INFLUENCE OF CURRENT DENSITY ON THE CHARACTERISTICS OF NI-CR ALLOY COATINGS

  • E. AIDAOUI Laboratoire de Physique des Couches Minces et Applications Université de Biskra, BP 145 RP 07000 Biskra
  • H. BEN TAMAM Laboratoire de Physique des Couches Minces et Applications Université de Biskra, BP 145 RP 07000 Biskra
  • E. GUETTAF TAMAM Laboratoire Electronique des Systèmes et Stockage de l’Energie (ESSE) UDES, Route Nationale N°11, BP 386, Bou-Ismail, 42415, Wilaya de Tipaza.

Résumé

In the present study, Ni-Cr alloy coatings were electrodeposited on pretreated Cu substrates, from a citrate bath containing chromium sulfate salt. In order to study the effect of applied current density, Ni-Cr alloy coatings were electrodeposited at 1, 3, 5 and 8 A/dm². The characteristics of the coatings were assessed by X-ray diffraction (XRD) and microhardness tests. The corrosion results were calculated from polarization Tafel lines. XRD analyses of elaborated coatings at different applied current densities indicate the formation of NiCr and Cr3Ni2 phases. The co-deposition of chromium in Ni matrix improved the microhardness and the corrosion behavior.

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Publiée
2017-02-06
Comment citer
AIDAOUI, E.; BEN TAMAM, H.; GUETTAF TAMAM, E.. INFLUENCE OF CURRENT DENSITY ON THE CHARACTERISTICS OF NI-CR ALLOY COATINGS. Courrier du Savoir, [S.l.], v. 22, fév. 2017. ISSN 1112-3338. Disponible à l'adresse : >http://revues.univ-biskra.dz/index.php/cds/article/view/1922>. Date de consultation : 29 juin 2017