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Surface treatment

  • Author:Michelle
  • Source:Www.xy-global.com
  • Release on :2018-07-13
First, what is the surface treatment 

  Surface treatmentA surface process is formed on the surface of the base material that is different from the mechanical, physical or chemical properties of the body. The purpose of our surface treatment is to achieve a certain degree of corrosion resistance, wear resistance, decorative or other special functional requirements. There are different surface treatment methods and processes for different products.

Second, the origin of surface treatment

  Surface treatment is the oldest technology. Since humans have been on the earth, surface treatment has become the earliest technology that humans have mastered. Primitive human life is extremely difficult, living a group life, in order to survive, they make stone tools and apply grinding technology to make stone tools sharp. In the Neolithic Age, the original stoneware used by the primitive people was ground, and the surface was delicate and smooth, paying attention to the decorative effect, which has become the mainstream of the times.
  In the primitive society, as important as the grinding stone is the original coating technology. Primitive humans have a sense of beauty. In the late Paleolithic period, they used ore dyes to paint and paint small personal items. In the Neolithic period, the invention of pottery made the original color coating technology reach its peak, forming a famous pottery art in history, and unveiling the prelude of surface treatment coating technology.

Third, how to surface treatment of products

   The surface treatment we generally talk about may simply refer to the result of plating or treatment on the surface of the product. This is a narrow sense. The broader term should be a set of processes that includes the entire surface treatment. One of the most important aspects is pre-processing.
   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 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.

Fourth, what are the types of surface treatment?

   1.Manual processing:This is also the simplest surface treatment, such as a scraper, wire brush or grinding wheel. The rust and scale on the surface of the workpiece can be removed by hand, but the manual treatment is labor intensive, the production efficiency is low, the quality is poor, and the cleaning is not thorough.
   2.Chemical treatment:This surface treatment method mainly uses an acidic or alkaline solution to chemically react with oxides and oil stains on the surface of the workpiece to dissolve it in an acidic or alkaline solution to remove rust scale and oil stain on the surface of the workpiece. This can be achieved by cleaning the brush roller made of nylon or the 304 stainless steel wire brush. Chemical treatment is suitable for cleaning thin sheets.
   3.Mechanical processing:It mainly includes wire brush roller polishing method, shot blasting method and shot peening method. The polishing method is that the brush roller is driven by the motor, and the brush roller rotates the iron oxide skin at a high speed on the upper and lower surfaces of the strip in a direction opposite to the movement of the rolled piece. The brushed iron oxide scale is washed away by a closed circulation cooling water flushing system. Shot blasting is a method of accelerating the projectile by centrifugal force and projecting it to the workpiece for rust removal.
   4.Plasma treatment:WaitIon, also known as plasma, is a collection of positively charged positive and negative particles (including positive ions, negative ions, electrons, free radicals, and various reactive groups), in which the positive and negative charges are equal. Therefore, the plasma is the fourth state-plasma state in which substances other than solid, liquid, and gaseous states exist.

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