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Coating and Surface Treatment
ArticleName Structure, properties and quality of a composite nickel-phosphorus coating deposited on steel substrates of various compositions
DOI 10.17580/chm.2022.04.08
ArticleAuthor Yu. N. Goykhenberg, D. S. Polukhin
ArticleAuthorData

South Ural State University, Chelyabinsk, Russia:

Yu. N. Goykhenberg, Cand. Eng., Professor, Senior Researcher, Dept. of Materials Science and Physical Chemistry of Materials, e-mail: goikhenbergyn@susu.ru

 

Scientific and Technical Center KONAR Ltd., Chelyabinsk, Russia:
D. S. Polukhin, Executive Director, e-mail: Polukhin.dmitriy@konar.ru

Abstract

Possible causes of defects during deposition and subsequent heat treatment (HT) of nickelphosphorus (Ni – P) coatings containing dispersed silicon carbides SiC on steel sheets with a thickness of 65–180 mm are investigated. The phase composition, microstructure, and microhardness of 40–70 μm thick coatings chemically deposited on workpieces made of low- and medium-carbon low-alloy steels in various structural states and subjected to crystallization annealing of various durations were studied. According to X-ray diffraction studies, after deposition coatings are in an amorphous state and have low hardness and plasticity. Heat treatment in the temperature range of 400–450 ºC is accompanied by an increase in coating adhesion, microhardness to the required values (1000 HV) according to specifications, and a drop in elongation to zero. This is due to the crystallization with the formation of carbides SiC and Si5C3, nickel with a face-centered cubic (fcc) lattice, and nickel phosphide Ni3P. The conducted studies and the revealed regularities made it possible to choose 09G2S thick steel sheet for some articles of oil and gas equipment, to establish the technological parameters for deposition of composite Ni–P coatings and the final HT modes that do not lead to the appearance of defects in the form of surface cracks, micropores and other discontinuities. The more homogeneous and stable the substrate structure, the less defects will appear in the coating. Another reason for rejection may be due to the transition from a less dense amorphous initial state to a denser crystalline state upon heating, accompanied by a reduction in volume in combination with a drop in the relative elongation of the coating to zero.

keywords Nickel-phosphorus coating, microhardness of thin coatings, diffraction patterns, crystalline phases, coating continuity, metastable structures
References

1. Sulegin D. А., Yurasova I. I. Study of the nickel plating process using the Pourbaix diagram. Inzhenerny zhurnal: nauka i innovatsii. 2013. No. 6. pp. 1–10.
2. Aslanyan I. R., Shuster L. Sh. Wear of electrolytic Ni-P coatings during sliding friction. Moscow: VIAM, 2015. 18 p.
3. Ahmadkhaniha D., Eriksson F., Leisner P., Zanella C. Effect of SiC particle size and heat-treatment on microhardness and corrosion resistance of NiP electrodeposited coatings. Journal of Alloys and Compounds. 2018. Vol. 769. pp. 1080–1087.
4. Osama Fayyaz A., Radwan B., Mostafa H. Sliem, Abdullah A. M., Hasan A. Investigating the properties of electrodeposited of Ni – P – ZrC nanocomposite coatings. ACS Omega. 2021. Vol. 6. pp. 33310–33324.
5. Fayyaz O., Khan A., Shakoorl R. A., Hasan A., Moinuddin M. Yusuf et al. Enhancement of mechanical and corrosion resistance properties of electrodeposited Ni – P – TiC composite coatings. Scientific Reports. 2021. Vol. 11. p. 5327.
6. Anju M. Pillai, Rajendra A., Sharma A. K. Electrodeposited nickel–phosphorous (Ni – P) alloy coating: an in-depth study of its preparation, properties, and structural transitions. Journal of Coatings Technology and Research. 2012. Vol. 9. No. 6. pp. 785–797.
7. Buchtík M., Krystýnová M., Másilko J., Wasserbauer J. The effect of heat treatment on properties of Ni – P coatings deposited on a AZ91 magnesium alloy. Coatings. 2019. Vol. 9. Iss. 7. P. 461.
8. Gorbunova К. М., Nikiforova А. А. Physical and chemical bases of the process of chemical nickel plating. Moscow: AN SSSR, 1960. pp. 7–194.
9. Trejo G., Nava D., Dávalos C. E., Martínez-Hernández A. et al. Effects of heat treatment on the tribological and corrosion properties of electrodeposited Ni – P alloys. México: Center for Research and Technological Development in Electrochemistry (CIDETEQ), 2012. 12 p.
10. Skopintsev V. D. Resource- and energy-saving technologies for autocatalytic deposition of coatings based on nickel-phosphorus alloy. Dissertation … of Doctor of Engineering Sciences. Moscow: FGBOU VO «RKhTU imeni Mendeleeva», 2016. 478 p.
11. Gorbunova К. М. Deposition of metal coatings by chemical reduction. Zhurnal VKhO imeni D. I. Mendeleeva. 1980. Vol. 25. No. 2. pp. 175–188.
12. Gorbunova К. М., Ivanov М. V. Chemical methods of metal deposition (chemical nickel plating and cobalt plating): reference book. Edited by Grinberg А. М. Moscow: Metallurgiya, 1987. pp. 365–401.
13. Gamburg Yu. D. Chemical nickel plating (obtaining nickel-phosphorus coatings by electrocatalytic reduction with hypophosphite). Moscow: RAN, 2020. 82 p.
14. GOST 9.302–88. Metal and non-metal inorganic coatings. Control methods. Introduced: 01.01.1990. Moscow: Izdatelstvo standartov, 1988.
15. GOST R ISO 6507-1–2007. Metals and alloys. Vickers hardness test. Part 1. Test method. Introduced: 01.08.2008. Moscow: Standartinform, 2007.
16. Zanella C., Lekka M., Bonora P. L. Influence of the particle size on the mechanical and electrochemical behaviour of micro and nano-nickel matrix composite coatings. Journal of Applied Electrochemistry. 2009. Vol. 39. pp. 31–38.

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