Ceramic coating on metal
AssigneeEka Nobel AB
InventorsBozena Tokarz, Bernt Larsson, Sven Jaras
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Abstract
The invention relates to a composition for forming a heat-insulating ceramic coating on a metal, said composition comprising, in % by weight: 10-50% of potassium silicate 10-50% of silica 5-40% of inorganic filler 1-25% of ceramic fibres 2-40% of water 2-20% of hollow microparticles 0-5% of surface active agent. The invention also relates to a method for preparing a composition having the above-mentioned components. Furthermore, the invention relates to the use of the composition comprising the above-mentioned components, for application to internal combustion engine exhaust pipes. Finally, the invention relates to internal combustion engine exhaust pipes coated with layers of the above-mentioned composition.
Claims7
A composition for forming a heat-insulating ceramic coating on a metal, comprising:
- (i) 10 to 50% by weight of potassium silicate;
- (ii) 10 to 50% by weight of colloidal silica;
- (iii) 5 to 40% by weight of inorganic filler;
- (iv) 1 to 25% by weight of ceramic fibres;
- (v) 2 to 40% by weight of water;
- (vi) 2 to 20% by weight of hollow microparticles;
- and
- (vii) 0 to 5% by weight of surface active agent.
Dependencies are inferred from the claim text.