EFFECT OF BENZOQUINOLINES AND ACRIDINE ON THE CORROSION OF ZINC IN HYDROHALIC ACIDS.

Abstract

The effect of benzo(f)quinoline, benzo(h)quinoline and acridine on the corrosion of zinc in hydrohalic acids has been studied. Halide ions accelerate the corrosion whereas quinolines and acridine act as corrosion inhibitors. Halide ions enhance the protection of zinc by each inhibitor. The polarization data reveal that these inhibitors act as ambiodic inhibitors. The mechanism of corrosion inhibition is discussed on the basis of coadsorption and synergistic effect of anions and inhibitor molecules