The ceramic protective film is a ceramic material applied to the metal surface to increase its resistance to high-temperature oxidation and heat resistance. The copper screw has good corrosion and corrosion resistance in all corrosive environments except alkali and hydrofluoric acid. , easy to clean, pleasing appearance and good insulation and other advantages. Ceramics refers to the general term for metal oxides, carbides, borides, tellurides, and nitrides. It has characteristics such as high melting point, high hardness, and brittle performance. Currently, oxides and carbides are used more often, and borides are also used in small amounts. And telluride.
Appropriate use of a sputtering method to spray particles of a ceramic material in a molten state onto the surface of a copper screw to form a coating layer, i.e., a ceramic protective film. Film thickness of less than 0.4 mm is generally referred to as porcelain or enamel, and 0.4 mm or more is generally referred to as a glass lining. The sprayed pottery is suitable for use under high temperature. The sprayed ceramic layer can prevent the intergranular corrosion between the metal and the alloy, acts as a barrier to the corrosive gas, reduces the chance of occurrence of the hot spot, can replace the low-alloyed metal for important parts, and can resist pollutants. The erosion. If immersion plating is used, it needs to be dried and then baked in the oven to form a protective layer with good adhesion.
Metal anti-corrosion technology has a wide range of knowledge and is very rich in content. For corrosion of copper screws, it is necessary to adopt the kind of anti-corrosion measures. It cannot be generalized. For example, the cost of anti-corrosion far exceeds the cost of screw purchase, or it is more economical to directly replace the new screws. Is there any special need? Copper screws that do not use the best anti-corrosion effect are not required.