Morphology and composition of Zn–Ni alloy obtained from sulphate bath containing complexing agent. (3rd May 2020)

• Record Type: Journal Article
• Authors: Faid, H.; Galvan, J. C.
• Is Part Of: Transactions of the Institute of Metal Finishing. Volume 98:Number 3(2020)
• Page Start: 138
• Page End: 143
• Publication Date: 2020-05-03
• Subjects: Zn–Ni alloys -- electrodeposition -- EDTA -- morphology -- corrosion resistance; Metals -- Finishing -- Periodicals; Metals -- Surfaces -- Periodicals; Metallurgy -- Periodicals; 671.705
• DOI: 10.1080/00202967.2020.1749425
• Languages: English
• ISSNs: 0020-2967

Abstract

ABSTRACT: Zn–Ni alloys were electrodeposited on stainless steel from a sulphate bath in the presence of EDTA (ethylenediaminetetraacetic acid) as a complexing agent. The electrochemical behaviour of the bath was studied by cyclic voltammetry (CV), chronoamperometry (CA). Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis showed a change in surface morphology; the phase structure corresponds to the face centre cubic (fcc) structure attributed to the γ phase (Ni5 Zn21 ). The corrosion measurements of the obtained deposits with various EDTA concentrations were studied using potentiodynamic polarisation. Results showed that the deposit obtained in the presence of a low EDTA concentration (0.25 g L −1 ) exhibits better corrosion resistance.