X80 Steel Corrosion Induced by Alternating Current in Water-Saturated Acidic Soil

X80 steel corrosion induced by alternating current (AC) had been investigated by surface analyses and electrochemical measurements in water-saturated acidic soils. The AC sharply increased the corrosion rate of X80 steel. Moreover, the DC potential of X80 steel shifted toward the negative direction...

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Bibliographic Details
Published in:Corrosion (Houston, Tex.) Tex.), 2020-03, Vol.76 (3), p.248-267
Main Authors: Wei, Boxin, Qin, Qingyu, Fu, Qi, Bai, Yunlong, Xu, Jin, Yu, Changkun, Sun, Cheng, Ke, Wei
Format: Article
Language:English
Subjects:
Acidic soils
Alternating current
Cathodic protection
Corrosion
Corrosion products
Corrosion rate
Density
Electrochemistry
Electrodes
High strength low alloy steels
Oxidizing agents
Saturated soils
Scanning electron microscopy
Soil
Soil investigations
Soil water
Spectrum analysis
Steel
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Summary:X80 steel corrosion induced by alternating current (AC) had been investigated by surface analyses and electrochemical measurements in water-saturated acidic soils. The AC sharply increased the corrosion rate of X80 steel. Moreover, the DC potential of X80 steel shifted toward the negative direction after applying AC density, and decreased with the AC density ascending from 0 A/m2 to 200 A/m2. A power function model, CR = ain + b, was used to reflect the relation between AC density and corrosion rate. γ-FeOOH acting as an oxidizer weakened the protective ability of product film, and further accelerated the corrosion of steel.
ISSN:0010-9312
1938-159X
DOI:10.5006/3418