Indexed by:期刊论文

Date of Publication:2019-02-01

Journal:IONICS

Included Journals:SCIE、Scopus

Volume:25

Issue:2

Page Number:849-857

ISSN No.:0947-7047

Key Words:Silver; Anti-tarnish; Microstructure; Quantum chemical calculation

Abstract:The influence of microstructure on anti-tarnish ability of silver deposit was studied by computational chemistry and experiments. The influence of microstructure on the anti-tarnish ability of silver deposit was firstly predicted by quantum chemical calculations. Theoretical studies revealed that high-index crystal surfaces of silver deposits were more sensitive to corrosive mediums and were seriously damaged when they were discolored. Based on the prediction of quantum chemical calculations, silver electrodeposition process with crystal surfaces controlled by additives was possible approach to improve the anti-tarnish ability of silver deposit in this work. The anti-tarnish ability of silver deposit influenced by crystal surfaces control was studied by surface discoloration investigation and Tafel plots measurements, as well as X-ray photoelectron spectroscopy (XPS) measurements. The results of these measurements confirmed the conclusions of theoretical studies; silver electrodeposition process with microstructure control can be used to improve the anti-tarnish ability of silver deposit.