Aluminum alloy doors and windows have been widely used in life, and their quality, material and performance have been recognized. Friends who have aluminum alloy doors and windows at home may find that aluminum alloy doors and windows will have some defects after being used for a long time, such as paint shedding. Today, let's learn what materials are used for spraying aluminum alloy doors and windows? How to repair the paint of aluminum alloy doors and windows?
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what materials are used for spraying aluminum alloy doors and windows?
1. Surface treatment of aluminum alloy doors and windows is common now: anodic oxidation, electrophoresis, powder spraying, fluorocarbon spraying, etc.
2. Fluorocarbon spraying is a kind of Electrostatic spraying and also a liquid spraying method, which is called fluorocarbon spraying and Hong Kong is called fluff. It belongs to high-grade spraying, so the price is relatively high and has already been applied abroad. Fluorocarbon spraying has excellent anti-fading, anti-frost, anti-air pollution (acid rain, etc.) corrosion resistance, strong UV resistance, strong crack resistance and can withstand severe weather environment. It is beyond the ordinary paint.
3. Generally speaking, the weather resistance of these surface treatments increases step by step according to the previous arrangement, but it cannot be generalized. Specific analysis is required because the thickness of the coating, coating materials, there are many influencing factors such as technology.
4. In addition, it depends on whether the location of the project is coastal or inland, the corrosion degree of the surrounding environment and other factors to determine the type and thickness of the coating you choose.
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how to repair the paint of aluminum alloy doors and windows?
1. Grinding
find a cuboid and hold it by hand. Wrap one of the relatively flat sides with sandpaper, press it by hand and polish it. The direction order of the grinding plane is: first horizontal and then vertical. When polishing, you must first go up and down, first outside and then inside. The selection of sandpaper is first thick and then thin. The corners, shapes and details of aluminum alloy doors and windows need to be used. The effect of grinding, on the one hand, is to remove the impurities on the original paint and paint surface, on the other hand, is to increase the adhesion of the new paint.
2. Preparation before painting
after polishing, see if there is any uneven place in the aluminum alloy doors and windows. If there is, use putty to level it and polish it to a flat state again. Then protect the surrounding aluminum alloy doors and windows and the floor to prevent paint from polluting these places. Wipe aluminum alloy doors and windows with wet towel with little moisture. Stir the barrel paint evenly with a small stick, and do not move too fast to prevent splashing.
3. Conduct painting
when brushing the first wood lacquer, primer adjustment is a very important process. Primer adjustment also needs to know the density of wood wares. Those relatively hard wood wares have high density, so primer can be adjusted thinner, and the soft wood primer should be a little sticky. At the beginning of painting, apply evenly along the lines of Woodware. Don't apply too thick. After the wood lacquer is completely dry, use sand-papering to polish it until you feel smooth, it's OK if there is no bulge, then wipe it with a soft damp cloth several times, and finally dry it.
The use of Brush coating can make the length of penetration of wax oil larger, and also speed up the construction. After brushing the paint for the second time, you need to adjust it a little thinner. After brushing, you can cover the wood lacquer of the first brush, and then use the waterproof abrasive paper above 500 mesh to polish it in the direction of painting, and polish it evenly. Using wiping can save wood lacquer of the usage. After the second paint or the last paint is dry, wipe the surface of the woodware with a clean cotton cloth immediately to make the surface of the woodware smooth. After brushing the paint for the third time, it should be polished with waterproof abrasive paper thinner and dipped in water thinner. The grinding strength should be even, and it should not be too heavy or too light. After being painted for the last time, you don't need to polish it. You can put on a layer of aluminum alloy doors and windows protection wax. Add the number of times of wiping, and polish it with fine sandpaper every time after coating, and wipe it with thin wiping and table drying for the last time to obtain the effect of high-grade aluminum alloy doors and windows.
4. Paint protection
usually, after the aluminum alloy doors and windows are painted, they should be painted with varnish to protect and brighten the paint layer. The varnish is also consistent with the paint brushing method, but the amount of paint dipped in paint brush each time is relatively small, and the number of times the varnish is spread out and the wrist is waved more often. Varnish is recommended to be used at least twice. If there is a phenomenon of hair brush shedding, the hair dropped must be dealt with in time. Pay attention to the varnish only brush the surface of aluminum alloy doors and windows without brush inside.
