EP 2718390 A1 20140416 - IMPROVED CORROSION RESISTANCE WHEN USING CHELATING AGENTS IN CHROMIUM-CONTAINING EQUIPMENT
Title (en)
IMPROVED CORROSION RESISTANCE WHEN USING CHELATING AGENTS IN CHROMIUM-CONTAINING EQUIPMENT
Title (de)
VERBESSERTE KORROSIONSBESTÄNDIGKEIT DURCH VERWENDUNG VON CHELATBILDNERN BEI EINER CHROMHALTIGEN AUSRÜSTUNG
Title (fr)
RÉSISTANCE AMÉLIORÉE À LA CORROSION PAR UTILISATION D'AGENTS DE CHÉLATION DANS UN ÉQUIPEMENT CONTENANT DU CHROME
Publication
Application
Priority
- US 201161496236 P 20110613
- EP 11172815 A 20110706
- EP 2011072693 W 20111214
- EP 2011072696 W 20111214
- EP 2011073042 W 20111216
- EP 2012060952 W 20120611
- EP 12729436 A 20120611
Abstract (en)
[origin: WO2012171859A1] The present invention relates to process to reduce the corrosion of equipment containing a chromium-containing alloy in the oil and/or gas industry, comprising a step of contacting the equipment based on a chromium-containing alloy with a solution containing at least 1 wt% on total weight of the solution of glutamic acid ?,?-diacetic acid or a salt thereof (GLDA) and/or methylglycine ?,?-diacetic acid or a salt thereof (MGDA) having an acidic pH, the use of the above solutions in equipment containing a chromium-containing alloy to reduce corrosion, and to a system containing a piece of equipment used in the oil and/or gas industry made at least partly from chromium-containing alloy in contact with an acidic solution containing at least 1 wt% of glutamic acid N,N-di acetic acid or a salt thereof (GLDA) and/or methylglycine N,N-di acetic acid or a salt thereof (MGDA).
IPC 8 full level
C09K 8/60 (2006.01); C09K 8/528 (2006.01); C09K 8/54 (2006.01); C09K 8/72 (2006.01); C09K 8/74 (2006.01); C09K 8/86 (2006.01); C11D 3/33 (2006.01); C23F 11/04 (2006.01); C23F 11/14 (2006.01); C23G 1/08 (2006.01)
CPC (source: CN EP)
C09K 8/528 (2013.01 - CN EP); C09K 8/54 (2013.01 - CN EP); C09K 8/74 (2013.01 - CN EP); C11D 3/0073 (2013.01 - CN EP); C11D 3/33 (2013.01 - CN EP); C11D 7/3245 (2013.01 - CN EP); C23F 11/04 (2013.01 - CN EP); C23F 11/144 (2013.01 - CN EP); C23G 1/088 (2013.01 - CN EP); C09K 2208/32 (2013.01 - CN)
Citation (search report)
See references of WO 2012171859A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2012171859 A1 20121220; AU 2012269162 B2 20151029; BR 112013031323 A2 20161129; CA 2838299 A1 20121220; CN 103597051 A 20140219; CN 103597051 B 20161012; CO 6842015 A2 20140120; EA 028255 B1 20171031; EA 201391796 A1 20140730; EP 2718390 A1 20140416; JP 2014522451 A 20140904; MX 2013014400 A 20140925
DOCDB simple family (application)
EP 2012060952 W 20120611; AU 2012269162 A 20120611; BR 112013031323 A 20120611; CA 2838299 A 20120611; CN 201280028926 A 20120611; CO 14000884 A 20140103; EA 201391796 A 20120611; EP 12729436 A 20120611; JP 2014515144 A 20120611; MX 2013014400 A 20120611