Abstract
Amorphous Ni-P coatings with 7.8 wt% P were electrodeposited successfully from an electrolytic bath containing 15 g/L H3PO3. Its microstructure evolution by heat treatment and erosion-corrosion resistance are investigated in this paper. From room temperature to 500 °C, there were three exothermic crystalline phases of Ni5P2, Ni3P and Ni precipitated from the amorphous base. The microstructure evolution of the amorphous Ni-P deposits follows the sequence of amorphous, amorphous-noncrystalline, (Ni5P2 + Ni3P), then (Ni5P2 + Ni3P + Ni) with increasing heat treatment temperature. The mass loss rate of amorphous Ni-P coatings is approximately 14 mg/h and the synergism of erosion-corrosion was larger than half of the total mass loss at an impingement velocity of 8.37 m/s under saline-sand slurry. The erosion-corrosion resistance of amorphous Ni-P coatings can be enhanced obviously by heat treatment because of the elevated hardness and corrosion resistance.
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References
Y. Zhou, G. Zhao, and H. Zhang, Trans. Nonferrous Met. Soc. China 21, 1407 (2011).
Y. Yang and Y. F. Cheng, Surf. Coat. Technol. 205, 3198 (2011).
H. Huang, S. Chung, S. Pan, and W. Tsai, C. Lin, Surf. Coat. Technol. 205, 2097 (2010).
K. Hou, M. Jeng, and M. Ger, Wear 262, 833 (2007).
D. B. Lewis and G. W. Marshall, Surf. Coat. Technol. 78, 150 (1996).
E. Bredael, B. Blanpain, J. P. Celis, and J. R. Roos, J. Electrochem. Soc. 141, 294 (1994).
K. G. Keong, W. Sha, and S. Malinov, J. Alloys Compd. 334, 192 (2002).
J. C. Huang, J. P. Chu, and J. S. C. Jang, Intermetallics 17, 973 (2009).
A. H. Whitehead, H. Simunkova, P. Lammel, J. Wosik, N. Zhang, and B. Gollas, Wear 270, 695 (2011).
X. Yuan, D. Sun, H. Yu, and H. Meng, Appl. Surf. Sci. 255, 3613 (2009).
C. S. Lin, C. Y. Lee, F. J. Chen, and W. C. Li, J. Electrochem. Soc. 152, C370 (2005).
Y. Zheng, Z. Yao, X. Wei, and W. Ke, Wear 186–187, 555 (1995).
D. López, J. P. Congote, J. R. Cano, A. Toro, and A. P. Tschiptschin, Wear 259, 118 (2005).
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Ji, X., Jiang, S., Li, H. et al. Microstructure evolution and erosion-corrosion resistance of amorphous Ni-P coatings. Met. Mater. Int. 18, 655–660 (2012). https://doi.org/10.1007/s12540-012-4013-z
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DOI: https://doi.org/10.1007/s12540-012-4013-z