Study of Electroless Nickel Coatings on EN-GJS-500-7 Spheroidal Graphite Cast Iron
| Autor: | G. Berthomé, Yves Wouters, Igor Forestier |
|---|---|
| Přispěvatelé: | Science et Ingénierie des Matériaux et Procédés (SIMaP ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
020209 energy 02 engineering and technology engineering.material Kinetic energy Electrochemistry Electroless nickel chemistry.chemical_compound Coating 0202 electrical engineering electronic engineering information engineering Materials Chemistry Graphite nickel-phosphorus Hypophosphite covering coatings Surfaces and Interfaces electroless nickel 021001 nanoscience & nanotechnology Surfaces Coatings and Films chemistry Chemical engineering Homogeneous lcsh:TA1-2040 engineering [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Cast iron 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) |
| Zdroj: | Coatings, Vol 8, Iss 7, p 239 (2018) Coatings Coatings, 2018, 8 (7), ⟨10.3390/coatings8070239⟩ Volume 8 Issue 7 |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings8070239⟩ |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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