Global Patent Index - EP 0971049 A1

EP 0971049 A1 2000-01-12 - Methods of inhibiting corrosion using halo-benzotriazoles

Title (en)

Methods of inhibiting corrosion using halo-benzotriazoles

Title (de)

Verfahren zur Korrosionsinhibierung unter Verwendung von Halo-Benzotriazole

Title (fr)

Procédés d'inhibition de la corrosion utilisant des halo-benzotriazoles

Publication

EP 0971049 A1 (EN)

Application

EP 98304911 A

Priority

EP 98304911 A

Abstract (en)

The use of halo-benzotriazoles as corrosion inhibitors in aqueous systems is disclosed. Halo-benzotriazoles such as chloro-tolyltriazole and bromo-tolyltriazole were found to be more effective corrosion inhibitors than tolyltriazole in the presence of chlorine.

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

C23F 11/08; C23F 11/10

IPC 8 full level (invention and additional information)

C23F 11/08 (2006.01); C23F 11/10 (2006.01)

CPC (invention and additional information)

C23F 11/08 (2013.01); C23F 11/10 (2013.01)

Citation (search report)

  • [X] WO 9629449 A1 19960926 - BETZ LABORATORIES [US]
  • [X] US 4184991 A 19800122 - SCHEURMAN CLARENCE III [US]
  • [X] EP 0478247 A2 19920401 - CALGON CORP [US]
  • [X] EP 0481667 A2 19920422 - CALGON CORP [US]
  • [A] US 5503775 A 19960402 - RAO NARASIMHA M [US], et al
  • [A] DATABASE WPI Section Ch Week 7417, Derwent World Patents Index; Class E13, AN 74-31998V, XP002083198
  • [A] ZAK E.G.: "The Mechanism of the protective action of halogen derivatives of benzotriazole in preventing the corrosion of metals", WERKSTOFFE UND KORROSION., vol. 30, no. 10, WEINHEIM DE, pages 740 - 741, XP002083292
  • [AD] HOLLANDER O ET AL: "THE CHEMISTRY OF AZOLE COPPER CORROSION INHIBITORS IN COOLING WATER", CORROSION, vol. 41, no. 1, 1 January 1985 (1985-01-01), pages 39 - 45, XP002008378
  • [AD] LU F ET AL: "EFFECT OF HALOGENATION ON YELLOW METAL CORROSION: INHIBITION BY TRIAZOLES", CORROSION, vol. 50, no. 6, 1 June 1994 (1994-06-01), pages 422 - 431, XP000457454

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB IE IT LI NL PT SE

DOCDB simple family

EP 0971049 A1 20000112