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Corrosion inhibition of carbon steel by acridine orange in HCl solution: Electrochemical and weight loss studies

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Title Corrosion inhibition of carbon steel by acridine orange in HCl solution: Electrochemical and weight loss studies
 
Creator Taheri, Aboozar
Ahmadi, Hossein
 
Subject Acridine orange
Carbon steel
Corrosion
Electrochemical tests
Inhibitor
Weight loss
 
Description 67-75
The inhibition effect of acridine orange (AO) on the corrosion of A105 carbon steel in 0.5 M hydrochloric acid has been
investigated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and weight loss tests. Using
polarization plots and corrosion rate calculations, it has been revealed that AO acts as an effective inhibitor. The results have
showed that the inhibition efficiency increases with increasing inhibitor concentration and A behaves as a mixed type
inhibitor in HCl solution. Based on the data obtained from the EIS tests, it has been determined that the charge transfer
resistance increased from 74.20 Ω.cm2 for blank solution to 250 Ω.cm2for 100 ppm of AO. Comparison of the results
obtained from the three methods, have shown that the methods are in acceptable agreement. Investigation the effect of
temperature in the range of 20-60 °C has indicated that the inhibition efficiency increased with temperature, so that at 40 and
60 °C, the inhibition efficiency would reach 90%. The thermodynamic parameters of steel dissolution including activation
energy, standard enthalpy and entropy of activation have been calculated and discussed. It was also found, that the
adsorption of AO on the steel surface has obeyed Langmuir isotherm and adsorption has been performed spontaneously.
 
Date 2023-01-27T06:56:19Z
2023-01-27T06:56:19Z
2023-01
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscpr.res.in/handle/123456789/61297
https://doi.org/10.56042/ijct.v30i1.62034
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJCT Vol.30(1) [January 2023]