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论文类型：期刊论文

发表时间：2013-05-15

发表刊物：SURFACE & COATINGS TECHNOLOGY

收录刊物：SCIE、EI

卷号：222

页面范围：25-30

ISSN号：0257-8972

关键字：Ni-Cu-P; Electroless deposition; Rare earth elements; Corrosion resistance

摘要：In this paper, the effects of Ce4+ concentration on the structure and corrosion resistance of electroless deposited Ni-Cu-P coatings were investigated using microscopy, energy dispersive X-ray spectroscopy (EDX), inductively coupled plasma atomic emission spectrometry (ICP-AES), X-ray diffraction spectrometer (XRD), polarization curve (PC) and electrochemical impedance spectroscopy (EIS). The results show that the proper addition of Ce4+ can apparently refine the grain size and make the coating surface denser and more uniform, resulting in the enhancement of corrosion resistance of Ni-Cu-P coatings in the flue gas condensate. When the Ce4+ concentration is 8 mg/L, the corrosion current density of Ni-Cu-P coating was reduced by nearly 60% as compared to that prepared without Ce4+ in the bath. However, the excessive addition of Ce4+ can degrade the homogeneity, resulting in the decrease of the corrosion resistance of Ni-Cu-P coatings. (c) 2013 Elsevier B.V. All rights reserved.