Sandblasting is a process of cleaning and roughening the surface of a substrate by the impact of high-speed sand flow. Compressed air is used as power to form a high-speed jet beam to spray materials (copper ore, quartz sand, emery, iron sand, Hainan sand) to the surface of the workpiece to be treated at a high speed, so that the appearance or shape of the outer surface of the workpiece surface changes. , Due to the impact and cutting effect of the abrasive on the surface of the workpiece, the surface of the workpiece can obtain a certain degree of cleanliness and different roughness, so that the mechanical properties of the workpiece surface are improved, thus improving the fatigue resistance of the workpiece, increasing its and coating The adhesion between the layers prolongs the durability of the coating film and also facilitates the leveling and decoration of the paint.
The pretreatment stage of the sandblasting process refers to the treatment that should be carried out on the surface of the workpiece before the workpiece is sprayed and sprayed with a protective layer.
The quality of the pre-treatment of the sandblasting process affects the adhesion, appearance, moisture resistance and corrosion resistance of the coating. If the pretreatment work is not done well, the rust will continue to spread under the coating, causing the coating to fall off in pieces. The surface that has been carefully cleaned and the workpiece that is generally cleaned simply can be compared with the coating by exposure method, and the lifespan can be 4-5 times different. There are many methods of surface cleaning, but the most commonly accepted methods are: solvent cleaning, pickling, hand tools, power tools.
Post time: Jul-01-2022