Many casting manufacturers in the casting of paint will think of the first paint, this idea is correct. But before replenishing the paint, we first need to specifically analyze the specific reasons for paint cast steel parts.
- Analysis of the reasons for painting peel off
- Inadequate surface treatment: If the castings are not properly cleaned and rust-proofed during surface treatment, rust and grease will affect the adhesion of the coating and cause the paint to fall off.
- Improper selection of materials: paint and casting surface materials do not match will also lead to insufficient paint adhesion, easy to paint off.
- paint coating is too thick or too thin: paint coating is too thick will lead to the surface drying time is too long, too thin will affect the protective effect of the coating, are easy to lead to paint peeling.
- poor surrounding environment: castings using a complex environment, such as chemical corrosion, high temperature, high humidity, ultraviolet radiation, etc., will affect the adhesion of the casting surface coating.
- Improper operation: Improper operation may lead to uneven paint coating or bubbles, skinning and other problems, affecting the adhesion of paint, resulting in paint film peeling.
- Paint solution measures
- Surface treatment: We should do a good job of surface treatment of castings, remove surface impurities and grease, and use antirust treatment to ensure that the casting surface is flat and the surface cleanliness meets the requirements.
- Material selection: the paint should be matched with the surface material of the casting to ensure the compatibility between the paint and the casting surface.
- Coating thickness: the coating thickness should be moderate, not too thick or too thin, the coating thickness needs to be controlled within the appropriate range to ensure good adhesion.
- Environmental control: the casting environment also needs to be controlled in good conditions, such as the use of anti-chemical corrosion, high temperature and ultraviolet radiation resistant materials to do the coating protection, which can effectively reduce the problem of paint peeling.
- Operation specification: the operator needs to follow the operation specification for painting, to avoid uneven and bubbles, skinning and other problems.
- Summarize
In general, when encountering the problem of paint falling off, we need to find out the reason of paint falling off in time, and then take corresponding solutions to solve the problem, so as to improve the surface performance and internal quality of cast steel parts.
