Solution: How to strengthen the surface treatment and coating protection of stainless steel gratings?
Dec 09,2024
1. surface treatment technology
electrochemical polishing
Principle: Using electrochemical principles, a dense oxide film is formed on the surface of stainless steel gratings to improve surface smoothness and corrosion resistance.
Advantages: After treatment, the surface is bright and the finish is high, which can effectively improve the overall aesthetics and corrosion resistance of the stainless steel grate.
Pickling passivation
Principle: remove the oxide skin, rust and other impurities on the surface of stainless steel grate by pickling, and then carry out passivation treatment to form a protective film.
Advantages: The treated surface is matt gray white, and the corrosion resistance is enhanced.
Sand blasting
Principle: the use of high-speed injection of sand on the surface of the stainless steel plate impact, remove surface dirt and oxide layer, while increasing the surface roughness.
Advantages: Improve the binding force between the coating and the substrate, and enhance the adhesion of the coating.
Coating treatment
Principle: The surface of the stainless steel plate is coated with a layer of metal or non-metallic film to change its surface color, gloss and texture.
Advantages: Make the stainless steel gratings show different colors and luster, while improving their corrosion resistance and aesthetics. Common coating methods include chrome plating, nickel plating, etc.
2. coating protection technology
Choosing the right coating material
According to the use of the environment and use requirements, select the appropriate coating materials and coating process. For example, epoxy zinc-rich primer contains a large amount of zinc powder, which can provide cathodic protection and is suitable for use as an anti-rust primer; acrylic polyurethane topcoat has good weather resistance, chemical resistance and abrasion resistance, and is suitable for use as a topcoat.
Increase coating thickness
Coating thickness is one of the key factors affecting the corrosion resistance of coatings. During the coating construction process, the coating thickness should be controlled to ensure the quality of the coating. Increasing the coating thickness can extend the corrosion resistance cycle of the coating.
Quality Control of Coating Construction
Before painting, the surface of stainless steel gratings should be cleaned and pretreated to remove oil, rust and other impurities.
When spraying or brushing, it is necessary to ensure that there is enough drying time between each layer of paint to avoid problems such as cracking and falling off of the coating.
The ambient temperature and humidity of the paint also need to be controlled within a suitable range to ensure the quality of the paint film.
Regular inspection and maintenance
Regularly inspect the coating of stainless steel gratings, and timely discover and deal with problems such as coating damage and peeling.
For the damaged coating, repair and maintenance should be carried out in time to avoid further spread and aggravation of corrosion.
To sum up, strengthening the surface treatment and coating protection of stainless steel gratings needs to start from many aspects, including selecting the appropriate surface treatment technology, coating materials, controlling the quality of coating construction and regular inspection and maintenance. Through the comprehensive application of these measures, the corrosion resistance and service life of stainless steel grating can be effectively improved.
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