Machined parts of motors, especially cast iron components such as the frame, end covers, and bearing covers, undergo rust prevention treatment after casting. This involves applying rust-preventive paint to the surface of the parts to prevent material damage during storage, processing, and use. However, many casting plants, for various reasons, fail to perform rust prevention treatment on the parts or use substandard rust-preventive paint, ultimately leading to varying degrees of corrosion in the castings and negatively impacting the final surface coating of the motor.
Reputable motor manufacturers will perform thorough rust prevention treatment on the surfaces of components before applying a topcoat. The topcoat can be painted in different colors according to customer requirements or the motor manufacturer's specifications to achieve a harmonious effect with the equipment. However, motors with special requirements must be painted in specific colors; for example, motors used in fire-fighting environments are generally required to be red. It is important to emphasize that the topcoat cannot replace the rust-preventive primer. Manufacturers should follow the prescribed procedures to ensure the motor's compliance during production and subsequent use.
Comparison of water-based paints and oil-based paints
●Environmental performance: Water-based paints use only water as a thinner and are harmless to human health. Oil-based paints use banana oil and thinner as thinners, which contain large amounts of harmful carcinogens such as benzene and xylene.
●Odor. Water-based paint does not contain harmful carcinogens, is non-toxic and odorless, and allows for immediate occupancy after painting. Oil-based paint has a strong, pungent odor.
●Appearance. Water-based paints do not contain harmful substances and do not evaporate into the air, thus avoiding defects such as yellowing and staying new for longer. Oil-based paints, on the other hand, continuously release harmful substances over a long period, making them prone to yellowing and less durable.
●Film quality. The new generation of water-based paints are in no way inferior to oil-based paints in terms of film fullness, hardness, and scratch resistance. They can also create the "wood-visible-but-paint-invisible" effect unique to high-end furniture, an effect that oil-based paints cannot achieve. Oil-based paints produce a better film quality, but the film is harder and more brittle, making it difficult to repair after damage.
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