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Precision CNC Machining China Lead Alloy Seal Custom Components for Industrial Applications
As a technical specialist in sealing technology, I recommend lead alloy seals as an ideal sealing solution for harsh working conditions. Lead alloy exhibits exceptional stability in highly corrosive environments due to its unique physical and chemical properties.
Research shows that lead-selenium alloys with appropriate selenium content can significantly refine the grain structure, resulting in more uniform grain boundary distribution and effectively reducing intergranular corrosion issues. This material forms a dense corrosion layer in sulfuric acid atmospheres, preventing further medium penetration.
Our lead alloy seals are manufactured using precision CNC machining technology, ensuring perfect surface flatness and dimensional accuracy for each sealing surface, providing reliable sealing protection for various industrial equipment.
Key Features
Excellent Corrosion Resistance: Lead alloy seals perform exceptionally well in corrosive media such as concentrated sulfuric acid and weak alkalis. Experiments indicate that lead-selenium alloys effectively inhibit hydrogen and oxygen evolution in sulfuric acid electrolytes, reducing gas generation and enhancing sealing system stability.
High Density and Sealing Performance: The high density characteristic of lead alloy enables it to form an effective physical barrier. When combined with elastic sealing materials (such as RTV silicone rubber), it creates multiple sealing structures at metal-plastic interfaces, completely preventing medium creep leakage.
Superior Machinability: Lead alloy materials are suitable for precision CNC machining, enabling the production of seals with precise dimensions and smooth surfaces. Our machining process ensures flatness errors within 0.01mm, meeting high-precision sealing requirements.
Temperature Adaptability: Maintains stable performance within a temperature range of -50°C to 200°C. Specially formulated lead alloy seals can even operate in higher temperature environments, suitable for various industrial temperature conditions.
Custom Design Flexibility: Mechanical properties and corrosion resistance can be optimized by adjusting alloy composition (such as lead-selenium-tin ternary alloys). Customized production is supported according to customer requirements for dimensions, shapes, and performance indicators.
Technical Specifications
Parameter
Technical Specification
Test Standard
Material Composition
Lead-based alloy (optional Se, Sn, etc.)
ASTM B102
Density
11.2-11.4 g/cm³
GB/T 3850
Operating Temperature Range
-50°C to +200°C
MIL-STD-810
Tensile Strength
≥45 MPa
ASTM E8
Corrosion Resistance
<0.1mm corrosion depth after 60 days immersion in 1.275g/cm³ sulfuric acid
Lead-Acid Battery Systems: Used for battery terminal sealing to prevent electrolyte leakage. Lead alloy combines with EPDM rubber gaskets and RTV silicone rubber to form composite sealing structures resistant to sulfuric acid corrosion and temperature variations.
Chemical Valve Sealing: Serves as valve stem seals or valve seat sealing surfaces, where corrosion resistance ensures long-term sealing effectiveness in chemical media. Particularly suitable for conveying systems handling strong corrosive media like sulfuric acid and hydrochloric acid.
Pipeline Connection Sealing: Provides metal-to-metal sealing solutions at pipeline joints in petroleum and chemical industries, offering better resistance to high temperatures and pressures compared to traditional rubber seals.
Special Equipment Sealing: Applicable as sealing elements for downhole tools like packers, maintaining sealing integrity in high-temperature, high-pressure downhole environments.
Customization Services
We provide comprehensive customization services, designing and manufacturing specialized lead alloy seals according to customers' specific working condition requirements:
Size Customization: Supports non-standard sizes and special-shaped structural seals, with maximum processing diameter up to 500mm
Material Customization: Optimizes specific performance indicators of seals by adjusting alloy ratios (such as lead-selenium-tin ternary alloys)
Composite Structure Design: Combines with materials like rubber O-rings and PTFE coatings to form multiple composite sealing systems
Rapid Prototyping: Provides samples within 7 working days after receiving requirements, accelerating customer product development cycles
Support and Services
Technical Consultation: Offers sealing system design solutions, assisting customers in selecting the most appropriate sealing structures and materials
Quality Assurance: Implements full-process quality control from raw material inspection to finished product delivery, ensuring each product meets technical requirements
After-sales Support: Provides guidance on seal installation and usage maintenance recommendations to extend sealing system service life
Emergency Production: Offers expedited production services for urgent needs, minimizing delivery times
