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The Improvement of Hardness and Corrosion Resistance of Electroplated Pd-Ni Film on 316L Stainless Steel by CeCl3

Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
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Coatings 2020, 10(2), 161; https://doi.org/10.3390/coatings10020161
Received: 26 December 2019 / Revised: 30 January 2020 / Accepted: 6 February 2020 / Published: 10 February 2020
(This article belongs to the Special Issue Anticorrosion Protection of Nonmetallic and Metallic Coatings II)
By using the methods of XRD, SEM/EDS, electrochemical polarization, and a weight loss test, the effects of the rare earth salt CeCl3 on the adherence, hardness, porosity and corrosion resistance of an electroplated Pd-Ni film on 316L stainless steel were studied. The results showed that by adding 1.0 g L−1 CeCl3 in the plating bath, the obtained Pd-Ni film was obviously improved. The grain size was refined, and the microstructure was more compact and uniform. The film hardness and the adherence to the substrate increased, and the corrosion resistance in a 20 wt % H2SO4 solution (80 °C) obviously increased. Ce3+ increased the throwing power of the bath, which resulted in more uniform current distribution and strengthened the cathodic polarization degree during the electroplating process.
Keywords: Pd-Ni film; electroplating; CeCl3; corrosion resistance; grain size; throwing power Pd-Ni film; electroplating; CeCl3; corrosion resistance; grain size; throwing power
MDPI and ACS Style

Wang, G.; Li, D.; Zuo, Y.; Tang, Y.; Zhang, X.; Zhao, X. The Improvement of Hardness and Corrosion Resistance of Electroplated Pd-Ni Film on 316L Stainless Steel by CeCl3. Coatings 2020, 10, 161.

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