Technology

Properties of hard anodized film The most notable properties of hard anodized films are their exceptional hardness and wear resistance, making them a preferred option for aluminum alloy surface hardening and widely used in components requiring resistance to mechanical wear. The hardness of hard anodized films typically ranges from HV300-500 , and under certain process conditions can reach HV600 orMore

Power waveforms for hard anodizing and pulse anodizing During hard anodizing, the choice of power waveform has a crucial impact on the quality of the oxide film. Different waveforms alter the electric field distribution and current density of the electrolytic reaction, affecting the film’s growth rate, density, and hardness. Commonly used power waveforms include DC, AC, and pulsed waveforms. DCMore

Wire flame spraying Wire flame spraying is one of the earliest and most mature processes in thermal spraying. It uses metal or alloy wire as the spray material. A flame melts the wire, and compressed air atomizes the molten metal into fine particles, which are then sprayed onto the substrate at high speed to form a coating. This method featuresMore

Principle of microplasma oxidation The principle of microplasma oxidation is a complex process involving electrochemistry, plasma physics, and materials chemistry. Its core is that under the action of a high-voltage electric field, plasma discharge is generated at the interface between the metal surface and the electrolyte, triggering a series of physical and chemical reactions that ultimately form a ceramic oxideMore

Microplasma oxidation technology Microplasma oxidation, also known as micro-arc oxidation, is an advanced surface treatment technology that electrochemically grows ceramic films in situ on the surfaces of light metals such as aluminum, magnesium, titanium, and their alloys. This technology overcomes the performance limitations of traditional anodic oxidation. By inducing plasma discharge under a high-voltage electric field, complex physical and chemicalMore

Applications of Microplasma Oxidation Microplasma oxidation (MPO), also known as micro-arc oxidation, is a surface treatment technology that uses plasma discharge to trigger a chemical reaction on the surfaces of light metals such as aluminum, magnesium, and titanium, forming a ceramic oxide film. Its application has gradually expanded from aerospace to various fields, including automotive, medical, and electronics. Compared withMore

Special spraying technology Specialty spraying technology is a general term for spraying processes with specialized capabilities or suitability for extreme environments, compared to traditional flame spraying and arc spraying. These technologies primarily include supersonic flame spraying, cold spraying, and laser spraying, playing an irreplaceable role in high-end sectors such as aerospace, new energy, and precision manufacturing. These technologies transcend theMore

Anodic oxidation treatment of daily industrial products Anodizing of daily industrial products is a key process for improving the performance and appearance of aluminum and aluminum alloy products. It is widely used in kitchenware, furniture, electronic product casings and other fields. This process uses aluminum products as anodes, places them in electrolytes such as sulfuric acid and oxalic acid, appliesMore

Thermal spraying process and quality control The thermal spraying process is a complex, multi-step collaborative process encompassing four core stages: substrate pretreatment, spray material preparation, spray application, and post-processing. The quality of each stage directly impacts the performance of the final coating. Substrate pretreatment is fundamental to the process, aiming to remove surface oil, rust, and scale, increase surface roughness,More

Thermal spray coating defects and their causes One of the most common defects of thermal spray coatings is insufficient bonding strength between the coating and the substrate, manifesting as localized or large-scale flaking of the coating, which seriously impacts its protective function and service life. The main causes of this defect include improper substrate surface pretreatment, such as the presenceMore

Performance and Design of Thermal Spray Coatings The performance of thermal spray coatings is the core indicator of their quality, mainly including mechanical properties, protective properties, and functional properties. These properties are interrelated and have different focuses, and together they determine the coating’s effectiveness. Among mechanical properties, bond strength is a key indicator, referring to the ability of the coatingMore

Design, selection, function and application of thermal spray coatings The design of thermal spray coatings is a systematic process. Starting with the workpiece’s operating conditions, the coating’s performance specifications must be clearly defined. Then, a layered design is implemented, taking into account the substrate’s characteristics to ensure an integrated, integrated coating. This operating condition analysis includes detailed parameters such asMore

Functions and applications of thermal spray coatings One of the core functions of thermal spray coatings is to provide excellent wear resistance, significantly extending the service life of machinery under abrasive conditions. They are widely used on vulnerable parts in industries such as mining, metallurgy, and building materials. Wear is one of the main causes of component failure in industrialMore

Selection of thermal spraying materials and processes The selection of thermal spray materials and processes is crucial to ensuring that coating performance meets application requirements. This requires comprehensive consideration of multiple factors, including the workpiece’s operating environment, performance requirements, substrate characteristics, and economic viability. The primary consideration is the operating environment, which includes factors such as temperature, corrosive media, andMore

Characteristics of thermal spray materials Thermal spray materials are distinguished by their diverse compositional diversity, allowing for the design and adjustment of their composition to suit specific application requirements, resulting in coatings with a wide range of superior properties. Whether using a single metal, alloy, ceramic, or metal-ceramic composite, thermal spray materials can be used to create coatings. For example,More

Classification of thermal spray materials Thermal spray materials can be divided into four categories based on their physical form: powder, wire, rod, and paste. Different forms of material are suitable for different thermal spray processes, each with its own characteristics and application range. Powder is the most widely used material form in thermal spraying. Its particle size typically ranges fromMore

Thermal Spray Safety and Protection The thermal spraying process involves numerous hazardous factors, including high temperatures, high pressures, high-velocity particles, and hazardous gases. Therefore, safety and protective measures are essential components of thermal spraying operations. During thermal spraying, heat source temperatures can reach thousands of degrees Celsius. For example, the arc temperature in plasma spraying can exceed 10,000°C, and theMore

Application examples of anodic oxide films on aluminum and aluminum alloys Aluminum and aluminum alloy anodized films, due to their excellent corrosion resistance and hardness, are widely used in key components in the aerospace industry. For example, on aircraft aluminum alloy skins and wing leading edges, sulfuric acid anodizing creates an oxide film with a thickness of 15-25μm. This denseMore

Application examples of chemical oxidation film on aluminum and aluminum alloys Chemical oxidation coatings on aluminum and aluminum alloys are widely used in architectural decoration due to their ease of application and low cost. In the surface treatment of aluminum alloy doors, windows, curtain walls, and other building components, chemical oxidation coatings provide basic corrosion protection while also laying aMore

Phosphating And Phosphating Film Phosphating is a surface treatment technology that forms a non-metallic, non-conductive phosphate conversion film on metal surfaces through a chemical reaction. Its core principle is to utilize phosphoric acid or a phosphate solution to react with the metal substrate to produce a strongly adherent phosphate film. This film is primarily composed of metallic phosphate crystals andMore

Metal spraying technology Metal spraying technology involves applying metal or alloy materials to substrate surfaces through a specific process, creating a coating with specialized properties. It plays a vital role in aerospace, machinery manufacturing, petrochemicals, and other fields. The core of this technology is to use a heat source to heat the spray material to a molten or semi-molten state.More

Metal air spraying Metal air spraying is a coating technique that uses compressed air to atomize and spray paint onto metal surfaces. It is widely used in industrial corrosion protection, decoration, and other fields. The core principle is that the high-pressure airflow generated by an air compressor creates a negative pressure at the spray gun nozzle, drawing the paint fromMore

Definition, principle and characteristics of cold spray Cold spraying is a solid-state coating preparation technology. Its core feature is the use of high-speed airflow to accelerate metal powder particles (typically 1-50μm) into the substrate surface at speeds of 300-1200m/s. Through intense plastic deformation, solid-state bonding is achieved without melting the powder during the entire process. This technology was first proposedMore

Cold spray technology As an advanced solid-state coating preparation and additive manufacturing technology, cold spray technology holds a key position in the field of material surface engineering due to its unique low-temperature deposition characteristics. Unlike traditional thermal spray technology, which relies on high-temperature melting of materials, cold spray technology uses a high-speed airflow (typically 300-1200m/s) to propel metal or alloyMore

Application of cold spray technology Cold spray technology, thanks to its unique low-temperature deposition characteristics and excellent coating performance, has found widespread and critical applications in the aerospace sector. It demonstrates irreplaceable advantages in the manufacture and repair of aircraft engine components. Critical components such as engine blades and turbine disks operate in high-temperature, high-pressure, and highly corrosive environments, makingMore

Cold spray equipment system and process parameters The cold spray equipment system is the core vehicle for cold spray technology. It consists of four main components: the air source system, powder delivery system, spray gun system, and control system. These components work together to ensure high-quality coating deposition. The air source system provides high-pressure gas for the cold spray process,More

Metal coating technology Metal coating technology lies at the intersection of materials science and engineering. By continuously incorporating advances in automation control, new materials, and environmental science, it has developed a diverse technical framework. Based on the underlying principles, it can be categorized into four main types: solvent-based coating, water-based coating, powder coating, and electrophoretic coating. Each technology offers uniqueMore

Metal coating process The metal coating process is a systematic undertaking, encompassing a complete process from substrate pretreatment to final coating curing. Its core goal is to impart superior protective properties and decorative effects to metal surfaces through scientific process design. The typical process includes five key steps: surface pretreatment, primer application, midcoat and topcoat application, drying and curing, andMore

Metal thermal spraying materials Metal thermal spray materials are a core component of metal thermal spraying technology. Their performance directly determines the quality and effectiveness of the coating, making them irreplaceable in the field of industrial surface treatment. These materials typically exist in the form of powders, wires, and rods. Depending on their chemical composition and function, they can beMore