Resumo

MIHIT, M. et al. Behaviour of Brasses Corrosion in Nitric Acid with and without PMT. Port. Electrochim. Acta [online]. 2007, vol.25, n.4, pp.471-480. ISSN 0872-1904.

The comparative study of corrosion behaviour of brasses 70Cu30Zn and 60Cu40Zn in HNO₃ solution in absence and in presence of 1-phenyl-5-mercapto-1,2,3,4-tetrazole (PMT) was studied by gravimetric and electrochemical methods. Results obtained are in good agreement and reveal that the corrosion rate depends on immersion time and zinc content in the alloy. Copper and zinc losses from each specimen studied, at various immersion times, were estimated by Atomic Adsorption Spectroscopic analysis. This shows that the inhibition efficiency of the inhibitor towards copper is more significant than zinc. PMT was adsorbed preferentially on the copper surface and inhibits the process of corrosion of brasses in the nitric acid medium.

Palavras-chave : brass; corrosion; inhibition; PM.

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