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The effect of passivated potential on the passive films formed on pure chromium in borate buffer solution
Author(s) -
Jinlong Lv,
Tongxiang Liang
Publication year - 2017
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6190
Subject(s) - chromium , passivation , corrosion , electrochemistry , buffer (optical fiber) , boron , electrode , materials science , buffer solution , inorganic chemistry , metallurgy , chemistry , acceptor , layer (electronics) , composite material , telecommunications , physics , organic chemistry , computer science , condensed matter physics
The effect of passivated potential on corrosion resistance of the chromium in borate buffer solution was investigated. The electrochemical results showed that corrosion resistance of the passive film on the chromium electrode decreased with the increasing of passivated potential. The Mott–Schottky analysis showed that more acceptor concentrations in passive film due to higher passivated potential deteriorated corrosion resistance of the chromium electrode. The results from XPS showed that more chromium hydroxides were formed in higher passivated potential, while less chromium oxides were formed. More acceptor concentrations in passive films reduced corrosion resistance of the chromium electrode in borate buffer solution. Copyright © 2016 John Wiley & Sons, Ltd.