Poly-levodopa as an Eco-friendly Corrosion Inhibitor for Q235 Steel

The corrosion inhibition effect of polylevodopa (poly-(L-DOPA)) on Q235 carbon steel in 1 M HCl was studied owing to its low cytotoxicity and special structure. Electrochemical measurements show that the corrosion inhibition efficiency increases with the increase of poly-(L-DOPA) concentration and t...

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Bibliographic Details
Published in:International journal of electrochemical science 2020-12, Vol.15 (12), p.12302-12317
Main Authors: Yang, Feng, Wei, Jiayu, Qiu, Shihui, Liu, Chengbao, Cheng, Li, Zhao, Haichao
Format: Article
Language:English
Subjects:
Corrosion inhibition
Hydrochloric acid solution
Poly-(L-DOPA)
Q235 Steel
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Summary:The corrosion inhibition effect of polylevodopa (poly-(L-DOPA)) on Q235 carbon steel in 1 M HCl was studied owing to its low cytotoxicity and special structure. Electrochemical measurements show that the corrosion inhibition efficiency increases with the increase of poly-(L-DOPA) concentration and the immersion time. When the concentration of poly-(L-DOPA) is 300 mg/L, the corrosion inhibition efficiency can reach 97%. Confocal laser scanning microscopy (CLSM) and field emission scanning electron microscope (FESEM) proved that poly-(L-DOPA) has a good corrosion inhibition effect on Q235 carbon steel immersed in 1 M HCl. Poly-(L-DOPA) adsorbs on the surface of Q235 carbon steel to form a protective film, and followed the Langmuir adsorption isotherm.
ISSN:1452-3981
1452-3981
DOI:10.20964/2020.12.72