Optimizing Heat Treatment for Electroplated NiP and NiP/SiC Coatings
NiP (P > 10 wt.%) coatings are amorphous coatings whose structure can be transformed by heat treatment into a crystalline structure and hardened by precipitation of Ni<sub>3</sub>P. In this study, NiP coatings and composite ones with SiC nanoparticles were produced by electrodepositio...
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doaj-bdcbca36704f42bab4b9a4c0511365892020-12-02T00:02:21ZengMDPI AGCoatings2079-64122020-12-01101179117910.3390/coatings10121179Optimizing Heat Treatment for Electroplated NiP and NiP/SiC CoatingsDonya Ahmadkhaniha0Fredrik Eriksson1Caterina Zanella2Department of Material and Manufacturing, School of Engineering, Jönköping University, P.O. Box 1026, Gjuterigatan 5, SE-551 11 Jönköping, SwedenDepartment of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, SwedenDepartment of Material and Manufacturing, School of Engineering, Jönköping University, P.O. Box 1026, Gjuterigatan 5, SE-551 11 Jönköping, SwedenNiP (P > 10 wt.%) coatings are amorphous coatings whose structure can be transformed by heat treatment into a crystalline structure and hardened by precipitation of Ni<sub>3</sub>P. In this study, NiP coatings and composite ones with SiC nanoparticles were produced by electrodeposition, and their structural transformation by heat treatment was studied using differential scanning calorimetry (DSC) and X-ray diffraction (XRD). The microhardness and the scratch and corrosion resistance of the coatings were evaluated and compared before and after different heat treatments. The results showed that in as-plated condition, the addition of SiC particles in the coatings did not modify the microstructure, microhardness, or electrochemical behavior. However, the SiC particles’ role was disclosed in combination with heat treatment. Composite coatings that were heat treated at 300 °C had higher microhardness and scratch resistance than the pure NiP one. In addition, composite coatings maintained their scratch resistance up to 400 °C, while in the case of the NiP ones, there was a reduction in scratch resistance by heating at 400 °C. It was also concluded that heating temperature has the main role in hardness and corrosion resistance of NiP and composite coatings, rather than heating time. The optimum heat-treatment protocol was found to be heating at 360 °C for 2 h, which resulted in a maximum microhardness of about 1500 HV<sub>0.02</sub> for NiP and its composite coating without sacrificing the corrosion resistance.https://www.mdpi.com/2079-6412/10/12/1179NiP/SiC coatingheat treatmentelectroplatinghardnessmicro-scratchcorrosion resistance |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Donya Ahmadkhaniha Fredrik Eriksson Caterina Zanella |
spellingShingle |
Donya Ahmadkhaniha Fredrik Eriksson Caterina Zanella Optimizing Heat Treatment for Electroplated NiP and NiP/SiC Coatings Coatings NiP/SiC coating heat treatment electroplating hardness micro-scratch corrosion resistance |
author_facet |
Donya Ahmadkhaniha Fredrik Eriksson Caterina Zanella |
author_sort |
Donya Ahmadkhaniha |
title |
Optimizing Heat Treatment for Electroplated NiP and NiP/SiC Coatings |
title_short |
Optimizing Heat Treatment for Electroplated NiP and NiP/SiC Coatings |
title_full |
Optimizing Heat Treatment for Electroplated NiP and NiP/SiC Coatings |
title_fullStr |
Optimizing Heat Treatment for Electroplated NiP and NiP/SiC Coatings |
title_full_unstemmed |
Optimizing Heat Treatment for Electroplated NiP and NiP/SiC Coatings |
title_sort |
optimizing heat treatment for electroplated nip and nip/sic coatings |
publisher |
MDPI AG |
series |
Coatings |
issn |
2079-6412 |
publishDate |
2020-12-01 |
description |
NiP (P > 10 wt.%) coatings are amorphous coatings whose structure can be transformed by heat treatment into a crystalline structure and hardened by precipitation of Ni<sub>3</sub>P. In this study, NiP coatings and composite ones with SiC nanoparticles were produced by electrodeposition, and their structural transformation by heat treatment was studied using differential scanning calorimetry (DSC) and X-ray diffraction (XRD). The microhardness and the scratch and corrosion resistance of the coatings were evaluated and compared before and after different heat treatments. The results showed that in as-plated condition, the addition of SiC particles in the coatings did not modify the microstructure, microhardness, or electrochemical behavior. However, the SiC particles’ role was disclosed in combination with heat treatment. Composite coatings that were heat treated at 300 °C had higher microhardness and scratch resistance than the pure NiP one. In addition, composite coatings maintained their scratch resistance up to 400 °C, while in the case of the NiP ones, there was a reduction in scratch resistance by heating at 400 °C. It was also concluded that heating temperature has the main role in hardness and corrosion resistance of NiP and composite coatings, rather than heating time. The optimum heat-treatment protocol was found to be heating at 360 °C for 2 h, which resulted in a maximum microhardness of about 1500 HV<sub>0.02</sub> for NiP and its composite coating without sacrificing the corrosion resistance. |
topic |
NiP/SiC coating heat treatment electroplating hardness micro-scratch corrosion resistance |
url |
https://www.mdpi.com/2079-6412/10/12/1179 |
work_keys_str_mv |
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