EXPERIMENTAL INVESTIGATION OF ANTICORROSIVE REBAR COATING OVER MILDSTEEL ROD USING PLASTIC WASTES

The objective of this project is to discover a solution for controlling the corrosion in steel bars. Among all waste plastics PET bottles, poly-ethene bags are playing the major role in pollution. Thus an attempt has been made to reduce corrosion in rebar by using waste plastics. In this project used Polyethylene terephthalate [PET] bottles have been chosen among all plastics, experimental investigation was carried out with mild steel rods of 6 mm diameter and average length of 50mm coated with PET. Corrosion tests were conducted on the treated specimens at 700 ºC. Pore resistance (R p ), Resistance of the MS sample(Rct), corrosion current (Icorr ) were found to find the corrosion rate. From weight loss method, it was concluded that the treated samples can be effectively used against corrosion in concrete which is basic in nature (pH: 11- 12.5) and also for off shore works. The SEM image of treated MS sample shows the coating thickness varies from 1.19 micron – 3.37 micron.From EIS experiment, it was found that optimum temperature to induce a corrosion resistant property to the rebar is 700 ºC and optimum weight ratio of rebar and PET is 1:1.