Title (en)

PRETREATMENT COMPOSITION FOR PHOSPHATISING FERROUS METALS, AND METHOD OF PREPARING THE SAME

Publication

EP 0056675 A3 19820804 (EN)

Application

EP 82200062 A 19820119

Priority

JP 702881 A 19810119

Abstract (en)

[origin: EP0056675A2] An aqueous composition for the treatment of ferrous metal surfaces is a solution comprising: (a) titanium compound in amount from 1 to 100 parts per million by weight, measured as titanium; (b) phosphate and/or acid phosphate in amount totalling from 50 to 1500 parts per million by weight, measured as PO4; (c) pyrophosphate in amount from 10 to 300 parts per million by weight, measured as P2O7; and (d) carbonate and/or acid carbonate in amount totalling 20 to 1500 parts per million by weight, measured as CO3; the solution having a pH from 8.5 to 9.5.

IPC 1-7

C23F 7/10

IPC 8 full level

C23C 22/80 (2006.01)

CPC (source: EP)

C23C 22/80 (2013.01)

Citation (search report)

• [Y] DE 885638 C 19530806 - METALLGESELLSCHAFT AG
• [Y] FR 1291347 A 19620420 - PARKER STE CONTINENTALE
• [Y] GB 774667 A 19570515 - JOHN ARTHUR KEMP
• [A] FR 2093664 A5 19720128 - BALM PAINTS LTD
• [A] FR 2154796 A1 19730511 - AMCHEM PROD
• [A] US 2490062 A 19491206 - JERNSTEDT GEORGE W

Designated contracting state (EPC)

AT BE DE FR GB IT NL SE

DOCDB simple family (publication)

EP 0056675 A2 19820728; EP 0056675 A3 19820804; EP 0056675 B1 19841128; AT E10513 T1 19841215; DE 3261311 D1 19850110; JP S57120678 A 19820727; JP S5855229 B2 19831208

DOCDB simple family (application)

EP 82200062 A 19820119; AT 82200062 T 19820119; DE 3261311 T 19820119; JP 702881 A 19810119