EP 0516700 B1 19940727 - CONVERSION TREATMENT METHOD AND COMPOSITION FOR ALUMINUM AND ALUMINUM ALLOYS.
Title (en)
CONVERSION TREATMENT METHOD AND COMPOSITION FOR ALUMINUM AND ALUMINUM ALLOYS.
Title (de)
VERFAHREN UND ZUSAMMENSETZUNGEN ZUR KONVERSIONSBEHANDLUNG VON ALUMINIUM UND ALUMINIUMLEGIERUNGEN.
Title (fr)
PROCEDE ET COMPOSITION DE TRAITEMENT DE CONVERSION POUR ALUMINIUM ET ALLIAGES D'ALUMINIUM.
Publication
Application
Priority
- JP 4016890 A 19900221
- JP 4016990 A 19900221
- US 9100965 W 19910213
Abstract (en)
[origin: WO9113186A1] The paint adhesion and corrosion resistance of surfaces of aluminum and its alloys, particularly when using a paint based on poly(vinyl chloride), is improved by using a conversion coating solution having a pH in the range from 1.0 to 3.0 and containing: (A) an amount of phosphate ions that is stoichiometrically equivalent to at least 5.0 g/L of phosphoric acid; (B) at least 1.0 g/L of hexavalent chromium; (C) at least 0.1 g/L of fluoride ions; and (D) a complex fluoride ion component selected from the group consisting of: (i) at least 4.0 g/L of fluosilicate ions, (ii) at least 0.5 g/L of fluoborate ions, (iii) at least 2.0 g/L of fluozirconate ions, and (iv) at least 2.0 g/L of fluotitanate ions.
IPC 1-7
IPC 8 full level
C23C 22/38 (2006.01)
CPC (source: EP)
C23C 22/38 (2013.01)
Citation (examination)
Chemical Abstracts, volume 98, no. 16, 1983, see page 284, abstract 130913j
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9113186 A1 19910905; AU 642478 B2 19931021; AU 7337091 A 19910918; BR 9106049 A 19921117; CA 2072592 A1 19910822; DE 69103139 D1 19940901; DE 69103139 T2 19950202; EP 0516700 A1 19921209; EP 0516700 B1 19940727
DOCDB simple family (application)
US 9100965 W 19910213; AU 7337091 A 19910213; BR 9106049 A 19910213; CA 2072592 A 19910213; DE 69103139 T 19910213; EP 91904950 A 19910213