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Electrochemical inhomogeneities of steel in steel/copper alloy couple during galvanic corrosion in static and flowing seawater
Author(s) -
Li Zhao,
Liu Jie,
Zhang Lunwu,
Hou Jian,
Lu Zhonghai,
He Jianxin,
Zhang Peiqing
Publication year - 2019
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201810487
Subject(s) - materials science , seawater , copper , anode , galvanic cell , electrochemistry , alloy , metallurgy , carbon steel , electrode , alloy steel , corrosion , galvanic corrosion , composite material , chemistry , geology , oceanography
The electrochemical inhomogeneities of steel wires within a steel/copper alloy couple immersed in static and flowing seawater were studied by the wire beam electrode (WBE) technique, and the variations of the main anodic area of steel wires were discussed. It showed that the potential and current density distributions of steel wires in both static and flowing seawater were inhomogeneous while the electrochemical inhomogeneities of steel wires immersed in flowing seawater were significantly reduced. The main anodic area of steel wires immersed in static seawater moved from the steel wires at the edge of the WBE to other steel wires, and the main anodic area of steel wires immersed in flowing seawater moved from the steel wires adjacent to the steel/copper alloy interface to the steel wires further away. Polarity reversals of the single steel electrode can be found, but the reasons for the phenomena were different from each other.