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Precision Micro Screw Surface Treatment & Rust Prevention Specification, Coating Selection & Storage Control Guide For Precision Electronic Fasteners
Precision Micro Screw Surface Treatment & Rust Prevention Specification, Coating Selection & Storage Control Guide For Precision Electronic Fasteners
Precision electronic equipment requires micro screws with precise dimension, stable torque, dust-free surface, uniform coating and stable conductivity. Many equipment faults are caused by coating peeling, surface oxidation and moisture rust. Reasonable coating matching and strict anti-rust storage control are core standards for precision fastener supporting.
1. Performance Comparison Of Mainstream Micro Screw Coatings
| Coating Process | Rust Resistance Grade | Conductivity | Wear Resistance | Surface Cleanliness | Core Application |
| Zinc Plating | Regular | Average high insulation | Weak, easy peeling | Ordinary, residual electroplating liquid | Ordinary consumer electronic non-precision parts |
| Nickel Plating | Excellent | Good stable conduction | High hardness & friction resistance | High delicate surface | Smart wearables, camera modules, precision structures |
| Stainless Steel Passivation | Superior | Original metal conduction | Extremely strong no peeling | Ultra-high no residue | Medical equipment, high-end sensors |
| Tin Plating | Medium | Excellent for welding | Medium soft texture | High clean welding spot | PCB fixing & conductive welding components |
| Gold Plating | Top-level anti-oxidation | Ultra-stable conduction | Good wear resistance | Ultra-high cleanliness | High-end precision instruments, aerospace electronic parts |
2. Scenario-based Coating Selection Standard
1. Ordinary digital non-core structures: Eco-friendly zinc plating for cost performance; 2. Smart wearables & vibration-resistant precision structures: Unified nickel plating for wear & oxidation resistance; 3. PCB welding & conductive components: Dedicated tin-plated micro screws for stable soldering; 4. Medical & high-precision instruments: Stainless passivation or gold plating for zero pollution & high stability.
3. Micro Screw Packaging & Anti-rust Storage Rules
1. Sealed packaging: Anti-static vacuum packaging mandatory to avoid dust and moisture adsorption; 2. Humidity control: Warehouse humidity maintained at 40%~60% to prevent condensation oxidation; 3. Batch isolation: Separate storage for different coatings and materials to avoid scratch and cross contamination; 4. Pre-delivery inspection: 100% visual inspection for high-end micro screws to eliminate oxidation, black spots and burrs.