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STUDY OF Ni-P AND Ni-P-PTFE COATINGS ON CARBON STEEL VIA ELECTROLESS DEPOSITION |
LIU Xuezhong, LI Chao, WANG Jianfei, TIAN Jintao, YIN Yansheng |
Institute of Materials Science and Engineering, Ocean University of China, Qingdao 266100 |
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Abstract The Ni-P and Ni-P-PTFE coatings were experimentally electroless deposited on the surface of carbon steel in the present study. The key preparing process was explored and the as-prepared coatings of Ni-P and Ni-P-PTFE were then characterized using SEM, EDS and XRD. The electrochemical polarization curves and the weight increases of the coated samples in the seawater were conducted to assess the anti-corrosion behaviors of the two coatings. The results indicated that the Ni-P and Ni-P-PTFE coatings have been successfully electroless deposited on the surface of carbon steel. The surface microstructure observations showed that the Ni-P coating was smooth and compact rather than the Ni-P-PTFE coating. Although the results from polarization curves and weight gains indicated that the Ni-P-PTFE coating had anti-corrosion behavior slightly poorer than the Ni-P coating due to the presence of the composite interface in the Ni-P-PTFE coating, the two coatings prepared in this study could provide carbon steel with valuable protection from seawater attack.
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Received: 09 April 2009
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Corresponding Authors:
TIAN Jintao
E-mail: jttian@ouc.edu.cn
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