl SOLUTION

作　　者：汪兵[1] 刘清友[1] 毛新平[2] 翁宇[3] 王向东[1] 贾书君[1] 董瀚[1] 

机构地区：[1]钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081 [2]广州钢铁企业集团有限公司,广州510381 [3]本溪钢铁(集团)有限责任公司,本溪117000

出　　处：《金属学报》2008年第7期863-866,共4页Acta Metallurgica Sinica

基　　金：国家重点基础研究发展计划项目2004CB619101;国家自然科学基金项目50671027资助~~

摘　　要：采用EIS、SEM及XRD等方法研究了稀土钢、碳素钢在0.3 mol/L NaCl溶液中的腐蚀行为.结果表明,稀土能够提高碳素钢的耐蚀性能,与碳素钢相比,稀土钢在溶液中生成的锈层较为致密,锈层中具有保护性作用的α-FeOOH含量较高,而活性的γ-FeOOH和β-FeOOH含量较少.分析了交流阻抗等效电路中电化学参数随时间的演变规律,对稀土提高碳素钢的耐蚀性机理进行了讨论.The corrosion processes of rare earth （RE） bearing steel and carbon steel in 0.3 mol/L NaCl solution were investigated by EIS, SEM and XRD. The results show that RE can improve the corrosion resistance of carbon steel. Compared with carbon steel, the rust layer of RE bearing steel generated in the solution is more compact, the content of α-FeOOH in rust layer with protective effect is higher, and the contents of activated γ-FeOOH and β-FeOOH are little. The evolution of electrochemistry parameters in the equivalent circuit was analyzed, and the mechanism of RE improving the corrosion resistance of steel was discussed.

关 键 词：稀土 耐候钢 电化学阻抗谱 耐蚀性能 

分 类 号：TG174[金属学及工艺—金属表面处理] TG142.1[金属学及工艺—金属学]