Three key points to pay attention to before painting the combination nut, what is the painting of the combination fastener screw. Spraying is a spraying method that uses a spray gun or a butterfly atomizing core to separate into uniform and fine particles by pressure or centripetal force, and then wipes the surface of the object to be coated. So, how to do the pretreatment of combined fastener screws? Let me introduce maijin below. Selection of metal spraying processing technology. Metal spraying can be divided into air spraying, airless spraying, electrostatic powder spraying and various derivative forms of the above basic spraying methods, such as high flow and low pressure atomization spraying, arc spraying, automatic spraying, multiple spraying, etc. Relevant spraying treatment methods should be judged according to the application conditions of different materials. Combination fastener screw painting pretreatment. Degreasing→Water cleaning→Pickling antirust treatment→Water cleaning→Combination→Water cleaning→Surface conditioning→Linization→Water washing→Air drying→Spraying/i.e. electrostatic powder spraying (the basic standard degreasing and pickling antirust treatment process usually takes more than 25 minutes for each process). 1: When there is no rusty product workpiece, the processing procedure is as follows. Pre-degreasing→degreasing→boiling water washing→cold water washing→cold water washing→pre-surface adjustment→surface adjustment→lining→cold water washing→pure water cleaning (1)→pure water cleaning (2). 2: If there are rusty product workpieces, the processing procedure is as follows. Pre-degreasing → degreasing → boiling water washing → cold water washing → pickling → cold water washing → surface conditioning → linting → cold water washing → pure water washing (1) → pure water washing (2). The above is about what we recommend to you now, a lot of information about Xuzhou fasteners, please pay attention to our website for a long time.