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 language | English |
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Pages (from-to) | 572-577 |
Number of pages | 6 |
Journal | Indian Journal of Chemical Technology |
Volume | 25 |
Issue number | 6 |
Publication status | Published - 1 Nov 2018 |
Externally published | Yes |
Keywords
- Corrosion
- Corrosion test
- Electrodeposition
- Ni-zn-p
- Sulphate
- Thin films
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)