FIELD: petroleum storage tanks. SUBSTANCE: inside surface of tank bottom is protected against local microbiological and hydrogen sulfide corrosion by applying thick-layer clay-based coating. Coating is composed of, wt %: bentonite clay 50.0-60.0, oil-well cement 8.0-11.0, corrosion inhibitor 2.0-5.0, water-soluble bactericide 0.005-0.1, and water -. the balance. EFFECT: simplified procedure. 2 tbl
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