Corrosion protection mechanism of Ce3+/polyethylene glycol systems inhibitors for mild steel in sulfate solution

被引：0
|
作者：
Boudellioua, Hichem [1 ,2 ,5 ]
Hamlaoui, Youcef [2 ]
Tifouti, Lakhdar [3 ]
Pedraza, Fernando [4 ]
机构：
[1] Univ Amar Telidji, Lab Genie Proc, Laghouat, Algeria
[2] Univ Mohamed Cher Messaadia, Fac Sci & Technol, Lab Phys Matiere & Rayonnement LPMR, Souk Ahras, Algeria
[3] Univ Badji Mokhtar, Lab Genie Environm LGE, El Hadjar Annaba, Algeria
[4] Univ Rochelle, Lab Sci Ingn Environm LaSIE, UMR 7356, CNRS, Ave Michel Crepeau, La Rochelle, France
[5] Univ Amar Telidji, Lab Genie Proc, BP G37, Laghouat 03000, Algeria
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2023年 / 74卷 / 07期
关键词：
corrosion inhibition; electrochemical approach; mild steel; organic; inorganic complex; surface analysis; GREEN RUST ONE; RAMAN-SPECTROSCOPY; CARBON-STEEL; ZINC SURFACE; IRON; CHLORIDE; NITRATE; LAYERS; PEG; MACKINAWITE;
D O I：
10.1002/maco.202313727
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present paper, cerium nitrate salt was used as a green inhibitor to improve the corrosion resistance of mild steel in 0.1 M Na2SO4 solution. To increase the barrier effect and film stability of the protective layer, polyethylene glycol (PEG) was added. The corrosion tests were evaluated using d.c polarization techniques and electrochemical impedance spectroscopy. The composition and morphology of the sample surface were characterized using Raman spectroscopy and MEB/EDS analysis. The results show that the presence of PEG improved relatively the corrosion resistance of mild steel due to the removal of cracks, the pores blocking the formed film and the enhancement of adhesion and compactness of the cerium-based film. Consequently, the protective film became more coherent on the steel surface. Furthermore, the potentiodynamic polarization indicated that the Ce3+/PEG system behaved as a mixed-type inhibitor with the dominant effect of the cathodic part.
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页码：1086 / 1100
页数：15
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