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Open AccessArticle

Mapping the Galvanic Corrosion of Three Metals Coupled with a Wire Beam Electrode: The Influence of Temperature and Relative Geometrical Position

1
College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao 266580, China
2
Corrosion and Protection Centre, The University of Manchester, Manchester M13 9PL, UK
*
Author to whom correspondence should be addressed.
Materials 2018, 11(3), 357; https://doi.org/10.3390/ma11030357
Received: 19 January 2018 / Revised: 22 February 2018 / Accepted: 26 February 2018 / Published: 28 February 2018
(This article belongs to the Section Structure Analysis and Characterization)
The local electrochemical properties of galvanic corrosion for three coupled metals in a desalination plant were investigated with three wire-beam electrodes as wire sensors: aluminum brass (HAl77-2), titanium (TA2), and 316L stainless steel (316L SS). These electrodes were used with artificial seawater at different temperatures. The potential and current–density distributions of the three-metal coupled system are inhomogeneous. The HAl77-2 wire anodes were corroded in the three-metal coupled system. The TA2 wires acted as cathodes and were protected; the 316L SS wires acted as secondary cathodes. The temperature and electrode arrangement have important effects on the galvanic corrosion of the three-metal coupled system. The corrosion current of the HAl77-2 increased with temperature indicating enhanced anode corrosion at higher temperature. In addition, the corrosion of HAl77-2 was more significant when the HAl77-2 wires were located in the middle of the coupled system than with the other two metal arrangement styles. View Full-Text
Keywords: desalination; galvanic corrosion; wire-beam electrode; heterogeneous electrochemistry; temperature; relative geometrical position desalination; galvanic corrosion; wire-beam electrode; heterogeneous electrochemistry; temperature; relative geometrical position
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MDPI and ACS Style

Ju, H.; Yang, Y.-F.; Liu, Y.-F.; Liu, S.-F.; Duan, J.-Z.; Li, Y. Mapping the Galvanic Corrosion of Three Metals Coupled with a Wire Beam Electrode: The Influence of Temperature and Relative Geometrical Position. Materials 2018, 11, 357.

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