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Portugaliae Electrochimica Acta
versão impressa ISSN 0872-1904
Resumo
SAYYAH, S. M. et al. Experimental and Theoretical Evaluation on the Effect of the Terminal Side Chain of a Polymeric Surfactant on the Inhibition Efficiency of Aluminum Corrosion in Acid Medium. Port. Electrochim. Acta [online]. 2014, vol.32, n.6, pp.417-429. ISSN 0872-1904. https://doi.org/10.4152/pea.201406417.
Inhibition effect of poly 3-dodecyloxy aniline polymeric surfactant (PC12H) on the corrosion of aluminum in 0.5 M HCl solution was investigated using potentiodynamic polarization technique under different experimental conditions. Inhibition efficiency and thermodynamic functions for dissolution and adsorption of PC12H are compared with Poly 3-(dodecyloxy sulfonic acid) aniline (PC12SO3H) to explain the effect of terminal side chain on the corrosion protection. Data show that the presence of -SO3H as a terminal group in PC12SO3H decreases the inhibition efficiency from 88.7%, in case of PC12H, to 55.1% in case of PC12SO3H. Quantum chemical calculations were performed on PC12H and PC12SO3H to investigate the relationship between the molecular structures and their inhibition efficiencies.
Palavras-chave : Corrosion; Polymers; Electrochemical Techniques; Adsorption; Thermodynamic Properties; Computational Techniques.