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Title: Electrochemical behaviour of ternary Ni-Zn-P thin films deposition on steel substrate
Authors: Popescu, Ana-Maria
Soare, Vasile
Burada, Marian
Mitrică, Dumitru
Constantin, Ionuţ
Bădiliţă, Viorel
Minculescu, Florin
Cotruţ, Cosmin
Neacsu, Elena Ionela
Donath, Cristina
Constantin, Virgil
Keywords: Corrosion;Thin films;Ni-Zn-P;Electrodeposition;Sulphate;Corrosion test
Issue Date: Nov-2018
Publisher: NISCAIR-CSIR, India
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 ZnSO4·7H2O 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%.
Page(s): 572-577
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.25(6) [November 2018]

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