POLLIA JAPONICA LEAVES EXTRACT AS A GREEN CORROSION INHIBITOR FOR THE CORROSION OF MILD STEEL IN 1 M H2SO4 SOLUTION

Corrosion have been a thing of major concern in the past, especially in the steel and construction industries. Corrosion is the deterioration or destruction of metals and alloys in the presence of an environment by chemical or electrochemical means. Corrosion have led to the loss of bridges, oil pipes and other construction tools. A lot of corrosion inhibitors have been utilized in the combating of corrosion, but many of these inhibitors especially the synthetic corrosion inhibitors are toxic and harmful to man and its environment, this was what led to the current study. In the corrosion study leaf extract of pollia japonica was used to inhibit the corrosion of mild steel in H2SO4 acidic media using weight loss technique. From the result of the analysis it was discovered that the corrosion inhibition increased as the concentration of the plant extracts increased and they also decreased with increase in time of immersion at ambient temperature. The leaves extract of pollia japonica had a maximum inhibition efficiency of 78.57% in 1.0 M H2SO4 acidic medium. From the current analysis the rate of corrosion was found to decrease as the concentration of the plant extract was increased from 1 g/L to 5g/L. The results gotten was used to plot graphs of (Wo/Wf) against time, this plot proved the kinetics to be first order reaction. This is evident that extracts of PJ (pollia japonica) functioned as a good and suitable corrosion inhibitor, this green inhibitor is an environmentally friendly inhibitor and should be utilized for corrosion study