ABSTRACT
Cementitious coatings provide corrosion resistance to substrates such as steel by maintaining the pH at the metal/coating interface above 4, a pH range where steel corrodes at a low rate. The proper selection of materials and their application is necessary if the coating is to be effective. To select the proper material, it is necessary to define the problem:
1. Identify all chemicals that will be present and their concentrations. Knowing pH alone is not sufficient. All pH tells you is whether the environment is acid, neutral, or alkaline. It does not identify whether the environment is oxidizing, organic or inorganic, alternately acid or alkaline.
