FIELD: metallurgy.
SUBSTANCE: invention relates to the field of protection of metals from underground corrosion and can be used to protect pipelines from corrosion in the conditions of soils of the Central Federal District of the Russian Federation. Inhibitor of anodic action of underground steel corrosion contains clarified spent MMOO engine oil produced by the non-reactive method of centrifugal purification.
EFFECT: protective effectiveness of the underground corrosion inhibitor is 70 to 99%, produced by a simple reagent-free technology, affordable due to the absence of restrictions in the raw material base, and solves the problem of disposal of spent engine oil.
1 cl, 5 tbl
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