Silicon-titanium alloy film coat of air preheater tube and electrostatic spraying process thereof
An air preheater and electrostatic spraying technology, applied in the direction of liquid spraying equipment, etc., can solve the problems of affecting health, plastic powder is not resistant to high temperature, low efficiency, etc., and achieve the effect of prolonging service life, controllable thickness, and uniform coating
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Embodiment 1
[0021] Electrostatic spraying process of silicon-titanium gold film air preheater tube:
[0022] (1) common silicon-titanium gold powder (the source is purchased in Zhenjiang, the composition content SiO 2 50-60%, NiO 1-5%, B 2 o 3 10-15%, TiO 2 12-15%, Pb 2 o 3 5-10%, NaO 2 10-15%) with K 2 O is mixed according to the mass ratio of 98:2, first crushed and then dried and crushed, so that the surface of the powder can be charged;
[0023] (2) Use a shot blasting machine to remove the oil, dust, and rust on the surface of the air preheater tube workpiece. After pretreatment, the workpiece is not only free of oil, rust, and dust on the surface, but also forms a layer on the original silvery white shiny surface. Uniform, rough, corrosion-resistant gray phosphating film that is not easy to rust and can increase the adhesion of the spray coating, which can prevent rust and increase the adhesion of the spray coating;
[0024] (3) When the processed workpiece is rotated at...
Embodiment 2
[0040] Electrostatic spraying process of silicon-titanium gold film air preheater tube:
[0041] (1) Combine ordinary silicon-titanium gold powder with K 2 O mixed according to the mass ratio of 95:5, first crushed and then dried and crushed, so that the surface of the powder can be charged;
[0042] (2) Use a shot blasting machine to remove the oil, dust, and rust on the surface of the air preheater tube workpiece. After pretreatment, the workpiece is not only free of oil, rust, and dust on the surface, but also forms a layer on the original silvery white shiny surface. Uniform, rough, corrosion-resistant gray phosphating film that is not easy to rust and can increase the adhesion of the spray coating, which can prevent rust and increase the adhesion of the spray coating;
[0043] (3) Rotate the processed workpiece at a constant speed at a speed of 50 rpm, and when the vertical speed of three meters per minute passes through the spraying station, use electrostatic powder spr...
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