Corrosion protection pigment comprising coated metal particles and its use

An anti-corrosive coating composition containing metal particles in quantities of 30 to 70 w/w, relative to the coating composition and an inorganic binding agent,

• wherein the inorganic binding agent is selected from the group consisting of a silane, a silanol, a silane hydrolysate, a polysiloxane, a silicate, a titanate, and mixtures thereof,
• wherein the metal particles include at least one metal selected from the group consisting of zinc, aluminum, magnesium, alloys thereof and mixtures thereof;
• wherein the metal particles have an inorganically based surface modification in the form of a coating layer and are capable of imparting cathodic corrosion protection;
• wherein the inorganically-based surface modification is limited to a coating layer formed by an oxide selected from the group consisting of silicon dioxide, a titanium oxide and mixtures thereof,
• wherein the inorganic-based surface modification has a layer thickness in the range of 3-150 nm, and
• wherein the coating composition applied to a metal substrate provides cathodic corrosion protection to the metal substrate.