EP 1192296 A1 20020403 - CORROSION INHIBITING COMPOSITIONS FOR HEAT TRANSFER FLUIDS
Title (en)
CORROSION INHIBITING COMPOSITIONS FOR HEAT TRANSFER FLUIDS
Title (de)
KORROSIONSINHIBIERENDE ZUSAMMENSETZUNGEN FÜR WÄRMEÜBERTRAGUNGSFLÜSSIGKEITEN
Title (fr)
COMPOSITIONS INHIBITRICES DE LA CORROSION POUR FLUIDES DE TRANSFERT DE CHALEUR
Publication
Application
Priority
- FR 0001760 W 20000623
- FR 9908214 A 19990628
Abstract (en)
[origin: FR2795432A1] The composition comprises a four component mixture including an unsaturated monocarboxylic acid, a saturated mono- or dicarboxylic acid, a 1,3,5-triazine tricarboxylic acid and an azole compound. A process for the inhibition of multimetal corrosion by heat transfer fluids, whether or not they contain an organic freezing point depressant, comprises the addition to the fluid of 3 - 6 wt.% (preferably 3.8 - 5) of an organic inhibitor system consisting of (wt.%): (I) a monocarboxylic 10 - 18C unsaturated acid or an alkali metal salt, amine, or group of monoethylamine, diethylamine, triethylamine or alkanolamine of the group monoethanolamine, diethanolamine, triethanolamine or methyldiethanolamine (5 - 15); (II) a saturated carboxylic acid comprising a 5 - 16C monocarboxylic acid or a 4 - 12C dicarboxylic acid, or alkali, amine or alkanolamine derivatives (40 - 70); (III) a tricarboxylic derivative of 1,3,5-triazine (20 - 40) of formula (I); (IV) an azole derivative (1 - 5) selected from: (a) imidazoles of formula (II); (b) benzimidazoles of formula (III); (c) triazoles of formula (IV); (d) benzotriazoles of formula (V); (e) tetrahydrobenzotriazoles or thiazoles of formula (VI); (f) benzothiazoles of formula (VII); and (g) alkali metal salts of these azoles. R = 2 - 6C carboxyalkyl or an alkali metal salt, amine or alkanolamine of this derivative; R1 = H or Me; R2 = H or mercapto; R3 = H or a radical of formula -CH2-N(R4)R5; R4, R5 = 2-ethylhexyl or hydroxyalkyl, particularly an ethanol residue. An Independent claim is also included for the inhibitive composition and an inhibitive anti-freeze composition including the composition of the invention.
IPC 1-7
IPC 8 full level
C09K 5/20 (2006.01); C23F 11/10 (2006.01)
CPC (source: EP KR)
C09K 5/20 (2013.01 - EP); C23F 11/10 (2013.01 - EP KR)
Citation (search report)
See references of WO 0100902A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL
DOCDB simple family (publication)
FR 2795432 A1 20001229; FR 2795432 B1 20010824; AU 6287700 A 20010131; BR 0011906 A 20020319; CA 2377776 A1 20010104; CN 1371431 A 20020925; CZ 20014588 A3 20020515; EP 1192296 A1 20020403; KR 20020026889 A 20020412; MX PA01013315 A 20020730; PL 352778 A1 20030908; WO 0100902 A1 20010104
DOCDB simple family (application)
FR 9908214 A 19990628; AU 6287700 A 20000623; BR 0011906 A 20000623; CA 2377776 A 20000623; CN 00812217 A 20000623; CZ 20014588 A 20000623; EP 00949557 A 20000623; FR 0001760 W 20000623; KR 20017016814 A 20011228; MX PA01013315 A 20000623; PL 35277800 A 20000623