Electrochemical Response of A Single Wire-Electrode AC Probe in 3.5wt.% NaCl

Authors

Zhen-wen ZOU, 1. Center for Marine Materials Corrosion and Protection, College of Materials, Xiamen University,Xiamen 361005, Fujian, China;
Da-jiang ZHENG, 1. Center for Marine Materials Corrosion and Protection, College of Materials, Xiamen University,Xiamen 361005, Fujian, China;
Zi-ming WANG, 1. Center for Marine Materials Corrosion and Protection, College of Materials, Xiamen University,Xiamen 361005, Fujian, China;
Guang-ling SONG, 1. Center for Marine Materials Corrosion and Protection, College of Materials, Xiamen University,Xiamen 361005, Fujian, China;2. State Key Laboratory of Physical Chemistry of Solid Surfaces, XiamenUniversity, Xiamen 361005, Fujian, China;Follow
, 1. College of Physical Science and Technology, Xiamen University, Xiamen 361005, Fujian, China;2. State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;

Corresponding Author

Guang-ling SONG(guangling.song@hotmail.com)

Abstract

In this paper, a recently developed single wire-electrode AC probe technology which does not need a reference or counter electrode was employed to investigate the electrochemical corrosion and sacrificial anode protection behaviors of steel and zinc in 3.5wt.% NaCl. With this simple, fast, reliable and stable probe, the instantaneous corrosion rate and accumulated corrosion loss of carbon steel in 3.5wt.% NaCl were measured, and the results revealed that both were greater than those of zinc. Furthermore, the observed different corrosion behaviors between carbon steel and zinc during the immersion could be caused by their different surface films. With the galvanic couple of carbon steel-zinc, the protection efficiency offered by the anode zinc was found to be above 95%, and it increased initially and then decreased with immersion time.

Graphical Abstract

Keywords

single-wire electrode, AC probe technology, impedance spectrum, galvanic couple, corrosion

DOI Link

https://doi.org/10.13208/j.electrochem.190321

Publication Date

2020-06-28

Online Available Date

2019-04-18

Revised Date

2019-04-17

Received Date

2019-03-11

Recommended Citation

Zhen-wen ZOU, Da-jiang ZHENG, Zi-ming WANG, Guang-ling SONG, . Electrochemical Response of A Single Wire-Electrode AC Probe in 3.5wt.% NaCl[J]. Journal of Electrochemistry, 2020 , 26(3): 317-327.
DOI: 10.13208/j.electrochem.190321
Available at: https://jelectrochem.xmu.edu.cn/journal/vol26/iss3/7