Global patent index - EP 1015663 A1

EP 1015663 A1 2000-07-05 - CORROSION INHIBITION THROUGH THE USE OF A QUATERNARY PYRIDINE SALT-HYDROCARBON COMBINATION

Title (en)

CORROSION INHIBITION THROUGH THE USE OF A QUATERNARY PYRIDINE SALT-HYDROCARBON COMBINATION

Title (de)

KORROSIONVERHINDERUNG DURCH DIE VERWENDUNG QUATERNÄRER PYRIDIN SALZ-KOHLENWASSERSTOFF KOMBINATION

Title (fr)

INHIBITION DE LA CORROSION PAR L'UTILISATION D'UNE COMBINAISON SEL DE PYRIDINE QUATERNAIRE-HYDROCARBURE

Publication

EP 1015663 A1 (EN)

Application

EP 98901913 A

Priority

  • CA 9800076 W
  • CA 2196650 A

Abstract (en)

[origin: WO9833953A1] A method for inhibiting corrosion of a surface of carbon steel exposed to an aqueous medium in which the method includes forming a layer having a corrosion-inhibiting amount of a quaternary pyridine salt and a water-immiscible organic component on the surface by incorporating into the medium a composition containing the salt, the organic component and a surfactant. The surfactant is present in the composition in an amount sufficient to solubilize a sufficient amount of the organic component in the aqueous medium so as to permit formation of the protective layer. The organic component is most often a hydrocarbon and can be a single hydrocarbon, but is more likely to be a mixture of hydrocarbons. The surfactant can be cationic, non-ionic, amphoteric or anionic.

IPC 1-7 (main, further and additional classification)

C23F 11/14; E21B 41/02

IPC 8 full level (invention and additional information)

C09K 8/54 (2006.01); C23F 11/14 (2006.01)

CPC (invention and additional information)

C23F 11/149 (2013.01); C09K 8/54 (2013.01)

Citation (search report)

See references of WO 9833953A1

Designated contracting state (EPC)

DE

EPO simple patent family

WO 9833953 A1 19980806; AU 5851298 A 19980825; CA 2196650 A1 19980803; EP 1015663 A1 20000705

INPADOC legal status

2003-03-05 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020902

2000-12-06 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20001019

2000-07-05 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19990902

2000-07-05 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE