Studies on the influence of corrosion and wear resistant SnS coatings on Aluminum 6061 alloy

• K. Shanmugapriya, D. Rajagopal and S. Karthikeyan

Department of chemistry, SAS, Vellore Institute of Technology, Vellore, 632 014, India

Abstract: The impact of electroless Ni-P-SnS coatings on Al 6061 alloy was studied in this work. Tin (II) sulfide was added to the Ni-P matrix using the electroless deposition technique. The tin sulfide particles added increased the Ni-P coatings on Al 6061’s hardness and corrosion resistance. Intermetallic phases formed in the coatings in a manner that was shown by XRD measurements. Both the hard tin sulfide particles and the Ni₃P phases present in the coatings matrix attributed for the harder material value of coatings comprising Ni – 8.87% P – 7.62% SnS. Wear resistance of Ni – 8.87% P – 7.62% SnS is higher than that of Ni – 10.84% P – 0% SnS, indicating that SnS particles in the coatings are the reason for the better outcomes. The incorporation of SnS particles in the Ni-P matrix was found to increase the roughness of coated surfaces. Al 6061 alloy with annealed SnS incorporation and electroless Ni-P coatings has superior corrosion resistance than Al 6061 alloy with 3.5% NaCl, as is well demonstrated. The electroless Ni-P-SnS coatings produced on Al 6061 were shown to have lower coefficients of friction than Ni-P coatings under difficult sliding conditions. The wear resistances of the coatings have improved after the heat treatment procedure. The Ni-P-SnS coatings are said to be capable of serving as solid lubricants for the sliding components of machinery employed in the electronic sectors.

Keywords: wear, composites, lubricants, coatings, corrosion

Int. J. Corros. Scale Inhib., 2023, 12, no. 2, 783-792
doi: 10.17675/2305-6894-2023-12-2-22

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