摘要
通过热喷涂的方法制备了添加稀土组分和适量铜组元的RE-Fe基合金涂层。采用液态浸渍法、电化学测试、盐雾实验以及涂层表面腐蚀形貌SEM观察等方法对不同成分、不同喷后处理工艺的RE-Fe基合金涂层的耐腐蚀性能进行研究。结果表明:添加适量的稀土组分和铜组元,使Fe基合金涂层的自腐蚀电位正移,维钝电流密度和致钝电流密度下降,明显地提高了Fe基合金(Fe-Cr-Ni-B-Si)涂层在酸类腐蚀介质中的耐腐蚀性能;同时也有效地提高了涂层抗盐雾气氛腐蚀的能力;其中以添加2%RE氧化物(质量分数)涂层(封孔后)的综合效果最佳。
Through adding different kinds of rare earth（RE） compositions and moderate amount of copper constituent , RE-Fe based alloy coatings were prepared by thermal spraying（THSP）. The corrosion resistance of RE-Fe based alloy coatings with different compositions and post-spraying treatments were investigated systematically by maceration corrosion test, electrochemical test, NSS test and scanning electron microscopy. The results show that the addition of moderate amount of rare-earth compositions and copper constituent can increase remarkably the corrosion resistance of iron-based alloy （Fe-Cr-Ni-B-Si） coating in the acid and salt corrosion media, and the coating with 2% RE oxide composition （mass fraction） possesses the best comprehensive effects.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2006年第1期94-99,共6页
The Chinese Journal of Nonferrous Metals
基金
福建省属高等院校测试基金资助项目(980029)
关键词
铁基合金涂层
耐腐蚀性能
热喷涂
稀土
iron-based alloy coating
corrosion resistance
thermal spraying
rare earths
