The information about the anti-corrosion centrifugal fan is justified, it must be the anti-corrosion data, so for this equipment, what about its spraying process, let's take a look at it in detail:
①Appearance disposal
The sprayed plastic base material is carbon steel, and the rust removal can be done by pickling or machine sandblasting. The purification process can also be suspended for the main parts. The work piece must first go through the sequence of degreasing and removing the oxide film. The radical degreasing method is to use low-temperature burning or alkaline fusion to clean. The adhesion of polyphenylene sulfide to non-metallic substrates is very non-contact with the nominal processing of the work piece.
②Plastification
After the parts of the anticorrosive centrifugal fan sprayed with suspension liquid are monotonous, the low-temperature plasticization is stopped. The plasticization measurement is normally 320 to 340 degrees Celsius, and the time is 10 to 20 spraying three times, and the first plasticizing The melting time is 60 minutes. After being stored in the furnace, it is immediately quenched in cold water, which can make the nominal smoothness, increase the toughness, and increase the adhesion of the insulating layer to the non-metal.
③Spraying construction
The anticorrosive centrifugal fan powder spraying uses indirect powder spraying guns, using a contaminated compact atmosphere, and the pressure is zero one by one MPa. The sprayed parts can be stopped cold spraying or heat spraying after the parts are transferred. Without a certain spraying method, the thickness of each spray should not be too thick, or cracks, wrinkles, tears and other phenomena. The coating is a suspension and can also be applied by showering, dipping and brushing, but no hanging drips and flowing phenomena are allowed. When the suspension spray coating is a suspension, the No. 1 spray gun can be used, and the contaminated compact atmosphere is used. The pressure is 0.05 to 0.1 MPa, and the spray gun bolt is nominally about 20 mm away from the workpiece. The plastic spray should not be too thick at one time, it is better that there is no sagging. The thickness of the previous spraying is 0.2 to 0.04 meters. If the work is small, heat can be transferred. With polyphenylene sulfide as the coating and the spraying process of carbon steel as the base material, there are normally two ground-breaking methods.
④Request for base material
Nominally clean and smooth, no rust, no dirt, no oil. There are no pinholes, plants, follicles, honeycombs, sand holes and edges and corners, and the welds are flat and smooth, and the corners should have semi-circular arcs with a radius of more than five millimeters. To have a certain strength, the plastic anticorrosive centrifugal fan must be able to withstand the external forces of all races during the processing day. There is no deformation, no damage, no oxidation at the low temperature of the plastic insulation layer processing.
The above mentioned in detail about the spraying process of the anticorrosive centrifugal fan. It should be noted that you should pay attention to the standard operation in the future use. In addition, you should stop the maintenance regularly, and promptly rectify and repair the problem after it is found, so that you can use it more sustainably.
