EP 3774672 A1 20210217 - METHOD FOR PREVENTING THE FORMATION OF WHITE RUST ON A ZINC-COATED STEEL SURFACE
Title (en)
METHOD FOR PREVENTING THE FORMATION OF WHITE RUST ON A ZINC-COATED STEEL SURFACE
Title (de)
VERFAHREN ZUR VERHINDERUNG DER BILDUNG VON WEISSROST AUF EINER VERZINKTEN STAHLOBERFLÄCHE
Title (fr)
PROCEDE DE PREVENTION DE LA FORMATION DE ROUILLE BLANCHE SUR UNE SURFACE EN ACIER RECOUVERTE DE ZINC
Publication
Application
Priority
- FR 1800261 A 20180329
- EP 2019058073 W 20190329
Abstract (en)
[origin: WO2019185906A1] The invention relates to a method for preventing the formation of white rust on a steel surface coated at least partially with zinc comprising a) bringing said surface, preferably under thermal load, into contact with an aqueous composition, the pH of which is between 6.5 and 8.5 comprising at least one organic acid of formula (I): R-X-OH wherein X represents C(O) or S(O)2, and R represents an organic chain. The invention also relates to a composition, and also to a cooling tower treated by the method according to the invention.
IPC 8 full level
C02F 5/10 (2006.01); C09K 8/528 (2006.01); C23C 22/68 (2006.01); C23F 11/10 (2006.01); C23F 11/12 (2006.01); C23F 11/16 (2006.01); C23F 14/02 (2006.01); F28F 19/00 (2006.01)
CPC (source: EP US)
C02F 5/10 (2013.01 - EP); C09K 8/528 (2013.01 - EP); C23C 22/68 (2013.01 - EP US); C23F 11/10 (2013.01 - US); C23F 11/163 (2013.01 - US); C23F 11/167 (2013.01 - US); C23F 11/184 (2013.01 - US); C23F 14/02 (2013.01 - EP US); F28F 19/00 (2013.01 - EP)
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2019185906 A1 20191003; CA 3095231 A1 20191003; EP 3774672 A1 20210217; FR 3079528 A1 20191004; US 2021017652 A1 20210121
DOCDB simple family (application)
EP 2019058073 W 20190329; CA 3095231 A 20190329; EP 19713071 A 20190329; FR 1800261 A 20180329; US 201917040032 A 20190329