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Co Complexes as a Corrosion Inhibitor for 316 L Stainless Steel in H<sub>2</sub>SO<sub>4</sub> Solution
Department of Materials Science and Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
Department of Materials Engineering, Daneshpajoohan Institute of Higher Education, Isfahan, Iran
Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran
Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, USA
- 1 Department of Materials Science and Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
- 2 Department of Materials Engineering, Daneshpajoohan Institute of Higher Education, Isfahan, Iran
- 3 Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran
- 4 Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, USA
Journal of Materials Science and Chemical Engineering·Volume 04 (2016)·Pages 28–35·Published 7 September 2016·DOI10.4236/msce.2016.49003
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Abstract
The effect of Co complexes with a Schiff base ligand on the electrochemical corrosion behavior of 316 L SS in 0.1 M H 2 SO 4 at 25 ℃ has been investigated at various inhibitor concentration using electrochemical techniques (impedance spectroscopy (EIS), polarization curves). Corrosion measurements indicate that Co complex act as moderately inhibitors. Results revealed that increasing the concentration of Co complex increases the corresponding IE% values till 100 ppm. Co complex acts as mixed type inhibitors with predominant effect on the anodic dissolution of iron. Adsorption studies showed that the process follows Langmuir adsorption isotherm.
KeywordsCorrosion InhibitorsCo Complex316 L Stainless SteelPolarizationEIS
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