Acid, alkali and salt resistant enamel coating, preparation method thereof and application of acid, alkali and salt resistant enamel coating in cable bridge

The invention discloses an acid, alkali and salt resistant enamel coating as well as a preparation method and application thereof in a cable bridge, and belongs to the technical field of anticorrosive materials. The acid, alkali and salt resistant enamel coating is prepared from the following raw materials in parts by weight: 100 parts of silica ore, 20 to 35 parts of borax, 5 to 15 parts of magnesium carbonate, 8 to 20 parts of sodium aluminate, 10 to 15 parts of Al2O3, 3 to 8 parts of ZrO2, 1 to 4 parts of TiO2, 5 to 10 parts of Li2O, 4 to 8 parts of Na2O, 1 to 1.5 parts of CoO, 2 to 4 parts of NiO and 3 to 5 parts of MnO. The enamel composite cable bridge is obtained by electrostatically spraying the glaze on the steel framework and sintering, the outer enamel and the inner steel plate are good in adhesion and not prone to falling off, the enamel coating is thin and smooth in surface, the bridge has excellent acid, alkali and salt corrosion resistance on the premise that the bridge meets the large-span req