Electrochemical behaviour of ternary Ni-Zn-P thin films deposition on steel substrate

Ana Maria Popescu, Vasile Soare, Marian Burada, Dumitru Mitrică, Ionut Constantin, Viorel Bădiliţă, Florin Minculescu, Cosmin Cotrut, Elena Ionela Neacsu, Cristina Donath, Virgil Constantin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Ternary Ni-Zn-P alloy thin films with a thickness of 15-20 µm are considered as a replacement for cadmium sacrificial coatings for anticorrosive protection of steel parts working in highly corrosive media. Anticorrosive Ni-Zn-P thin films has been electrochemically deposited from aqueous sulphate solutions on carbon steel substrate. The influence of bath composition (variable ZnSO 4 ·7H 2 O contents) and electrodeposition type (potentiostatic or galvanostatic) on physical-chemical and corrosion characteristics of obtained films have been studied. Films are characterized by energy dispersive analysis (EDAX) and scanning electron microscopy (SEM). The corrosion tests are performed in 3% NaCl solution with optimal resulting values of -916.2 mV vs. saturated calomel electrode (SCE) for the corrosion potential and 13.4 µA·cm -2 for the corrosion current density. The calculated value for the corrosive attack protection efficiency is 67.7%.

Original languageEnglish
Pages (from-to)572-577
Number of pages6
JournalIndian Journal of Chemical Technology
Volume25
Issue number6
Publication statusPublished - 1 Nov 2018
Externally publishedYes

Keywords

  • Corrosion
  • Corrosion test
  • Electrodeposition
  • Ni-zn-p
  • Sulphate
  • Thin films

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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  • Cite this

    Popescu, A. M., Soare, V., Burada, M., Mitrică, D., Constantin, I., Bădiliţă, V., Minculescu, F., Cotrut, C., Neacsu, E. I., Donath, C., & Constantin, V. (2018). Electrochemical behaviour of ternary Ni-Zn-P thin films deposition on steel substrate. Indian Journal of Chemical Technology, 25(6), 572-577.