(1. 福州大學 材料科學與工程學院， 福州 350002;
2. 福州大學 機械工程及自動化學院， 福州 350002)
摘 要: 通過熱噴涂的方法制備了添加稀土組分和適量銅組元的RE-Fe基合金涂層。 采用液態(tài)浸漬法、 電化學測試、 鹽霧實驗以及涂層表面腐蝕形貌SEM觀察等方法對不同成分、 不同噴后處理工藝的RE-Fe基合金涂層的耐腐蝕性能進行研究。 結果表明： 添加適量的稀土組分和銅組元， 使Fe基合金涂層的自腐蝕電位正移， 維鈍電流密度和致鈍電流密度下降， 明顯地提高了Fe基合金(Fe-Cr-Ni-B-Si)涂層在酸類腐蝕介質(zhì)中的耐腐蝕性能； 同時也有效地提高了涂層抗鹽霧氣氛腐蝕的能力； 其中以添加2% RE氧化物(質(zhì)量分數(shù)) 涂層(封孔后)的綜合效果最佳。
關鍵字: 鐵基合金涂層； 耐腐蝕性能； 熱噴涂； 稀土
（ 1. College of Materials Science and Engineering,
Fuzhou University, Fuzhou 350002, China;
2. College of Mechanical Engineering, Fuzhou University, Fuzhou 350002, China）
Abstract: 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.
Key words: iron-based alloy coating; corrosion resistance; thermal spraying; rare earths
