Water-based protective coating capable of adhering to high temperature billet and preparation method thereof
A protective coating, water-based technology, applied in the direction of sustainable manufacturing/processing, coating, climate sustainability, etc., to reduce heat dissipation, reduce oxidation loss, and improve descaling effect
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Embodiment 1
[0030] Clay, magnesite, magnetite and steel slag are mixed according to the chemical composition ratio of dry material: 50wt% MgO, 15wt% Al 2 o 3 , 15wt% ZnO, 5wt% CaO, 5wt% SiO 2 , 2wt% Fe 2 o 3 , 3wt%Na 2 O, 2wt%K 2 O, 3wt% rare earth and other components, and then ball milled to below 300 mesh; the density of the powder is adjusted to 1.45g / cm by adding water 3 ; Sodium carboxydodecylbenzene sulfonate and sodium citrate were put into water according to mass fraction 0.2%, 0.5% and stirred respectively, and then ZnSO was added according to mass fraction 10%, 5% respectively 4, ZnO was added to the previously prepared liquid, and stirred at 60° C. for 3 minutes to form a sol; 5% mass fraction of the sol was added to the above coating to obtain the coating. The paint is sprayed on the surface of the room temperature Q235 billet to form a light yellow protective coating. After leaving the heating furnace, the iron oxide scale is obviously thinned, and the oxidation burni...
Embodiment 2
[0032] Clay, magnesite, diatomite, magnetite and Ni slag are mixed according to the chemical composition ratio of dry material: 40wt% MgO, 15wt% Al 2 o 3 , 20wt% ZnO, 8wt% CaO, 2wt% Fe 2 o 3 , 5wt% SiO 2 , 2wt% NiO, 3wt% Na 2 O, 2wt%K 2 O, 3wt% rare earth and other components, and then ball milled to below 300 mesh; the density of the powder is adjusted to 1.3g / cm by adding water 3 ; Sodium carboxymethyl cellulose and sodium citrate were put into water according to mass fraction 0.2%, 0.5% and stirred respectively, and then ZnO, ZnSO were respectively mixed according to mass fraction 10%, 5%. 4 Add it to the previously prepared liquid, and stir at 70°C for 4 minutes to make a sol; add 4% mass fraction of the sol to the above coating, and finally add 2wt% low-melting glass powder to obtain the coating. The paint is sprayed on the surface of Q235 steel billet at about 700°C to form a light yellow protective coating. After leaving the heating furnace, the iron oxide scale ...
Embodiment 3
[0034] Clay, magnesite, diatomite, magnetite and blast furnace slag are mixed according to the chemical composition ratio of dry material: 35wt% MgO, 12wt% Al 2 o 3 , 30wt% ZnO, 5wt% CaO, 3wt% Fe 2 o 3 , 5wt% SiO 2 , 5wt%Na 2 O, 2wt%K 2 O, 3wt% rare earth and other components, and then ball milled to below 300 mesh; the density of the powder is adjusted to 1.2g / cm by adding water 3 ; Sodium carboxymethyl cellulose and sodium citrate were put into water according to mass fraction 0.2%, 0.5% and stirred respectively, and then ZnO, ZnSO 4 , Zn(OH) 2 Add it to the previously prepared liquid, and stir at 80°C for 5 minutes to make a sol; add 4% mass fraction of the sol to the above coating, and finally add 3wt% low-melting glass powder to obtain the coating. Spray the paint on the surface of Q235 steel billet at about 1050℃ to form a layer of milky white protective coating. After leaving the heating furnace, the iron oxide scale is obviously thinned, and the oxidation burni...
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