Inhibition of Mild Steel Corrosion in Hydrochloric Acid Solution by Salicylaldehyde Thiosemicarbazone

doi:10.11944/j.issn.1000-0518.2015.06.140317

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (6): 720-725.DOI: 10.11944/j.issn.1000-0518.2015.06.140317

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Inhibition of Mild Steel Corrosion in Hydrochloric Acid Solution by Salicylaldehyde Thiosemicarbazone

ZHANG Honghong^*, XIE Yan, LIU Yuanwei, YANG Zhongnian^*

Department of Chemical Engineering,Binzhou University,Binzhou,Shandong 256600,China

Received:2014-09-15 Accepted:2014-12-23 Published:2015-06-10 Online:2015-06-10
Contact: Honghong ZHANG,Zhongnian YANG
Supported by:
Supported by Supported by the Natural Science Foundation of Shandong Province (No.ZR2014BQ027, No.ZR2014EFQ007), the Science and Technology Development Plan of Binzhou (No.2013ZC0703), Scientific Research Fund of Binzhou University (No.2010Y04)

Abstract

Abstract:

A Schiff base corrosion inhibitor named salicylaldehyde thiosemicarbazone (ST) was synthesized. The inhibition effect of ST on the mild steel (MS) in 1 mol/L HCl solution was investigated by mass loss measurements, potentiodynamic polarization and electrochemical impedance spectroscopy. Meanwhile, the surface morphology was observed by scanning electron microscopy. The results show that ST has an excellent inhibiting effect for Q235 steel in the HCl solution. ST acts as a good inhibitor,predominantly retarding with cathodic reaction through adsorption on a MS surface. The adsorption of ST on Q235 steel surface obeys the Langmuir adsorption isotherm.

Key words: corrosion inhibitor, Schiff base, mild steel, electrochemical impedance spectroscopy, acid corrosion

CLC Number:

ZHANG Honghong, XIE Yan, LIU Yuanwei, YANG Zhongnian. Inhibition of Mild Steel Corrosion in Hydrochloric Acid Solution by Salicylaldehyde Thiosemicarbazone[J]. Chinese Journal of Applied Chemistry, 2015, 32(6): 720-725.

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Inhibition of Mild Steel Corrosion in Hydrochloric Acid Solution by Salicylaldehyde Thiosemicarbazone

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