What is the difference between a silane treatment agent and an oxidizing agent? If you don't know, you'll be at a big loss!
Yesterday, the editor discussed with netizens on the forum about the technical issues of exchanging metal surface pretreatment. The main topic of discussion is the oxidation treatment process. In recent years, with the stricter environmental restrictions in my country, the traditional phosphating process has been gradually withdrawn from the market, and replaced by two new processes of ceramicization and silane treatment. How to choose between the two potions of pottery agent and silane treatment agent? What's the difference between them? In addition, many netizens were confused and puzzled. So, today I will detail the differences between these two crafts.
As mentioned above, we have learned that both the ceramic agent and the silane treatment agent are a new type of surface oxidation treatment medium newly developed to replace phosphating. The film-forming of the ceramic agent is mainly a composite of zirconium dioxide or titanium dioxide, so it is also called a ceramic film. , divided into alkaline silicon treatment agent and acid silicon treatment agent.
Ceramicizing agent is a simple surface chemical reaction, providing -OH group for the surface after film formation, chemical reaction with paint group, improving adhesion and salt spray performance, generally suitable for products with low quality requirements, such as indoor home appliances , power distribution devices, etc.
Acidic silane treatment agent is an upgrade of ceramic agent. It can adsorb silicon chemistry on the basis of ceramic film to achieve the effect of improving adhesion and salt spray performance. It is generally suitable for products with high quality requirements such as automobiles, auto parts, and home appliances. . Silane treatment agent is similar to alkaline anti-rust system, and there are certain risks during its use. Generally, it is suitable for products with low quality requirements and simple process.
Silane treatment agent is an environmentally friendly metal surface pretreatment agent without unattended salt, which can replace iron series phosphating, and some zinc series phosphating liquid can replace antirust oil and short-term antirust paint. The principle is that the steel forms a silicon film under the action of the converter, and the film layer has a high degree of straightness and compactness. The film layers chemically intersect and combine with the resin layers to improve the adhesion between the film layer and the coating. The chemical bonding of the film layer (away from the physical components of the phosphate film) adsorption improves the bonding force between the film layer and the substrate, and the two-way effect greatly enhances the adhesion of the coating and the substrate, matching various types of coatings.
Product features of silane treatment agent: no phosphate and heavy metals, economical to use, simple to operate, no need for heating, spraying or immersion treatment, no need to replace part of the groove during opening every day, large unit treatment area, no special requirements for steel, And a series of chromaticity changes are produced, and the workpiece produces a colorless and transparent liquid. At the same stage, metal materials such as steel, zinc materials, hot-dip galvanized sheets, electro-galvanized sheets, and aluminum can be processed at the same time.