The Effect of Adding Prim ary Epoxy on the Corrosion Rate of Low Carbon Steel in 5.25% Calcium Hypochlorite Solution

The  corrosion  process  occurs  in  almost  all  materials,  especially  metals, slowly but surely, which can cause a material to have a limited service life. Corrosion  cannot  be  prevented  but  the  rate  can  be  reduced.  One  of  t he methods  to  inhibit  the  effective  corrosion  rate  is by  giving  epoxy  primer treatment. This study aims to examine the effect of adding epoxy primer on the corrosion rate of low carbon steel immersed in a 5.25% Calcium hypochlorite solution. This research was conducted using 27 specimens in 9 vessels, each vessel contained 3 specimens immersed in low carbon steel without treatment, oil paint and epoxy primer. Volume of 1 liter of solution for 1 vessel. The results of this study indicate that the epoxy primer is able to inhibit the corrosion rate well. The reduction in weight of low carbon steel treated with oil paint is much greater than that of untreated low carbon steel using epoxy primer. The lowest corrosion rate was given by applying epoxy primer in 30 days of immersion with an average value of 0.001001695 mpy and the highest corrosion rate without treatment in 15 days of immersion with an average value of 0.005008473 mpy.