EP 0658636 A1 19950621 - Corrosion inhibitor for metallic material, such as steel.
Title (en)
Corrosion inhibitor for metallic material, such as steel.
Title (de)
Korrosionsinhibitor für metallisches Material, wie Stahl.
Title (fr)
Inhibiteur de la corrosion d'un matériau métallique, tel que l'acier.
Publication
Application
Priority
FR 9315196 A 19931214
Abstract (en)
Corrosion inhibitor for a metallic material such as steel, of the type consisting of an aqueous solution containing an alkali metal nitrite, characterised in that the said solution contains 0.01 to 0.3 mol/l of an alkali metal nitrite, 0.01 to 0.3 mol/l of an alkali metal phosphate and phosphoric acid in the proportion of a quantity sufficient to maintain the pH of the said solution, measured at ambient temperature, between 6.9 and 7.2.
Abstract (fr)
L'invention a pour objet un inhibiteur de la corrosion d'un matériau métallique, tel que l'acier, du type constitué par une solution aqueuse renfermant un nitrite de métal alcalin, caractérisé en ce que ladite solution renferme 0,01 à 0,3 mol/l d'un nitrite de métal alcalin, 0,01 à 0,3 mol/l d'un phosphate d'un métal alcalin, et de l'acide phosphorique à raison d'une quantité suffisante pour maintenir le pH de ladite solution, mesuré à température ambiante, entre 6,9 et 7,2.
IPC 1-7
IPC 8 full level
C23F 11/00 (2006.01); C23C 22/68 (2006.01); C23F 11/18 (2006.01); C23G 1/00 (2006.01)
CPC (source: EP KR US)
C23C 22/68 (2013.01 - EP US); C23F 11/00 (2013.01 - KR); C23F 11/188 (2013.01 - EP US); C23G 1/00 (2013.01 - EP US)
Citation (search report)
- [XY] FR 2098832 A5 19720310 - GALLAY FUTS METALLIQUES
- [X] US 3522093 A 19700728 - WOOLMAN WILFRID A
- [Y] FR 1080119 A 19541207 - STANDARD OIL DEV CO
- [X] GB 1182247 A 19700225 - LORANT JOSEPH JOHN
- [X] DATABASE WPI Week 7743, Derwent World Patents Index; AN 77-76772Y
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
EP 0658636 A1 19950621; EP 0658636 B1 19991229; AT E188264 T1 20000115; CA 2137837 A1 19950615; DE 69422377 D1 20000203; DE 69422377 T2 20000824; ES 2141813 T3 20000401; FR 2713669 A1 19950616; FR 2713669 B1 19960105; JP 3398724 B2 20030421; JP H0835083 A 19960206; KR 100358219 B1 20030124; KR 950018670 A 19950722; US 5567354 A 19961022
DOCDB simple family (application)
EP 94470040 A 19941121; AT 94470040 T 19941121; CA 2137837 A 19941212; DE 69422377 T 19941121; ES 94470040 T 19941121; FR 9315196 A 19931214; JP 33308594 A 19941214; KR 19940034009 A 19941213; US 34618894 A 19941122