Metal surface treatment is a common process used to improve the performance, appearance, and durability of metal surfaces. These processing methods can be performed at different stages of metal product manufacturing, including raw material processing, forming processing, and final processing stages. Metal surface treatment uses modern physics, chemistry, metallurgy, heat treatment and other disciplines to change the condition and properties of the surface of parts, so that it can be optimally combined with the material to achieve the expected requirements. Ruiyi provides 35+ surface treatment services, including but not limited to physical surface treatment, chemical surface treatment, electrochemical surface treatment, and modern surface treatment.

Ⅰ. Physical surface treatment: sandblasting, grinding, polishing, drawing, spraying, etc.

1. Sandblasting, also known as sanding, sandblasting, etc. It sprays sand or other granular materials at high speed and impacts them onto the surface of the object being processed to achieve the purpose of cleaning, removing dirt, and improving surface quality. Due to the impact and cutting effect of abrasives on the surface of the workpiece, the surface of the workpiece obtains a certain degree of cleanliness and different roughness, which improves the mechanical properties of the surface of the workpiece, thus improving the fatigue resistance of the workpiece and increasing its resistance to coating. The adhesion between them extends the durability of the paint film and is also beneficial to the leveling and decoration of the paint.

Grinding is often used for cast iron parts, and brass and copper grinding tools are mostly used. The grinding tool should have sufficient stiffness and its working surface should have high geometric accuracy. The grinding tool is also subject to cutting and wear during the grinding process. If operated properly, its accuracy can also be improved, so that the processing accuracy of the workpiece can be higher than the original accuracy of the grinding tool.

2. Polishing refers to a processing method that uses mechanical, chemical or electrochemical effects to reduce the surface roughness of the workpiece to obtain a bright and smooth surface. Polishing cannot improve the dimensional accuracy or geometric shape accuracy of the workpiece, but is intended to obtain a smooth surface or mirror gloss. Sometimes it is also used to eliminate gloss (matting). Common ones include mechanical polishing, chemical polishing, and electrolytic polishing.

3. The wire drawing process aims to form lines on the surface of the workpiece through grinding products to achieve a decorative effect. This treatment method not only reflects the texture of the metal material, but also makes the metal surface obtain a non-mirror-like metallic luster, which has a very strong decorative effect, similar to silk satin. Including a variety of different texture effects, such as straight grain, random grain, thread, corrugation and spiral grain, etc.

4. Metal surface spraying treatment is an important means of metal anti-corrosion maintenance. Its purpose is to protect the metal from corrosion, improve the aesthetics of the product, and enhance certain special properties of the product, such as conductivity, wear resistance, Thermal insulation, insulation, sealing, lubricity and acid and alkali corrosion resistance, etc.

Ⅱ. Chemical surface treatment: blackening, phosphating, pickling, chemical plating of various metals and alloys, TD treatment, QPQ treatment, chemical oxidation, etc.

1. Blackening is to place steel parts in a chemical solution and heat them to an appropriate temperature to oxidize the surface to form a smooth and dense oxide film, thereby improving the rust prevention ability of the steel parts.

2. During phosphating treatment, the metal is immersed in the prepared phosphating treatment solution. After chemical and electrochemical reactions, a layer of phosphate chemical conversion film is formed on the metal surface, also called phosphating film. The purpose of phosphating is to protect the metal from corrosion, and the phosphated metal surface can make the paint have stronger adhesion when painting and better play an anti-corrosion role;

3. Pickling and passivation treatment: refers to immersing the metal parts in the pickling and passivating solution until the surface of the workpiece becomes uniform and silvery white to complete the process. It is not only simple to operate, but also low in cost. The pickling and passivating solution can be used repeatedly. recycle.

4. The principle of electroless plating is to use the redox reaction at high temperature to heat the metal salt solution to a certain temperature, then add a reducing agent to reduce the metal cations into metal atoms, and finally deposit a metal coating on the surface of the substrate. Electroless plating has a wide range of applications, and the gold plating layer is uniform and decorative. In terms of protective performance, it can improve the corrosion resistance and service life of the product.

Ⅲ.Electrochemical surface treatment: anodizing, electrochemical polishing, electroplating, etc.

1. Anodizing uses electrochemical methods to control the formation of oxide layers to prevent further oxidation of aluminum materials and at the same time increase the mechanical properties of its surface. Another purpose is to produce various colors through different chemical reactions to enhance the appearance and is widely used in aircraft skins. , military weapons, photocopier paper rollers, building aluminum curtains, aluminum doors and windows, etc. Anodizing aluminum alloy can improve corrosion resistance, increase oxidation color and improve adhesion. However, it cannot increase the strength of aluminum. In addition, the anodized layer is non-conductive;

2. Electrolytic polishing treatment: Technology refers to electrolytic polishing, also known as electrochemical polishing, which refers to the process of placing the workpiece in an electrified solution to improve the flatness of the surface of the metal workpiece and make it shiny. Almost all metals can be electropolished, such as stainless steel, carbon steel, titanium, aluminum alloy, copper alloy, nickel alloy, etc., but stainless steel is the most widely used. Through the combined action of positive and negative currents and electrolytic polishing liquid, the micro-geometry of the metal surface is improved and the roughness of the metal surface is reduced. In order to achieve the purpose of bright and smooth surface of the workpiece.

3. Electroplating is the deposition of a layer of metal on the metal surface through electrochemical reaction. The principle of electroplating is to put the workpiece into a metal ion solution as a cathode. At this time, the cations in the solution are electrolyzed and deposited on the surface of the workpiece to form a metal coating.

These surface treatment methods can be used alone or in combination to meet the specific requirements and application scenarios of different metal products. Choosing the right surface treatment method can improve the quality, performance and longevity of your metal products.