CLAM钢表面Fe-Al/Al_(2)O_(3)涂层的制备及其耐腐蚀性能研究  

Preparation of Fe-Al/Al_(2)O_(3) coating on CLAM steel surface and study on its corrosion resistance

作　　者：邵宗明 杨浩 柳伟平 郑明杰 SHAO Zong-ming;YANG Hao;LIU Wei-ping;ZHENG Ming-jie(Institute of Nuclear Energy Safety Technology,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China;Jihua Laboratory,Foshan 528200,China)

机构地区：[1]中国科学院合肥物质科学研究院核能安全技术研究所,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026 [3]季华实验室,广东佛山528200

出　　处：《现代化工》2023年第8期149-155,共7页Modern Chemical Industry

基　　金：国家磁约束核聚变能发展研究专项(2018YFE0313400);广东省基础与应用基础研究基金联合基金-青年基金项目(2020A1515110713)。

摘　　要：采用热浸镀及热扩散工艺在中国低活化马氏体钢(CLAM)表面制备出一层FeAl合金层,通过氧化处理成功地在CLAM表面制备出一层致密的氧化涂层。利用高分辨透射电镜分析了表面生长的氧化层为单一的氧化铝涂层。利用场发射扫描电镜(FESEM)及能量散射谱仪(EDS)分析了不同氧化工艺对于涂层结构及组成的影响。通过电化学阻抗谱测试分析不同氧化条件下制备的样品的耐腐蚀性能。结果表明,750℃下氧化4 h制备的涂层耐腐蚀性能最佳,其极化电阻值为8 059.54Ω·cm^(2),有效孔隙率为0.142 87。A Fe-Al alloy topcoat is prepared on the surface of China Low Activation Martensitic(CLAM)steel through a hot-dipping aluminizing method and a thermal diffusion process.Subsequently,a dense oxide coating is successfully formed on the surface of CALM by oxidation treatment.It is indicated through high resolution transmission electron microscopy(HRTEM)that the oxide layer grown on the surface of CALM is pure Al2O3.The effects of different oxidation processes on the structure and composition of the coating are characterized by means of field emission scanning electron microscopy(FESEM)and energy dispersive X-ray spectroscopy(EDS).The corrosion resistance of the samples prepared under different oxidation conditions is analyzed by means of electrochemical impedance spectroscopy test.Results show that the coating prepared by oxidation at 750℃for 4 h has the best corrosion resistance,with a highest polarization resistance of 8059.54Ω·cm^(2) and a lower effective porosity of 0.14287.

关 键 词：CLAM Al_(2)O_(3) 热浸铝 耐腐蚀涂层 阻氚涂层 

分 类 号：TB37[一般工业技术—材料科学与工程]