Raymond Machinery Co.,Ltd as s supplier of casting parts, not only can do further processing as per customers’ requirement, but also can do different kinds of surface treatment before or after further processing. Today, engineer is going to share the purpose of different surface treatment.
1, Sprengung des Schusses
Purpose:
Removes surface scale, rust, and other contaminants. For example, after a casting is removed from its mold, shot blasting can clean off the mold release agents and any oxides that have formed.
It also roughens the surface slightly, which can improve the adhesion of subsequent coatings like paint or powder coatings. In the automotive industry, engine blocks are often shot – blasted before painting to ensure good paint adhesion.
2, Das Beizen
Purpose:
Prepares the casting surface for further treatment such as plating or painting. In the steel casting industry, pickling is a common pretreatment step before electroplating to ensure good adhesion of the plated metal.
Removes rust and scale from the casting. For example, when old or corroded cast iron parts are refurbished, pickling can be used to remove the rust layer.
3, Die Passivierung
Purpose:
Enhances the corrosion resistance of stainless – steel castings. The passive layer protects the underlying metal from chemical attack and rusting. In the food processing and medical industries, where stainless – steel equipment is used, passivation is an important step to ensure the longevity and hygiene of the equipment.
4, Galvanisierung
Purpose:
Provides a decorative finish. For example, chrome – plating is used on automotive parts like bumpers and trim to give a shiny, attractive appearance.
Can also improve corrosion resistance. Zinc – plating is a common method for protecting steel castings from rust, as zinc acts as a sacrificial anode.
Increases wear resistance. Hard chrome – plating can be used on machine parts like shafts and gears to reduce wear.
5, Eloxierung
Purpose:
Increases the corrosion resistance of aluminum castings. The anodized layer acts as a barrier against environmental factors.
Can be used for decorative purposes as the anodized layer can be dyed in various colors. For example, aluminum window frames are often anodized and colored to match the building’s exterior design.
6, Die Malerei
Purpose:
Provides a decorative finish to the casting. In the furniture industry, cast – metal furniture legs are often painted to match the overall design of the furniture.
Protects the casting from corrosion and environmental factors. For example, outdoor cast – iron fences are painted to prevent rust and weathering.
7, Pulverbeschichtung
Purpose:
Provides a durable and decorative finish. Powder – coated metal castings are used in a wide range of applications, from industrial equipment to consumer products like bicycles and household appliances.
Offers excellent corrosion resistance. The cured powder coating forms a thick, protective layer that can withstand harsh environmental conditions.