EP 0482614 B1 19951227 - Method of controlled passivation of the inside walls of a carbon steel cooling system and use of the process to check both the passivation of the metal and the cooling water quality
Title (en)
Method of controlled passivation of the inside walls of a carbon steel cooling system and use of the process to check both the passivation of the metal and the cooling water quality
Title (de)
Verfahren zur kontrollierten Passivierung der Innenwände eines Kühlkreislaufsystems aus Kohlenstoffstahl und Anwendung des Verfahrens zur Bestimmung des Passivierungszustandes und zur Prüfung der Qualität der Kühlflüssigkeit
Title (fr)
Procédé de passivation contrÔlée des parois intérieures d'un système de refroidissement en acier au carbone et utilisation du procédé pour le control de la passivation et du qualité de l'eau de refroidissement
Publication
Application
Priority
DE 4033686 A 19901023
Abstract (en)
[origin: EP0482614A1] The invention relates to a method of controlled passivation of the inside walls of a carbon-steel cooling circulation system which is open to the air and/or closed, with an aqueous coolant circulating therein and containing alkali metal bicarbonate and alkaline earth metal bicarbonate, and to the use of this method for determining the passivation state of the metallic contact surfaces, for controlling the corrosion inhibition and for checking the quality of the coolant, especially water. <IMAGE>
IPC 1-7
IPC 8 full level
C23C 22/62 (2006.01); C23C 22/68 (2006.01); C23F 15/00 (2006.01)
CPC (source: EP)
C23C 22/62 (2013.01); C23C 22/68 (2013.01); C23F 15/00 (2013.01)
Designated contracting state (EPC)
AT BE DE ES FR GB IT NL
DOCDB simple family (publication)
EP 0482614 A1 19920429; EP 0482614 B1 19951227; EP 0482614 B2 19990331; AT E132205 T1 19960115; DE 4135029 A1 19920430; DE 4135029 C2 19930513; DE 59107150 D1 19960208; ES 2082092 T3 19960316; ES 2082092 T5 19990816
DOCDB simple family (application)
EP 91118080 A 19911023; AT 91118080 T 19911023; DE 4135029 A 19911023; DE 59107150 T 19911023; ES 91118080 T 19911023