Surface treatment A process for artificially forming a surface layer on the surface of a substrate material that differs from the mechanical, physical, and chemical properties of the substrate. The purpose of surface treatment is to meet the corrosion resistance, wear resistance, decoration or other special functional requirements of the product.
Generally speaking, there are two explanations for surface treatment in China, one is generalized surface treatment,
That is, it includes various physical and chemical methods such as pretreatment, electroplating, coating, chemical oxidation, thermal spraying, etc.; the other is narrow surface treatment, that is, only including sandblasting, polishing, etc. The pre-processing part. What we are talking about below is mainly the narrow surface treatment.
During the processing, transportation, storage, etc. of the workpiece, the surface often has molding sand, welding slag, dust, oil and other contaminants left by scale and rust. If the coating can be firmly attached to the surface of the workpiece, the surface of the workpiece must be cleaned before painting. Otherwise, it will not only affect the adhesion and corrosion resistance of the coating to the metal, but also make the base metal even if it is coated. Corrosion can also continue under the layer protection, causing the coating to peel off, affecting the mechanical properties and service life of the workpiece. Therefore, the surface treatment before the painting of the workpiece is an important guarantee and measure for obtaining a good quality protective layer and prolonging the service life of the product.
As far as the general surface treatment industry is concerned, its development in China is very immature, there are many technical blanks, lack of relevant information, and insufficient attention. This has resulted in low level of surface treatment technology in China and slow development, and lack of relevant talents.
