Corrosion and wear behaviour of ZrO2 modified NiTi coatings on AISI 316 stainless steel

Masego L. Lepule; Babatunde A. Obadele; Anthony Andrews; Peter A. Olubambi

doi:10.1016/j.surfcoat.2014.11.072

Corrosion and wear behaviour of ZrO₂ modified NiTi coatings on AISI 316 stainless steel

Masego L. Lepule, Babatunde A. Obadele, Anthony Andrews, Peter A. Olubambi

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

To study the effect of ZrO₂ on the corrosion and wear behaviour of NiTi adaptive coatings, AISI 316 stainless steel samples were laser coated with NiTi-ZrO₂ admixed powders. The corrosion behaviour of the composite coatings was studied in 1M H₂SO₄ using polarisation methods. Both dry and wet wear tests were conducted on composite coatings at different sliding loads using pin-on-disc tribometer setup. The corrosion resistance of the laser coatings depended strongly on the chemical composition and microstructure. The results showed an increase in the corrosion rate, as ZrO₂ content increased. Dry wear rate improved, whilst wet wear rate decreased with increased ZrO₂ content.

Original language	English
Pages (from-to)	21-27
Number of pages	7
Journal	Surface and Coatings Technology
Volume	261
DOIs	https://doi.org/10.1016/j.surfcoat.2014.11.072
Publication status	Published - 15 Jan 2015
Externally published	Yes

Keywords

Corrosion
Laser coatings
NiTi
Wear
ZrO

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.surfcoat.2014.11.072

Cite this

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title = "Corrosion and wear behaviour of ZrO2 modified NiTi coatings on AISI 316 stainless steel",

abstract = "To study the effect of ZrO2 on the corrosion and wear behaviour of NiTi adaptive coatings, AISI 316 stainless steel samples were laser coated with NiTi-ZrO2 admixed powders. The corrosion behaviour of the composite coatings was studied in 1M H2SO4 using polarisation methods. Both dry and wet wear tests were conducted on composite coatings at different sliding loads using pin-on-disc tribometer setup. The corrosion resistance of the laser coatings depended strongly on the chemical composition and microstructure. The results showed an increase in the corrosion rate, as ZrO2 content increased. Dry wear rate improved, whilst wet wear rate decreased with increased ZrO2 content.",

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AU - Lepule, Masego L.

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AU - Olubambi, Peter A.

PY - 2015/1/15

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AB - To study the effect of ZrO2 on the corrosion and wear behaviour of NiTi adaptive coatings, AISI 316 stainless steel samples were laser coated with NiTi-ZrO2 admixed powders. The corrosion behaviour of the composite coatings was studied in 1M H2SO4 using polarisation methods. Both dry and wet wear tests were conducted on composite coatings at different sliding loads using pin-on-disc tribometer setup. The corrosion resistance of the laser coatings depended strongly on the chemical composition and microstructure. The results showed an increase in the corrosion rate, as ZrO2 content increased. Dry wear rate improved, whilst wet wear rate decreased with increased ZrO2 content.

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