FIELD: strain-sensitive brittle coats for determination of strain and stresses in members of oil and gas chemical equipment and pipe lines.
SUBSTANCE: proposed coat contains resorcinal-formaldehyde resin CF-282 with addition of carbamide-formaldehyde concentrate CFC-85; used as hardening agent of liquid carbamide-formaldehyde concentrate is aqueous solution of formalin, ethylene glycol and carboxymethyl cellulllose and hexamethylene-tetramine; 100 parts by mass of resorcinal-formaldehyde resin contain the following components, %: carbamide-formaldehyde concentrate CFC-85, 35-50; hardening agent, 22-25; hexamethylene-tetramine, 3-6.
EFFECT: enhanced resistance of coat to aggressive media.
2 cl, 1 tbl, 4 ex
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