How to make thermal spray anti-corrosion and wear-resistant coating

       Thermal spray anti-corrosion and wear-resistant coatings are mainly composed of base materials, fillers and other additives. Among them, organic polymers and ceramic material mixtures are used as the base materials of the coating, and other components are bonded on the surface of the friction parts to form a continuous film, which greatly improves the anti-corrosion and wear resistance of the material and reduces the wear of the material surface.



The production process of the anti-corrosion and wear-resistant coating is as follows:



1. Substrate surface pretreatment (purification and roughening of the construction site)



1. Grind the surface of the part to be constructed by sandblasting to expose the fresh metal substrate, and the rust removal standard reaches Sa2.5 level



2. Clean the powder and dust on the surface of the machine with a special cleaning agent or a dry rag. The surface of the treated substrate should be rough, clean and dry.



2. Preheating



The purpose of preheating is to eliminate the moisture on the surface of the workpiece, increase the temperature of the surface of the body during spraying, and reduce the residual stress caused by the difference in expansion between the substrate and the coating material, so as to avoid cracking of the coating and improve the bonding strength of the substrate.



4. Spraying

Spraying is the main body and key process of the entire thermal spraying process. There are many spraying methods, and which method to use for spraying mainly depends on the selected spraying materials, the working conditions of the workpiece and the coating quality requirements.

Five, curing:



After the protective wear-resistant coating is completely cured (24 hours at room temperature), it can be put into use.



Precautions:



1. When preparing the material, the weighing should be accurate, the mixing should be uniform, and the adhesive layer should be compacted when smearing



2. When the temperature is lower than 15 degrees, the coating is slow to cure and the curing is incomplete. After the coating is initially cured, it can be heated to 80 ° C ~ 100 ° C for 2 hours with an iodine tungsten lamp or electric hot air.