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Article

The Effect of the Formation of Superelastic NiTi Phase on Static and Dynamic Corrosion Performance of Ni-P Coating

Department of Mechanical Engineering, Dalhousie University, Halifax, NS B3J 2X4, Canada
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Author to whom correspondence should be addressed.
Academic Editor: Francisco J. G. Silva
Solids 2021, 2(3), 278-292; https://doi.org/10.3390/solids2030018
Received: 9 May 2021 / Revised: 24 July 2021 / Accepted: 28 July 2021 / Published: 2 August 2021
(This article belongs to the Special Issue Feature Papers of Solids 2021)
The addition of superelastic NiTi particles is a great benefit to the toughness of the Ni-P coating. Nonetheless, NiTi nanopowder costs 10 times more than Ti nanopowder. Therefore, in the present study, to reduce the cost, Ni-P-NiTi composite coatings were prepared on AISI 1018 steel substrates by the electroless incorporation of Ti nanoparticles into Ni-P followed by the annealing of Ni-P-Ti coatings. The effect of the formation of a superelastic NiTi phase on static and dynamic corrosion performance was investigated. It was found that the annealed Ni-P-Ti coating (i.e., Ni-P-NiTi coating) has much higher static corrosion resistance than the as-deposited Ni-P coating. The dynamic corrosion rates in the absence of abrasive particles are 10 times higher than the static corrosion rates of the coatings. The dynamic corrosion rates in the presence of abrasive particles are one order of magnitude higher than the dynamic corrosion rates in the absence of abrasive particles. The formation of a superelastic NiTi phase considerably improved the static and dynamic corrosion performance of the Ni-P coating. In the absence of abrasive particles under flowing condition, the dynamic corrosion resistance of the annealed Ni-P-Ti coating (i.e., Ni-P-NiTi coating) is 19 times higher than that of the as-deposited Ni-P coating. In the most aggressive environment (in the presence of abrasive particles), the dynamic corrosion resistance of the annealed Ni-P-Ti coating (i.e., Ni-P-NiTi coating) is four times higher than that of the as-deposited Ni-P coating. The annealed Ni-P-Ti coating (i.e., Ni-P-NiTi coating) can be used in applications where high corrosion resistance is required, especially in an extremely aggressive environment. View Full-Text
Keywords: Ni-P-NiTi composite coating; superelastic NiTi; static corrosion; dynamic corrosion Ni-P-NiTi composite coating; superelastic NiTi; static corrosion; dynamic corrosion
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MDPI and ACS Style

Li, Z.; Farhat, Z. The Effect of the Formation of Superelastic NiTi Phase on Static and Dynamic Corrosion Performance of Ni-P Coating. Solids 2021, 2, 278-292. https://doi.org/10.3390/solids2030018

AMA Style

Li Z, Farhat Z. The Effect of the Formation of Superelastic NiTi Phase on Static and Dynamic Corrosion Performance of Ni-P Coating. Solids. 2021; 2(3):278-292. https://doi.org/10.3390/solids2030018

Chicago/Turabian Style

Li, Zhi, and Zoheir Farhat. 2021. "The Effect of the Formation of Superelastic NiTi Phase on Static and Dynamic Corrosion Performance of Ni-P Coating" Solids 2, no. 3: 278-292. https://doi.org/10.3390/solids2030018

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