EFFECT OF SOME VARIABLES ON THE ELECTROPLATING OF ZINC FROM ACIDIC ACETATE BATHS

Electroplating of zinc onto steel substrates from baths containing zin c acetate and acetic acid has been investigated under different condit ions of bath composition, current density, temperature and super-impos ed sinusoidal a.c. on d.c. A detailed study has been made of the influ ence of these variables on the potentiodynamic cathodic polarization, cathodic current efficiency and the throwing power of these baths. The surface morphology of the deposits was examined by scanning electron microscopy and crystal structure by X-ray.