Читать книгу Henley's Formulas, Recipes and Processes (Applied Chemistry) - Various - Страница 8

—A paint to protect cement against acid is obtained by mixing pure asbestos, very finely powdered, with a thick solution of {10} sodium silicate. The sodium silicate must be as alkaline as possible. The asbestos is first rubbed with a small quantity of the silicate, until a cake is obtained and then kept in well-closed vessels. For use this cake is simply thinned with a solution of the silicate, which furnishes a paint two or three applications of which protect the walls of reservoirs, etc., against any acid solid or liquid. This mass may also be employed for making a coating of sandstone.