EP 1246952 A4 20041208 - COMPOSITION AND PROCESS FOR TREATING METALS
Title (en)
COMPOSITION AND PROCESS FOR TREATING METALS
Title (de)
ZUSAMMENSETZUNG UND VERFAHREN ZUR BEHANDLUNG VON METALLEN
Title (fr)
COMPOSITION ET PROCEDE POUR LE TRAITEMENT DES METAUX
Publication
Application
Priority
- US 0029266 W 20001024
- US 16245599 P 19991029
Abstract (en)
[origin: WO0132952A1] A chromium free conversion coating at least equivalent in corrosion protective quality to conventional chromate conversion coatings can be formed on metals, particularly cold rolled steel, by a dry-in-place aqueous acidic liquid that preferably has a pH value between 0.5 and 5.0 and comprises: (A) "fluorometallate" anions consisting of (i) at least four fluorine atoms, (ii) at least one atom of an element selected from the group consisting of titanium, zirconium, hafnium, silicon, aluminum, and boron, and, optionally, one or more of (iii) ionizable hydrogen atoms and (iv) oxygen atoms; (B) a component of divalent or tetravalent cations of elements selected from the group consisting of cobalt, magnesium, manganese, zinc, nickel, tin, copper, zirconium, iron, and strontium in such an amount that the ratio of the total number of cations of this component to the number of anions in component (A) is at least about 1:5 but not greater than about 3:1; (C) a component selected from the group consisting of phosphorus-containing inorganic oxyanions and phosphonate anions; and (D) a component of polymers of hydroxy styrene, modified by substitution on the aromatic rings of the polymers of substituted aminomethyl moieties, in which the substituents (other than the carbon atom that is directly bonded to an aromatic ring in the polymer) on the amino nitrogen atom jointly contain at least two carbon atoms and at least one hydroxy moiety but neither of these substituents on the amino nitrogen atom individually contains more than half as many hydroxyl moieties as it has carbon atoms, unless it contains only one carbon atom.
IPC 1-7
IPC 8 full level
C23C 22/34 (2006.01); C23C 22/36 (2006.01); C23C 22/50 (2006.01)
CPC (source: EP)
C23C 22/34 (2013.01); C23C 22/36 (2013.01); C23C 22/364 (2013.01); C23C 22/50 (2013.01)
Citation (search report)
- No further relevant documents disclosed
- See references of WO 0132952A1
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
WO 0132952 A1 20010510; AU 1341001 A 20010514; CA 2389343 A1 20010510; DE 60042842 D1 20091008; EP 1246952 A1 20021009; EP 1246952 A4 20041208; EP 1246952 B1 20090826; ES 2334489 T3 20100311; TW 541353 B 20030711
DOCDB simple family (application)
US 0029266 W 20001024; AU 1341001 A 20001024; CA 2389343 A 20001024; DE 60042842 T 20001024; EP 00975346 A 20001024; ES 00975346 T 20001024; TW 89121614 A 20010104