ANTI-CORROSION COATING TO PROTECT INNER SURFACE OF PIPE, COMPOSITION FOR ITS PRODUCTION AND METHOD FOR ITS PRODUCTION Russian patent published in 2023 - IPC C09D5/08 C09D163/00 C09D7/00 

FIELD: oil and gas production.

SUBSTANCE: basis for a two-component mixture for obtaining an anti-corrosion coating is described, including components in the following ratio, wt.pts: bisphenol A/F-(epichlorohydrin) epoxy resin 5-25; xylene 10-13; isobutanol 1-5; ethylbenzene 1-3; a filler selected from the group including titanium dioxide, calcined kaolin, inert quartz filler and mixtures thereof 35-70; rheological additive 0.1-1.0; dispersant 0.1-1.5; deaerator 0.1-2.0; hardener for a two-component mixture to obtain an anti-corrosion coating, including components in the following ratio, wt.pts: xylene 20-25; N-1,1-diethyl-1,3-diaminopropane 10-20; benzyl alcohol 7-25; isobutanol 5-10; ethylbenzene 3-7; bis(aminomethyl)benzene 3-5; 3-(2-aminoethylamino)propyltrimethoxysilane 2-5; 2-hydroxybenzoic acid 1-3; and a kit for producing an anti-corrosion coating, including said base and hardener, the base and hardener being stored separately in sealed containers. A method for producing an anti-corrosion coating to protect the surface of a pipe using such a base and a hardener includes the following steps: (a) mixing the base and hardener in a mass ratio of 2:1 to 12:1 to obtain a two-component mixture; (b) preparing the pipe surface; (c) applying a two-component mixture to the surface of the pipe; (d) heat treatment of the pipe with the mixture applied to it to obtain an anti-corrosion coating. An anti-corrosion coating for protecting the pipe surface obtained by the specified method is also described.

EFFECT: increase in the corrosion resistance of the resulting coating.

25 cl, 4 tbl, 38 ex