Innovative and Professional Chemical Cleaning Line for High-Performance Metal Surface Polishing

Equipment Description:

I. Principles of Chemical Polishing
‌1. Corrosion Selectivity‌
Chemical polishing achieves smoothing by preferentially dissolving raised areas of a metal surface with a chemical solution. Its key principle is that the dissolution rate of microscopically high (more active) surface ridges is significantly higher than that of concave areas, ultimately resulting in a smooth surface.

The process consists of two stages: Macro-smoothing: removing roughness (micrometer-level) by forming a viscous liquid film on the surface to achieve differential dissolution; Micro-glossing: removing crystallographic defects (submicrometer-level), relying on a balance between the formation and dissolution of a solid oxide film.
‌2. Reaction Mechanism‌
Acidic components (such as phosphoric acid and nitric acid) in the polishing solution react with the metal to form an easily peelable passivation film or dissolution products. Mechanical flow removes the reactants, preventing localized accumulation.
Additives (such as corrosion inhibitors and oxidants) regulate the reaction rate to prevent excessive corrosion or pitting defects.

II. Typical Applications and Process Parameters

III. Maintenance and Optimization

‌1. Bath Management‌
Regularly check the acid concentration (e.g., nitric acid ≤ 15%), replenish the oxidizer, and remove any deposits (every 1-3 weeks).
Avoid the accumulation of metal ions (e.g., Fe₃⁺) to prevent the polishing fluid from becoming ineffective.
‌2. Equipment Maintenance‌
Inspect seals (NBR/fluororubber) for aging and replace them to prevent leakage.
Acid clean the titanium alloy heating tubes quarterly to remove the passivation layer and maintain heat transfer efficiency.

Main structures and components:

I. Core Structure
‌1. Tank Body
‌Material: Typically made of corrosion-resistant materials such as polypropylene (PP), polyvinyl chloride (PVC), or titanium alloy. Some tanks feature a double-layer structure (inner lining of fluoroplastic or rubber, outer layer of steel/concrete) to enhance mechanical strength and chemical resistance.
‌Design Type: Depending on the workpiece shape and process requirements, polishing tanks can be divided into sleeve-type polishing tanks (for localized polishing), tube-type polishing tanks (for hollow workpieces), and oscillating polishing tanks (with an oscillating head).
‌2. Temperature Control System
‌Heating Method: Tank temperature is controlled via steam, electric heating, or an internal titanium alloy coil. The typical operating temperature range is 80-100°C.
‌Circulation and Agitation: Equipped with a corrosion-resistant circulation pump or mechanical agitator to ensure uniform tank temperature and prevent local overheating. 3. Electrode System

Layout Design: The anode and cathode rods are fixed to either side of the tank or on a removable frame, allowing for adjustable spacing to accommodate varying workpiece polishing requirements.

Electrode Material: The cathode is typically made of titanium or 316L stainless steel, while the anode is typically the workpiece itself (e.g., aluminum alloy or stainless steel).

Insulation Protection: The electrode rods are isolated from the tank body by a polytetrafluoroethylene (PTFE) insulation sleeve to prevent electrical leakage.

II. Auxiliary Systems

1. Polishing Fluid Circulation

Filter: Optional PP filter bags or activated carbon adsorption systems are available to remove particulate matter and organic matter generated during the polishing process.

Sealing Design: The tank cover is equipped with a splash seal and a pressure relief valve to prevent acid mist from escaping and excessive tank pressure.

2. Safety and Control System

Ventilation and Exhaust: An acid-resistant exhaust system is connected to quickly exhaust corrosive gases, reducing environmental hazards.

Parameter Monitoring: Integrated temperature sensors and liquid level controllers are available. Some high-end equipment supports PLC-based automatic control of process parameters (such as temperature and time).

III. Applications and Compatibility
‌Applicable Scenarios‌: Supports processes such as triple-acid polishing of aluminum alloys and chemical polishing of stainless steel. It is particularly suitable for localized treatment of complex workpieces (such as the inner surfaces of pipes and kettle cavities).
‌Maintenance Tips: Regularly clean sediment from the tank bottom (every 1-3 weeks), inspect seals for aging and replace them (made of NBR or fluororubber).

Features:

1.High cost performance: Based on the customer's product positioning and development strategy, and with economic affordability as the foundation, we achieve the best cost performance.
2.The advanced and meticulous design concept of the equipment, along with the highly automated industrial equipment, showcases the image of a modern and advanced enterprise.
3. It has high adaptability, meeting the current production requirements and reserving room for development, taking into account the needs of increased production and improved quality in the future.
4.Quality compliance strictly adheres to the ISO900 quality management system, with every minute detail of the entire equipment installation being strictly controlled.

Domestic large-scale coating equipment, intelligent equipment, and environmental protection equipment production enterprises-Zhejiang Huier Coating Environmental Protection Equipment Co., Ltd has 37 years of experience industry team in the powder coating equipment,intelligent equipment and environmental protection equipment.It is the national high and new tech enterprise,Specialized, refined, and innovative small and medium-sized enterprises， scientific and technological SMES 27years specialized R&D, design, manufacture, installation, commissioning ,maintenance of varies coating equipment, automatic equipment, intelligent control system, waste water,waste gas environmental protection equipment and treatment engineering.The company is located in Wukang Street, Deqing County, covers an area of 30,000 square meters, workshop of more than 20,000 square meters, more than 200 employees. The company has passed ISO9001 international system certification, ISO14001 environmental management system certification and ISO45001:2018 Occupational health and safety management system certification, and obtained more than 40 national patents.

The company actively and constantly introduce excellent talents, focus on the development of coating equipment and environmental protection equipment of new technology, new process and new products every year.It is the mission of all staff to continuously develop and grow, meet the needs of customers and create value for customers.

The products are used in all kinds of metal surface, plastic, aerospace, auto parts, mechanical equipment, furniture and other surface treatment.It will meet the customer needs, because it adopts automatic production to anti-corrosion and powder coating the user's products,coating solid bright.

In aerospace, household appliances, light industry, furniture, machine tools, construction, motorcycles, automobiles, communications, aluminum, electric power, agricultural machinery and transportation and other industries by the user's praise. The company continue to innovate, research and development of new products, design and manufacture safety, energy saving, environmental protection, intelligent features of fire-proof safe, powder coating environmental protection equipment and intelligent equipment engineering projects.

The company not only meet the needs of domestic customers, but also in Southeast Asia, the Middle East, Europe, North America, South America and other 27 countries occupied the market has won the favor of customers! The company always dedicated to our customers with the overall intelligent coating environmental protection system solutions and system services.