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Effect of Heat Treatment on Erosion-Corrosion Behavior of Electroless Ni-P Coatings in Saline Water
B. Jiang; S. L. Jiang; A. L. Ma; Y. G. Zheng
2013
Source PublicationMaterials and Manufacturing Processes
ISSN1042-6914
Volume29Issue:1Pages:74-82
AbstractTo prevent premature failure of heat exchanger tubes enduring rapid seawater flow, amorphous electroless Ni-P coatings were prepared on copper-nickel alloy (CuNi 90/10) substrates. The influence of post-deposition vacuum heat treatment at different annealing temperatures (190, 300, 400, 500, and 600 degrees C) on the erosion-corrosion resistance of the annealed coatings was examined by X-ray diffraction, scanning electron microscopy, potentiodynamic polarization, and electrochemical impedance spectroscopy. It was found that precipitation of a crystalline phase took place in the coating matrix at 400 degrees C. The highest microhardness was achieved for coatings undergoing heat treatment at 400 degrees C due to the formation of the stable Ni3P phase. Electrochemical results indicated that all the Ni-P coatings present passivity and better corrosion resistance than the uncoated CuNi 90/10 substrate. The Ni-P coating treated at 500 degrees C demonstrated the best erosion-corrosion resistance, which represented the optimization of the balance between erosion and corrosion resistance.
description.department[jiang, b. ; jiang, s. l. ; ma, a. l. ; zheng, y. g.] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; jiang, sl (reprint author), chinese acad sci, inst met res, state key lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china. ; sljiang@imr.ac.cr ; ygzheng@imr.ac.cn
KeywordAmorphous Coatings Corrosion Cuni 90/10 Erosion Heat Treatment Microstructure Ni-p Plating Electrochemical-behavior Magnesium Alloy Nacl Solutions Copper-alloys Seawater Resistance Microstructure Phosphorus Surface Cu
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Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72482
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
B. Jiang,S. L. Jiang,A. L. Ma,et al. Effect of Heat Treatment on Erosion-Corrosion Behavior of Electroless Ni-P Coatings in Saline Water[J]. Materials and Manufacturing Processes,2013,29(1):74-82.
APA B. Jiang,S. L. Jiang,A. L. Ma,&Y. G. Zheng.(2013).Effect of Heat Treatment on Erosion-Corrosion Behavior of Electroless Ni-P Coatings in Saline Water.Materials and Manufacturing Processes,29(1),74-82.
MLA B. Jiang,et al."Effect of Heat Treatment on Erosion-Corrosion Behavior of Electroless Ni-P Coatings in Saline Water".Materials and Manufacturing Processes 29.1(2013):74-82.
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