Treatment solution for coating a galvanised or alloy galvanised steel band, method for applying same and a galvanised or alloy galvanised steel band with a coating composed of the received treatment solution for improving deformation behaviour

摘要

Aqueous, chromium-free treatment solution (I) for the production of metal sheets flexible without oil supply, comprises 1-40 g/l of manganese(II)-ions and/or molybdenum-containing oxo-anions, with which the molybdenum exhibits an average oxidation degree of 4-6, 10-150 g/l of phosphate ions and 0.5-10 g/l of a dissolved or dispersed wax, where (I) exhibits a pH value of 1.5-3.5. Independent claims are included for: (1) a method for applying a coating on a metal band made of galvanized or alloy galvanized steel, comprising bringing the metal band in contact with (I) for a duration of 1-10 seconds and then drying (I) without rinsing, which is applied on the metal band; (2) the metal band made of galvanized or alloy galvanized steel comprising a coating, obtained by the above process; and (3) a process for the production of a non-flat component made of galvanized or alloy galvanized steel, comprising separating a part from a metal band and shaping this part without oil supply.