The surface treatment is mainly for the purpose of increasing the anti-corrosion performance, and some of the color is also taken into account, so it is mainly for carbon steel products, which generally require surface treatment. Common surface treatments include: blackening, galvanizing, copper plating, nickel plating, chrome plating, silver plating, gold plating, dacromet, hot dip galvanizing, etc.; there are many types of galvanizing, blue and white zinc, blue zinc, white Zinc, yellow zinc, black zinc, green zinc, etc., are also environmentally friendly and environmentally friendly. Each plating has a variety of coating thickness to meet different salt spray test results.
1.Bolt
A type of fastener consisting of a head and a screw (a cylinder with an external thread) is required to be fitted with a nut for fastening the two parts with through holes. This type of connection is called a bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.
2. Stud
A type of fastener that has no head and only has threads on both ends. When connecting, one end must be screwed into the part with the internally threaded hole, the other end is passed through the part with the through hole, and then the nut is screwed, even if the two parts are fastened together in one piece. This type of connection is called a stud connection and is also a detachable connection. It is mainly used in the case where one of the connected parts has a large thickness, requires a compact structure, or is frequently used for disassembly, and should not be bolted.
