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1. WO2000042237 - INORGANIC CONVERSION COATINGS FOR FERROUS SUBSTRATES

Publication Number WO/2000/042237
Publication Date 20.07.2000
International Application No. PCT/US2000/000929
International Filing Date 14.01.2000
Chapter 2 Demand Filed 23.06.2000
IPC
C23C 22/62 2006.01
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
22Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
05using aqueous solutions
60using alkaline aqueous solutions with pH > 8
62Treatment of iron or alloys based thereon
CPC
C23C 22/62
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
22Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
05using aqueous solutions
60using alkaline aqueous solutions with pH greater than 8
62Treatment of iron or alloys based thereon
Y10T 428/12694
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
428Stock material or miscellaneous articles
12All metal or with adjacent metals
12493Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
12687Pb- and Sn-base components: alternative to or next to each other
12694and next to Cu- or Fe-base component
Applicants
  • RUTGERS, THE STATE UNIVERSITY [US/US]; Old Queens Somerset Street New Brunswick, NJ 08903, US
Inventors
  • RIMAN, Richard, E.; US
  • CHO, Seung-Beom; US
Agents
  • BUTCH, Peter, J., III ; Synnestvedt & Lechner LLP 2600 Aramark Tower 1101 Market Street Philadelphia, PA 19107-2950, US
Priority Data
09/231,89114.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) INORGANIC CONVERSION COATINGS FOR FERROUS SUBSTRATES
(FR) REVETEMENTS DE CONVERSION INORGANIQUE POUR SUBSTRATS FERREUX
Abstract
(EN)
The formation of passivation coatings on ferrous substrates is disclosed in which a substrate is heated in an aqueous 1.0 to 6.0 M basic metal hydroxide treatment bath containing SiO2 and a water-soluble glycol, at a temperature that is effective to form a passivation coating on the substrate until the passivation coating is formed thereon, wherein the treatment bath contains between 0.25 and 1.0 moles of SiO2 per liter of glycol and water. Acmite passivation coatings formed by this method are also disclosed.
(FR)
L'invention concerne la formation de revêtements de passivation sur des substrats ferreux. Le procédé consiste à chauffer le substrat dans un bain de traitement constitué d'un hydroxyde métallique basique aqueux 1,0 à 6,0 M contenant du SiO2 et un glycol soluble dans l'eau, à une température efficace pour former un revêtement de passivation sur le substrat jusqu'à ce que ledit revêtement soit totalement formé. Le bain de traitement contient entre 0,25 et 1,0 moles de SiO2 par litre de glycol et de l'eau. L'invention concerne également les revêtements de passivation à base d'acmite formés selon ledit procédé.
Also published as
Latest bibliographic data on file with the International Bureau