COMPOSITION FOR PRESERVATION OF METALLIC OBJECTS, ESPECIALLY OIL- FIELD EQUIPMENT, DURING IN-PROCESS STORAGE AND TRANSPORTATION Russian patent published in 2005 - IPC

FIELD: corrosion protection.

SUBSTANCE: invention is designed for oil production and can also be used in mechanical engineering, instrumentation engineering, and other branches. Composition contains 6-10% low-grade lignosulfonates, 2-5% industrial oil (spindle oil, tall oil, or MS-20 oil), 60-65% production waste, and 24-28% additive, namely primary C₈-C₁₁-amines. Production waste is, in particular, vat residues from production of synthetic fatty C₁₀-C-acids or solid petroleum hydrocarbons: asphaltene-tar-paraffin deposits formed during production and transportation of petroleum. Use of composition increases degree of protection of metallic objects against corrosion under atmospheric precipitate conditions owing to retained high adhesion of coating formed from composition to metal, reduced porosity of coating, and prolonged period of time before appearance of the first center of corrosion attack at lower thickness of coating.

EFFECT: improved anticorrosion characteristics, simplified composition preparation technology, reduced coating formation time, and reduced expenses due to utilized waste.

2 cl, 2 tbl