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Effect of SiC particle size and heat-treatment on microhardness and corrosion resistance of NiP electrodeposited coatings
Jonkoping Univ, Sweden.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten.
Jonkoping Univ, Sweden; RISE Res Inst Sweden, Sweden.
Jonkoping Univ, Sweden.
2018 (engelsk)Inngår i: Journal of Alloys and Compounds, ISSN 0925-8388, E-ISSN 1873-4669, Vol. 769, s. 1080-1087Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Electrodeposition of NiP composite coatings with nano and sub-micron sized SiC has been carried out to investigate the possibility of replacing hard chromium coatings. The composition and structure of the coatings were evaluated by energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) analysis, respectively. Microhardness was measured by Vickers indentation and polarization measurements were carried out to study the corrosion behavior of the coatings. The results showed that submicron particles can be codeposited with a higher content as compared to nano sized ones. However, even if a smaller amount of the nano-sized SiC particles are incorporated in the coating, the contribution to an increasing microhardness was comparable with the submicron sized particles, which can be related to the higher density of codeposited particles. SiC particles did not change the anodic polarization behavior of NiP coatings in a 3.5% NaCl solution. Finally, the effect of heat-treatment on the coatings properties at 400 degrees C for 1 h was studied to investigate the contribution of particles and heat-treatment on hardness and corrosion properties. It was found that the heat-treatment doubled the microhardness and changed the anodic polarization behavior of the coatings from passive to active with respect to the asplated conditions. (C) 2018 Elsevier B.V. All rights reserved.

sted, utgiver, år, opplag, sider
ELSEVIER SCIENCE SA , 2018. Vol. 769, s. 1080-1087
Emneord [en]
Electrodeposition; NiP; SiC; Microhardness; Polarization; Heat-treatment
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-152801DOI: 10.1016/j.jallcom.2018.08.013ISI: 000449481200126OAI: oai:DiVA.org:liu-152801DiVA, id: diva2:1265299
Merknad

Funding Agencies|European Union [686135]

Tilgjengelig fra: 2018-11-22 Laget: 2018-11-22 Sist oppdatert: 2018-11-22

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