FIELD: applying of protective coatings. SUBSTANCE: method comprises steps of applying an additional layer on a surface of a protective coating, the above mentioned additional layer consists a composition with low wettability, being a metallic melt, providing a ratio of cohesion strength of the above mentioned layer with the protective coating and cohesion strength of the protective coating with the lining, equal to (0,05-0,2): 1. The protective coating includes (mass % ): kaoline 10-20; alumochromophosphate binder 25-35 and alumina 45-65. The additional layer has the composition, including (mass % ): kaoline 10-20; cryolite 10-20; phosphate binding 5-15 and alumina 45-75. EFFECT: enhanced protection degree of lining. 4 cl, 1 tbl
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