Wear and corrosion characteristics of electroless Ni–W–P–B4C and Ni–P–B4C coatings. (September 2014)

• Record Type: Journal Article
• Authors: Araghi, A.; Paydar, M. H.
• Is Part Of: Tribology. Volume 8:Number 3(2014:Sep.)
• Page Start: 146
• Page End: 153
• Publication Date: 2014-09
• Subjects: Tribology -- Periodicals; 621.8905
• DOI: 10.1179/1751584X14Y.0000000061
• Languages: English
• ISSNs: 1751-5831

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>In this study, the microhardness, wear and corrosion resistance of electroless deposited Ni–W–P–B₄C, Ni–P–B₄C, Ni–W–P and Ni–P coatings on AZ91D magnesium alloy were investigated. The hardness of the Ni–W–P–B₄C and Ni–P–B₄C composite coatings was more than that of the Ni–P and Ni–W–P coatings. The Pin on disk wear test results showed that the Ni–W–P–B₄C and Ni–P–B₄C composite coatings have a better wear resistance in comparison to the Ni–W–P and Ni–P coatings. The worn surfaces exhibited a change in the wear mechanism from adhesive for the Ni–P coating to abrasive for the Ni–W–P and Ni–W–P–B₄C coatings and combination of adhesive and abrasive for the Ni–P–B₄C composite coating. Tafel test has been used to assess corrosion performance of the specimens; the Ni–W–P coatings exhibited the best corrosion resistance while the Ni–W–P–B₄C and Ni–P–B⁴C composite coatings showed less corrosion performance than the Ni–W–P and Ni–P coatings respectively.</p> </abstract>