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Materials 2017, 10(8), 956; doi:10.3390/ma10080956

Enhanced Corrosion Resistance of Carbon Steel in Hydrochloric Acid Solution by Eriobotrya Japonica Thunb. Leaf Extract: Electrochemical Study

1
College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
2
Chongqing Institute for food and Drug Control, Chongqing 401121, China
*
Authors to whom correspondence should be addressed.
Received: 19 July 2017 / Revised: 10 August 2017 / Accepted: 11 August 2017 / Published: 16 August 2017
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Abstract

The biodegradable inhibitors, which could effectively reduce the rate of corrosion of carbon steel, were investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The mixed-type inhibitors extracted from Eriobotrya japonica Thunb. leaf exhibited excellent inhibition performance, and the inhibition efficiency for carbon steel reached 90.0% at 298 K in hydrochloric acid. Moreover, the adsorption mechanism of the inhibitors on a carbon steel surface is described by the Langmuir adsorption isotherm. Simultaneously, the corrosion morphology of the carbon steel and the inhibitor structure were analyzed by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FT-IR), respectively. View Full-Text
Keywords: carbon steel; Eriobotrya japonica Thunb.; corrosion inhibitor carbon steel; Eriobotrya japonica Thunb.; corrosion inhibitor
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Yang, W.; Wang, Q.; Xu, K.; Yin, Y.; Bao, H.; Li, X.; Niu, L.; Chen, S. Enhanced Corrosion Resistance of Carbon Steel in Hydrochloric Acid Solution by Eriobotrya Japonica Thunb. Leaf Extract: Electrochemical Study. Materials 2017, 10, 956.

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