EP 4123051 A1 20230125 - METHOD FOR PRODUCING RUST-PROOF MEMBER
Title (en)
METHOD FOR PRODUCING RUST-PROOF MEMBER
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES ROSTSICHEREN ELEMENTS
Title (fr)
PROCÉDÉ DE PRODUCTION D'UN ÉLÉMENT RÉSISTANT À LA ROUILLE
Publication
Application
Priority
- JP 2021030556 W 20210820
- JP 2020148790 A 20200904
Abstract (en)
A reactive chemical conversion treatment liquid capable of forming a Si-containing chemical conversion film is provided. The chemical conversion treatment liquid contains colloidal silica, a trivalent chromium-containing water-soluble substance, and a high pKa organic acid-containing water-soluble substance such as a hydroxymonocarboxylic acid and may further contain a film-formable metal-containing water-soluble substance in a preferred embodiment, and the pH of the chemical conversion treatment liquid is 3.0 or more.
IPC 8 full level
C23C 22/30 (2006.01)
CPC (source: EP US)
C23C 22/30 (2013.01 - US); C23C 22/53 (2013.01 - EP); C23C 22/50 (2013.01 - EP); C23C 2222/10 (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
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4123051 A1 20230125; EP 4123051 A4 20231025; CN 115362284 A 20221118; JP 2022043493 A 20220316; JP 6868313 B1 20210512; US 2023140575 A1 20230504; WO 2022050079 A1 20220310
DOCDB simple family (application)
EP 21864137 A 20210820; CN 202180026107 A 20210820; JP 2020148790 A 20200904; JP 2021030556 W 20210820; US 202117995177 A 20210820