European Journal of Chemistry 2010, 1(4), 312-318 | doi: | Get rights and content


Thiazole derivatives as corrosion inhibitors for C-steel in sulphuric acid solution

Abd El-Aziz Fouda (1) , Ahmed Al-Sarawy (2) , Emad El-Katori (3,*)

(1) Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, EG-35516, Egypt
(2) Department of Mathematical and Physical Science, Faculty of Engineering, Mansoura University, Mansoura, EG-35516, Egypt
(3) Department of Chemistry, Faculty of Science, King Khalid University, Abha, SA-61413, Saudi Arabia
(*) Corresponding Author

Received: 10 May 2010 | Accepted: 30 Sep 2010 | Published: 22 Dec 2010 | Issue Date: December 2010


5-phenylazo-2-thioxo-thiazolidin-4-one and four of its derivatives have been investigated as corrosion inhibitors for C-steel in 1 M sulphuric acid solution using weight-loss and galvanostatic polarization techniques. The efficiency of the inhibitors increases with increase in inhibitor concentration but decreases with a rise in temperature. The conjoint effect of the thiazole derivatives and KBr, KSCN and KI has also been studied. The apparent activation energy (Ea*) and other thermodynamic parameters (ΔS*, ΔH* and ΔG*ads) for the corrosion process have also been calculated. The galvanostatic polarization data indicated that, the inhibitors were of mixed-type, but the cathode is more polarized than the anode. The slopes of the cathodic and anodic Tafel lines (ßc and ßa) are approximately constant and independent of the inhibitor concentration. The adsorption of these compounds on C-steel surface has been found to obey the Temkin's adsorption isotherm. The mechanism of inhibition was discussed in the light of the chemical structure of the undertaken inhibitors.



Corrosion inhibitors; C-steel; Weight loss; Synergistic effect; Polarization; Thiazole derivatives

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DOI: 10.5155/eurjchem.1.4.312-318.105

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How to cite

Fouda, A.; Al-Sarawy, A.; El-Katori, E. Eur. J. Chem. 2010, 1(4), 312-318. doi:10.5155/eurjchem.1.4.312-318.105
Fouda, A.; Al-Sarawy, A.; El-Katori, E. Thiazole derivatives as corrosion inhibitors for C-steel in sulphuric acid solution. Eur. J. Chem. 2010, 1(4), 312-318. doi:10.5155/eurjchem.1.4.312-318.105
Fouda, A., Al-Sarawy, A., & El-Katori, E. (2010). Thiazole derivatives as corrosion inhibitors for C-steel in sulphuric acid solution. European Journal of Chemistry, 1(4), 312-318. doi:10.5155/eurjchem.1.4.312-318.105
Fouda, Abd, Ahmed Al-Sarawy, & Emad El-Katori. "Thiazole derivatives as corrosion inhibitors for C-steel in sulphuric acid solution." European Journal of Chemistry [Online], 1.4 (2010): 312-318. Web. 29 Nov. 2020
Fouda, Abd, Al-Sarawy, Ahmed, AND El-Katori, Emad. "Thiazole derivatives as corrosion inhibitors for C-steel in sulphuric acid solution" European Journal of Chemistry [Online], Volume 1 Number 4 (22 December 2010)

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