WATER-SOLUBLE INHIBITOR OF METAL CORROSION Russian patent published in 2019 - IPC C23F11/167 

FIELD: metallurgy.

SUBSTANCE: invention relates to protection of metals from corrosion in neutral aqueous media and can be used for protection against corrosion destruction of car body and its bottom. Water-soluble inhibitor of metal corrosion includes sodium tripolyphosphate and a borate-containing compound, wherein as a borate-containing compound it contains diethylene tetraborate ammonium compound of composition (NH₄)₂B₄O₇⋅2C₂H₈N⋅2H₂O, in terms of anhydrous salt, with the following ratio of initial components, wt%: sodium tripolyphosphate 10.0–20.0, diethylene tetraborate ammonium 80.0–90.0.

EFFECT: improved anticorrosion properties, longer service life of black metal equipment.

1 cl, 4 tbl, 1 dwg