Collect. Czech. Chem. Commun. 1991, 56, 2800-2806

Retarding effect of some benzaldehyde derivatives on the dissolution of brass alloy in nitric acid solution

Fawzi Hassan Assaf and Moustafa Hassan M. Abou-El-Wafa

Chemistry Department, Faculty of Science at Qena, Egypt


The effect of benzaldehyde and its ortho and para -OH and -OCH3 derivatives on the rate of dissolution of Brass alloy in nitric acid was investigated using thermometric technique. The results were treated by two different methods. It has been found that all compounds act as inhibitors and their effect increases with increasing concentration. The o-OH and o-OCH3 derivatives have the highest inhibition effect.