1. The mechanisms of corrosion inhibition of hot-dip galvanized steel by vanadyl oxalate: A galvanic corrosion investigation supported by XPS
- Author
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Xiaogang Li, Qifu Zhang, Qiu Xiaopan, Yucheng Wu, Sheming Jiang, Gao Zhiqiang, and Dawei Zhang
- Subjects
Materials science ,020209 energy ,General Chemical Engineering ,Inorganic chemistry ,02 engineering and technology ,General Chemistry ,021001 nanoscience & nanotechnology ,Cathode ,Oxalate ,Corrosion ,Cathodic protection ,law.invention ,Anode ,Galvanic corrosion ,chemistry.chemical_compound ,X-ray photoelectron spectroscopy ,chemistry ,law ,0202 electrical engineering, electronic engineering, information engineering ,Galvanic cell ,General Materials Science ,0210 nano-technology - Abstract
The mechanisms of corrosion inhibition of hot-dip galvanized steel by vanadyl oxalate were studied using galvanic corrosion approach and XPS. The partial separation of electrode reactions was achieved using a split cell design. Injection of vanadyl oxalate solution to the cathode side of split cells significantly reduced the galvanic current, whereas injection to the anode side had little effect on the galvanic current. V(IV) inhibits oxygen reduction by a mechanism involving V(IV) reduction to V(III) and formation of V(III) layers on the cathode. V(IV) acts as a cathodic inhibitor, due to V(III) layer occupation of active sites for oxygen reduction.
- Published
- 2018