Inhibition of zinc corrosion under variable conditions

Abstract EN

A study of the zinc behavior under specified conditions of corrosion was done.

The conditions in which this study was held are 0.1N HCl solution for three values of temperature for each media viz 20, 40 and 60oC.

The inhibition of zinc corrosion in 0.1N HCl solution was performed using thiourea at the concentrations of (0, 300 and 600 ppm), while for 0.1N NaCl solution, it was NaNO3 for three values of concentration (0, 150 and 300ppm).

It was noticed that the thiourea inhibition in the acid media approaches up to 90%, while for 0.1N NaCl solution in the presence of NaNO3 was up to 78%.

All the experiments were carried out using the weight loss method as well as polarization technique.

It was seen that the corrosion rate increased and the corrosion potential becoming more negative with the increase in temperature.

Increasing inhibitor concentration tends to reduce corrosion current and corrosion potential goes to more positive values.