Decoration method for ceramic over-glaze pigment with high corrosion resistance

The invention discloses a decoration method for ceramic over-glaze pigment with high corrosion resistance.The ceramic over-glaze pigment comprises, by weight, 24% of quartz, 46.7% of boric acid, 11.7% of aluminum oxide, 3.7% of lithium carbonate, 1.6% of potassium nitrate, 1.2% of sodium carbonate, 6.5% of light calcium carbonate, 0.7% of niobium pentoxide and 3.9% of tantalum pentoxide.The decoration method includes supplementing deficient quartz materials in a silica sol form into molten fusing agents in a matched manner after the fusing agents are molten instead of adding the quartz materials into the fluxing agents when the fluxing agents are mixed with one another; carrying out enamel firing; coating the fusing agents and the quart materials with aluminum sol, sodium metaaluminate and aluminum tri-sec-butoxide and then carrying out secondary enamel firing to obtain high-aluminum cover layers.The decoration method have the advantages that triple protection effects can be realized by the high-aluminum cover layers, compounded and added silica sol instead of the quartz and transition metal oxide and the like, and accordingly the ceramic over-glaze colored pigment with the alkali resistance meeting 0-grade standards during European Union dishwasher safety tests can be obtained; the melting temperatures of the fusing agents can be reduced, accordingly, energy consumption can be reduced to a great extent, and the decoration method has an obvious economic benefit.