Galvanic Effect and Alternating Current Corrosion of Steel in Acidic Red Soil

Alternating current (AC) corrosion behavior of carbon steel–copper couple in acidic red soil was studied by means of the electrochemical test, mass loss, X-ray diffraction (XRD) and scanning electron microscope (SEM) characterization. Mathematical models were established to expound the impacts of AC...

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Bibliographic Details
Published in:Metals (Basel ) 2022-02, Vol.12 (2), p.296
Main Authors: Wang, Qi-Wei, Zhang, Jun-Xi, Gao, Yan, Dai, Nian-Wei, Chen, Yun-Xiang, Lin, De-Yuan, Xia, Xiao-Jian
Format: Article
Language:English
Subjects:
Alternating current
Carbon steel
Carbon steels
Corrosion effects
Corrosion mechanisms
Corrosion potential
corrosion products
Corrosion rate
Couples
electrochemical test
Electrodes
Experiments
galvanic corrosion
Galvanized steel
mathematical model
Research methodology
Soils
Statistical analysis
Statistical models
Work stations
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Summary:Alternating current (AC) corrosion behavior of carbon steel–copper couple in acidic red soil was studied by means of the electrochemical test, mass loss, X-ray diffraction (XRD) and scanning electron microscope (SEM) characterization. Mathematical models were established to expound the impacts of AC and galvanic effect on the corrosion mechanism. The results demonstrate that the corrosion rate of the galvanic couple is positively related to AC intensity. Galvanic effect and AC synergistically aggravate the corrosion of steel. The composition of α-FeOOH declines while γ-FeOOH is increased with AC interference. Based on the statistical model, the galvanic effect has a more significant influence on steel corrosion compared with AC.
ISSN:2075-4701
2075-4701
DOI:10.3390/met12020296