CONCENRATE OF CORROSION INHIBITORS Russian patent published in 2009 - IPC C09K5/00 C23F11/12 

FIELD: chemistry.

SUBSTANCE: invention relates to concentrate of corrosion inhibitors, containing in wt %: 0.02-70.0 mixture of, at least, one monocarboxylic acid, such as undecanic, dodecanic, 2-ethylhexanic, octanic, and at least one dicarboxylic acid, such as 1,6-hexadicarboxylic, sebacinic, 1,4-butanedicarboxylic or their alkali metal salts in any combination and in any ratio; 0.001-5.0 tolyltriazole or benzotriazole or their mixture in equal ratio; 0.01-3.0 salt of alkali metal or triethanolamine 2,2'-[[(methyl-1n-benzotriazole-1-yl)methyl]imino]bisethanole; 0.01-5.0 6,6', 6"-(1,3,5-triazin-2,4,6-tryltriimino)trihexanic acid; 0.01-1.5 foam suppressor; 10.0-15.0 water; the remaining part - glycols, such as ethylene glycol, propylene glycol.

EFFECT: improvement of exploitation properties of cooling liquids, ensuring long anti-corrosion protection of metal surfaces in cooling systems.

2 cl, 6 tbl