公开(公告)号：US20200048775A1

公开(公告)日：2020-02-13

申请号：US16499003

申请日：2018-03-27

Applicant: TATA STEEL IJMUIDEN B.V.

Inventor： Chiel Matthias DANE ,  Richard Johannes VAN DER NET

IPC: C23C22/53 ,  C23C22/34 ,  B05D3/10 ,  B05D7/14 ,  C10M177/00 ,  C10M107/50 ,  C10M101/02 ,  C10M111/04

Abstract: An aqueous acidic composition for treating metal surfaces, the composition including the following components: a) at least one water soluble or water dispersable anionic polyelectrolyte; b) at least one organofunctional silane including one or more reactive functional groups selected from the group including amino, mercapto, methacryloxy, epoxy and vinyl; c) at least one water dispersible solid wax wherein the weight ratio between components a:b is in the range of 1:2-4:1, based on dry matter; the weight ratio between components (a+b):c is in the range of 1:3-3:1, based on dry matter, and wherein components a and b may be present—at least partially—as their graft reaction product. Another aspect is a treating method using this composition and use of the thus treated metal surface.