Treatment and Application of Metal Spraying Electroplating Process
Metallic Spraying is the process of spraying molten metal with a compressed air or an inert gas onto the metal surface to form a protective coating. When the metal is sprayed, the plating material is melted and atomized in a special spout or spray gun and sprayed onto the base material. This method is sometimes called metal spraying. Generally use oxygen-acetylene flame, but sometimes also use other gases. When the plated wire is automatically fed through the flame, the wire melts and is atomized and sprayed onto the base material at the same time by the compressed air stream. Almost any metal that can be made into a wire can be sprayed in this way. Another gun is sprayed with a powder through a powder. The advantage of this method is not only to spray metal, but also to spray metal-ceramic composite materials, oxides and hard alloy.
Prepare the surface before spraying
Since the bonding between the plating material obtained by the metal sputtering and the base material is a purely mechanical bond, the base material must be properly pretreated. So that good mechanical bonding can be achieved. Regardless of the surface preparation method, the substrate surface must be clean and free of oil.
The most commonly used surface preparation method is sandblasting. To this end, the sand is sharp enough to produce a truly rough surface. For a cylindrical surface that can be turned on a lathe, an effective method is to drive a very thick thread and then gently roll the crest with a roll press. One way to improve the plane is to cut a series of parallel grooves with a circular grooved knife and then take the edges between the grooves with a knurling knife. If the coated surface is to be machined, the substrate surface should be prepared by roughing or grooving to get the best preparation.
Application of metal spraying
Metallic Spraying has many important uses in product design. A protective coating can be obtained by spraying zinc and aluminum onto the surface of the steel to obtain corrosion resistance. Because metal sprays can spray metal onto almost any metal or nonmetallic surface, it provides a simple way to coat a conductive surface on a poor conductor or nonconductor surface. For this reason, copper Or silver sprayed onto glass or plastic. Since the sputtered metal can be treated in a variety of different ways, such as polishing, brushing, or retaining the sputtering state, the sputtered metal can be used as a decorative means in the product and construction industry