Technology

Anodic oxidation of other metals In addition to aluminum and aluminum alloys, other metals such as magnesium, copper, titanium, and zinc can also be surface-treated using anodizing technology to produce oxide films with specific properties to meet different usage requirements. Although not as widely used as aluminum anodizing, anodizing technology for these metals plays an important role in their respectiveMore

Anodic oxidation of aluminum and aluminum alloys Anodizing of aluminum and aluminum alloys is a surface treatment technology developed based on the characteristics of aluminum material. It generates a dense aluminum oxide film on its surface through electrolysis, which significantly improves the corrosion resistance, wear resistance and decorative properties of aluminum and aluminum alloys. Aluminum is an active metal thatMore

Ordinary anodizing technology Conventional anodizing technology is a surface treatment process that generates an oxide film on the metal surface through electrolysis. Its core principle is to use the metal workpiece as the anode, place it in a specific electrolyte, and under the action of an external direct current, cause an oxidation reaction on the metal surface to form anMore

Chemical oxidation of aluminum and aluminum alloys Chemical oxidation of aluminum and aluminum alloys involves immersing them in a chemical solution, where a chemical reaction creates an oxide film on the surface. Compared to anodizing, this technique requires no external power source, is simple to operate, and is relatively low-cost. The resulting oxide film is typically 0.5-4 microns thick, withMore

Chemical oxidation of steel Chemical oxidation of steel involves immersing a steel workpiece in a specific chemical solution. Through a chemical reaction, a layer of oxide film (commonly known as “bluing” or “blackening”) forms on the surface of the workpiece, primarily composed of iron oxide. This film typically appears bluish-black or black, with a thickness of 0.5-2 microns. Although thin,More

Metal surface chemical oxidation technology Chemical oxidation of metal surfaces is a treatment process that improves the surface properties of metals by immersing the metal workpiece in a specific chemical solution and using a chemical reaction to form a dense oxide film on its surface. Unlike electrochemical oxidation, this technology does not require an external power source and relies solelyMore

Metal surface conversion coating technology Metal surface conversion coating technology involves chemically or electrochemically reacting the metal surface with a specific treatment solution, producing a thin compound film (conversion film) that bonds securely to the substrate. Conversion coatings are typically composed of metal oxides, hydroxides, phosphates, chromates, and silicates. They enhance the corrosion resistance, wear resistance, and decorative properties ofMore

Metal hot-dip coating technology Hot-dip metal coating is a surface treatment method that involves immersing the workpiece in molten coating metal to form a firmly bonded coating. The basic principle is to use high temperatures to induce diffusion and chemical reaction between the coating metal and the base metal, forming an alloy layer and achieving a metallurgical bond between theMore

Metal chemical plating technology Electroless metal plating is a surface treatment technology that automatically deposits a metal or alloy coating on metal or non-metal surfaces through a chemical reaction without the need for an external power source. Its core principle is to use a reducing agent to reduce metal ions in the plating solution to metal atoms, which are thenMore

Metal brush plating technology Metal brush plating is a surface repair and strengthening technology that eliminates the need for large plating tanks. Instead, a specialized brush plating pen contacts and moves relative to the workpiece surface, achieving localized electroplating. Its operating principle is similar to that of traditional electroplating, both based on electrolysis, but with more flexible equipment and operation.More

Development trend of electroplating As an important part of the manufacturing industry, the development trend of the electroplating industry is closely related to environmental protection requirements, technological progress and market demand. At present, with the continuous enhancement of global environmental awareness, countries have increasingly stringent environmental regulations on the electroplating industry. Toxic and harmful chemicals used in traditional electroplating processesMore

Single metal and alloy plating Monometallic electroplating is the most basic and commonly used type of electroplating technology. It deposits a single metal coating on a workpiece through electrolysis to meet specific performance requirements. Common monometallic coatings include zinc, nickel, chromium, copper, gold, and silver, each with its own unique properties and applications. Zinc coatings offer excellent corrosion resistance andMore

Principles and processes of electroplating The principle of electroplating is based on electrolysis. Its core principle is that, under the influence of direct current, metal ions in the electrolyte undergo directional migration and are reduced and deposited on the surface of the cathode (the workpiece being plated). Specifically, during the electroplating process, the workpiece being plated serves as the cathode,More

The concept and classification of electroplating Electroplating is a surface treatment process in which a direct current is applied to an electrolyte containing the desired metal ions, with the workpiece serving as the cathode. This reduces and deposits the metal ions on the cathode surface through the action of an external DC current, forming a metal or alloy coating withMore

Metal electroplating technology Metal electroplating is a surface treatment technique that uses electrolysis to deposit a metal or alloy coating on a metal surface. It modifies the physical and chemical properties of the metal surface to meet different application requirements. In modern industry, metal electroplating is widely used, from precision electronic components to large mechanical parts. For example, in theMore

Metal surface coating technology Metal surface coating technology involves depositing one or more layers of metallic or non-metallic coatings onto metal surfaces through physical, chemical, or electrochemical methods to improve surface properties. Its primary purpose is to enhance the metal’s corrosion resistance, wear resistance, decorative properties, or to impart specific functionalities (such as electrical conductivity, lubricity, and high-temperature resistance). AMore

Metal surface deformation strengthening technology Metal surface deformation strengthening technology is a process that applies mechanical force to the metal surface to cause it to undergo plastic deformation, thereby changing the surface structure and stress state to achieve the goal of improving surface hardness, wear resistance and fatigue strength. Its core principle is to use plastic deformation to refine theMore

Metal chemical heat treatment technology Chemical heat treatment of metals involves placing a metal workpiece in a specific chemical medium and, at a specific temperature, allowing certain elements in the medium (such as carbon, nitrogen, boron, and chromium) to penetrate the workpiece’s surface, thereby changing the surface’s chemical composition and microstructure, ultimately improving surface properties. Unlike processes such as surfaceMore

Metal electrolyte heating quenching Electrolytic quenching is a process that uses an electrolyte as both a heating and cooling medium to heat the metal surface through electrolysis, followed by cooling by the electrolyte itself to achieve surface hardening. The process operates by placing a metal workpiece as the anode and an electrolytic cell as the cathode, with an electrolyte (typicallyMore

Metal contact resistance heating quenching Metal contact resistance hardening is a heat treatment process that utilizes the resistance heat generated when an electric current passes through the contact point between a metal workpiece and an electrode to locally heat the workpiece surface, followed by rapid cooling to achieve hardening. Its operating principle is based on Joule’s law. When current passesMore

Metal flame quenching Metal flame hardening is a heat treatment process that uses a gas flame to rapidly heat the metal surface and then quickly cool it to achieve surface hardening. The core principle is to heat the metal surface to the austenitizing temperature through a high-temperature flame, and then quickly cool it by spraying water or mist, so thatMore

Surface heat treatment technology Surface heat treatment technology refers to a heat treatment process that only heats, keeps warm, and cools the surface of metal materials to change their surface structure and obtain the required mechanical properties. Different from overall heat treatment, surface heat treatment only changes the properties of the metal surface, while the core still maintains its originalMore

Metal surface modification technology Metal surface modification technology refers to a process that changes the chemical composition, organizational structure or physical properties of the metal material surface through physical, chemical or mechanical means, thereby giving the metal surface new functional properties to meet the requirements of specific use environments. In industrial production, the failure of metal materials often begins onMore

Metal surface composite pretreatment Metal surface composite pretreatment is a technology that organically combines two or more single pretreatment processes to form a synergistic effect to achieve better treatment effects. A single pretreatment process often has certain limitations. For example, mechanical cleaning is difficult to completely remove oil stains, and chemical degreasing is not effective for complex surface treatment. TheMore

New Technology for Metal Surface Pretreatment New technologies for metal surface pretreatment are developed based on traditional processes and combined with modern science and technology to create efficient, environmentally friendly, and precise treatment technologies. These technologies aim to overcome the severe pollution, low efficiency, and limited treatment effects inherent in traditional processes, while meeting the increasingly stringent demands of modernMore

Metal surface activation Metal surface activation is an important pretreatment process in metal surface treatment. Its purpose is to remove the passivation film, oxide layer, and other inert substances on the metal surface, increase the chemical activity of the surface, create favorable conditions for subsequent electroplating, chemical plating, painting, and other processes, and enhance the bonding strength between the platingMore

Rust removal on metal surfaces Rust removal of metal surfaces is an essential step in metal protection and processing. Its core task is to remove rust products from the metal surface, restoring the metal’s original properties and paving the way for subsequent processing. Metals are highly susceptible to oxidation in humid, oxygen-rich environments, forming rust (primarily composed of iron oxide).More

Degreasing of metal surfaces Metal surface degreasing is one of the key processes in the metal surface treatment process. Its main function is to remove grease, oil stains and other organic pollutants on the metal surface, providing a clean surface for subsequent processes such as rust removal, phosphating, painting, and electroplating, ensuring that subsequent treatments can adhere evenly and firmlyMore

Metal surface leveling Metal surface leveling is a crucial step in the metalworking process. Its purpose is to eliminate surface defects such as irregularities, scratches, and burrs, achieving a certain level of flatness and finish to meet the requirements of subsequent processing or use. During processes like rolling, forging, and cutting, various surface defects often develop due to factors suchMore

Metal surface pretreatment process ** The metal surface pretreatment process is a crucial step in the production and processing of metal products. Its quality directly affects the effectiveness of subsequent processing steps as well as the ultimate performance and service life of the product. Before metal products are put into use, their surfaces often have defects and impurities such asMore

Metal induction hardening Induction hardening of metals utilizes the principle of electromagnetic induction to generate eddy currents on the surface of a metal workpiece, rapidly heating the surface to the austenitizing temperature. This process is then immediately cooled by spraying water to achieve surface hardening. The core of this technology is to generate an alternating magnetic field using an inductionMore