At a chemical processing plant, two areas of the concrete floor are deteriorating under the attack of chemical spills. One of the areas is exposed to an organic solvent; the other is exposed to an inorganic acid. What types of overlays can be applied to the floor to resist these chemicals?
Because of the widely varying formulations of many generic types of overlays, it's difficult to make generalizations about their chemical resistance. Typically, vinyl esters and furans are resistant to organic solvents, while epoxy novolacs and methyl methacrylates have moderate resistance. In addition, epoxies are resistant to some solvents. Epoxy novolacs, furans, vinyl esters, and carbon brick all are resistant to inorganic acids. Potassium silicates and acid brick also are resistant, but not to hydrofluoric acid. In addition, sulfur cement and urethanes have moderate resistance to inorganic acids. Reference Peter H. Emmons, Concrete Repair and Maintenance Illustrated, R.S. Means Co. Inc., 1993.