Abstract: Coating composition suitable for coating a metal, preferably steel, substrate which is intended to be fabricated and overcoated, said composition comprising: i) zinc powder and/or a zinc alloy and ii) a modified silica sol comprising colloidal silica particles modified with 6-40 wt % of one or more silane compounds, based on the combined dry weight of silane compound(s) and colloidal silica particles, and being obtainable by adding said silane compound(s) to a silica sol with a rate of not more than 20 silane molecules per nm2 colloidal silica surface per hour. This coating composition has a relatively long pot life, good white rust resistance, and good film properties.
Type:
Application
Filed:
April 16, 2008
Publication date:
May 13, 2010
Applicant:
Akzo Nobel Coating Internatinal B.V.
Inventors:
Victoria Browne, Paul Anthony Jackson, Alistair James Reid, Peter Harry Johan Greenwood