Journal
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume 26, Issue 4, Pages 1751-1757Publisher
SPRINGER
DOI: 10.1007/s11665-017-2581-2
Keywords
EIS; grounding grids; iron-aluminum oxides; soil corrosion
Categories
Funding
- Innovation Program of Shanghai Municipal Science and Technology Commission, China [14DZ2261000]
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Iron-aluminum oxides in the red soil have a significant impact on the corrosion behavior of the metal for grounding grids. Effects of iron-aluminum oxides on the corrosion behavior of the cross section of copper-clad steel in the red soil have been investigated using electrochemical impedance spectroscopy and Tafel polarization. All the data indicate that the iron-aluminum oxides can promote the corrosion of copper-clad steel in the red soil. The corrosivity of the red soil greatly increases after iron-aluminum oxides are added into the soil. Iron-aluminum oxides promote galvanic corrosion of copper-clad steel and increase the corrosion degree of the center steel layer. The iron-aluminum oxides stimulate corrosion process of copper-clad steel acting as a cathodic depolarizing agent. XRD results further validate that the corrosion products of the copper-clad steel bar mainly consist of Fe3O4 and Cu2O.
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