Galvanic corrosion behavior of copper/titanium galvanic couple in artificial seawater super()

The corrosion behaviors of copper and copper/titanium galvanic couple (GC) in seawater were studied by electrochemical impedance spectroscopy (EIS) and electrochemical noise (EN) techniques in conjunction with scanning electron microscopy (SEM) method. The results show that the corrosion process of...

Full description

Saved in:
Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2014-02, Vol.24 (2), p.570-581
Main Authors: DU, Xiao-qing, YANG, Qing-song, CHEN, Yu, YANG, Yang, ZHANG, Zhao
Format: Article
Language:English
Subjects:
Copper
COPPER (PURE)
CORROSION
CORROSION PROTECTION
Electrochemical impedance spectroscopy
Evolution
GALVANIC CORROSION
JOINING
PITTING CORROSION
Sea water
SEAWATER
Titanium
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The corrosion behaviors of copper and copper/titanium galvanic couple (GC) in seawater were studied by electrochemical impedance spectroscopy (EIS) and electrochemical noise (EN) techniques in conjunction with scanning electron microscopy (SEM) method. The results show that the corrosion process of copper in seawater can be divided into two stages, in which corrosion resistance and S sub(E) show the same evolution trend of initial increase and subsequent decrease, while S sub(G) changes oppositely. However, the ensemble corrosion process of copper/ titanium GC in seawater includes three stages, in which corrosion resistance and S sub(E) show the evolution features of initial decrease with a subsequently increase, and the final decrease again; while S sub(G) changes oppositely. The potential difference between copper and titanium in their galvanic couple can accelerate the initiation of pitting corrosion of copper, and both the minimum and maximum corrosion potentials of copper/ titanium GC are much more positive than those of pure copper.
ISSN:1003-6326
DOI:10.1016/S1003-6326(14)63097-1