Preparation method of enamel coating
A coating and enamel technology, applied in the field of enamel coating preparation, can solve the problems of not very firm combination of coating and substrate, incomplete matching of thermal expansion coefficients, cracks, etc., so as to enhance the adhesion of bottom glaze and achieve smooth macroscopic surface. Smooth, crack-reducing effect
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Embodiment 1
[0031] The present embodiment provides a kind of preparation method of enamel coating, comprises the following steps:
[0032] Step 1: pretreatment of the metal substrate;
[0033] Heat the metal substrate at 950°C for 20 minutes for decarburization, put the decarburized metal substrate in a hydrochloric acid solution with a concentration of 18%, pickle it until a clean metal surface is obtained, and then rinse it repeatedly with clean water to remove surface residues. acid solution, and finally place the metal substrate at 200°C for rapid drying and put it in a dry and pollution-free place for later use;
[0034] Step 2: preparation of enamel powder;
[0035] Parts by weight are 35 parts of silicon dioxide, 10 parts of diboron trioxide, 10 parts of aluminum oxide, 1 part of lithium oxide, 0.5 parts of potassium oxide, 1 part of vanadium, 1 part of calcium fluoride, 1 part of cobalt oxide, and 0.5 parts of nickel oxide. 1 part, 1 part of zinc oxide, 0.5 part of molybdenum tr...
Embodiment 2
[0042] The present embodiment provides a kind of preparation method of enamel coating, comprises the following steps:
[0043] Step 1: pretreatment of the metal substrate;
[0044]Heat the metal substrate at 960°C for 25 minutes for decarburization, put the decarburized metal substrate into 18% hydrochloric acid solution, pickle it until a clean metal surface is obtained, and then rinse it repeatedly with clean water to remove surface residues acid solution, and finally place the metal substrate at 220°C for quick drying and put it in a dry and pollution-free place for later use;
[0045] Step 2: preparation of enamel powder;
[0046] Parts by weight are 40 parts of silicon dioxide, 11 parts of diboron trioxide, 11 parts of aluminum oxide, 1.5 parts of lithium oxide, 0.7 parts of potassium oxide, 1.2 parts of vanadium, 1.2 parts of calcium fluoride, 1.2 parts of cobalt oxide, and 0.7 parts of nickel oxide. 1.2 parts of zinc oxide, 0.7 parts of molybdenum trioxide, 1.3 parts ...
Embodiment 3
[0053] The present embodiment provides a kind of preparation method of enamel coating, comprises the following steps:
[0054] Step 1: pretreatment of the metal substrate;
[0055] Heat the metal substrate at 965°C for 30 minutes for decarburization, put the decarburized metal substrate into a 19% hydrochloric acid solution, pickle it until a clean metal surface is obtained, and then rinse it repeatedly with clean water to remove surface residues. acid solution, and finally place the metal substrate at 250°C for quick drying and put it in a dry and pollution-free place for later use;
[0056] Step 2: preparation of enamel powder;
[0057] Parts by weight are 45 parts of silicon dioxide, 13 parts of diboron trioxide, 13 parts of aluminum oxide, 2 parts of lithium oxide, 1 part of potassium oxide, 1.5 parts of vanadium, 1.5 parts of calcium fluoride, 1.5 parts of cobalt oxide, and 1 part of nickel oxide. 1.5 parts of zinc oxide, 1 part of molybdenum trioxide, 2 parts of iron o...
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