Next Article in Journal
Fabrication of Transparent Very Thin SiOx Doped Diamond-Like Carbon Films on a Glass Substrate
Previous Article in Journal
In Situ Plasma Monitoring of PECVD nc-Si:H Films and the Influence of Dilution Ratio on Structural Evolution
Open AccessFeature PaperArticle

Study of Electroless Nickel Coatings on EN-GJS-500-7 Spheroidal Graphite Cast Iron

SIMaP, Université Grenoble Alpes, CNRS, Grenoble-INP, Grenoble 38000, France
*
Author to whom correspondence should be addressed.
Coatings 2018, 8(7), 239; https://doi.org/10.3390/coatings8070239
Received: 25 May 2018 / Revised: 17 June 2018 / Accepted: 4 July 2018 / Published: 6 July 2018
  |  
PDF [6563 KB, uploaded 6 July 2018]
  |  

Abstract

EN-GJS-500-7 spheroidal graphite (SG) cast iron was coated with chemical Ni-P. The kinetic study reveals that the limiting step corresponds to a classical surface process, but the morphological study shows, at short times, an imperfect Ni-P coating on the graphite spheroids. The initial Ni-P growth appears to be blocked. This problem has been solved by the application of a cathodic polarization for a few minutes as a pretreatment of the surface. It was observed after this first step that both chemical and electrochemical reduction of nickel cation and hypophosphite on the SG cast iron took place at the same time, leading to the growth of a homogeneous Ni-P scale, in particular on graphite spheroids. View Full-Text
Keywords: covering coatings; electroless nickel; nickel-phosphorus covering coatings; electroless nickel; nickel-phosphorus
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Forestier, I.; Berthomé, G.; Wouters, Y. Study of Electroless Nickel Coatings on EN-GJS-500-7 Spheroidal Graphite Cast Iron. Coatings 2018, 8, 239.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Coatings EISSN 2079-6412 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top