Patent · US Expired

Surface treatment of metal strip

US4231812A · kind A · utility

5Cited by

7References

17Claims

0Family size

Assignee

Centre De Recherches Metallurgiques-Centrum Voor Research in De Metallurgie · BE

Inventors

Philippe Paulus · Liège, BE
Jules Hancart · Jupille, BE

Key dates

Filing date	Mar 13, 1979
Grant date	Nov 4, 1980
Priority date	—
Expiry date	Mar 13, 1999

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C22/78
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Metal strip, particularly steel strip, is heated to above 250.degree. C. and quenched in a phosphating bath, at 80.degree. C. or more, containing one or more phosphates of the type Me (H.sub.2 PO.sub.4).sub.n, where Me=Zn, Ni, Mn, or an alkali metal, at a concentration of 1 to 20 g/l.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.