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Powder coating creates a durable, decorative, and corrosion-resistant surface on metal parts.
Powder coating is a dry finishing process that uses electrostatically charged powder to coat metal parts. After curing at high temperature, the powder melts and forms a high-strength, uniform, and protective coating. It is widely used in automotive, aerospace, industrial machinery, consumer electronics, and outdoor equipment.
Suitable for most industrial and consumer-grade parts, available in various RAL colors.
Textured Powder CoatingCreates unique patterns and hides machining marks.
High-Gloss / Matte FinishProvides flexible visual styles depending on product needs.
Anti-Corrosion Powder CoatingIdeal for outdoor or harsh environments.
Utilizes rotating cutting tools for high-precision machining of flat surfaces, curves, and complex parts, ideal for mold making, aerospace, and automotive industries.
Uses rotating workpieces and cutting tools for efficient machining of cylindrical components, widely applied in shafts, discs, and precision parts manufacturing.
Enables multi-angle precision cutting, reducing setups and machining complex surfaces, perfect for high-end aerospace, medical devices, and precision mold manufacturing.
Powder flows and levels during curing for a consistent texture.
Protects metal surfaces from moisture, chemicals, and oxidation.
Ideal for parts requiring durability.
Contains no solvents or VOC emissions.
Available in RAL colors, matte, gloss, metallic, textured finishes.
Occurs when powder is sprayed too thick or too thin due to unstable gun settings, inconsistent spray distance, or poor grounding. This results in uneven texture, patchy appearance, or areas with insufficient protection.
This defect appears as a bumpy surface similar to an orange peel. It is commonly caused by incorrect curing temperature, excessive powder thickness, moisture contamination, or low-quality powder.
Tiny holes form when trapped air, oils, or solvent residues escape during curing. They compromise the coating's protective performance and surface aesthetics.
Foreign particles such as dust, fibers, or uncleaned machining residues adhere to the surface before spraying, resulting in bumps and defects on the final coating.
Powder naturally accumulates around sharp edges and corners due to electrostatic attraction, causing thicker coating and potential dimension deviations.
This occurs when powder batches differ, recycled powder mixes poorly, or spraying parameters fluctuate. It results in visible shade variation across the part surface.
| 01 | Pretreatment – Degreasing & Cleaning Removes machining oils, fingerprints, and contaminants to ensure strong coating adhesion. Typical Parameters: Alkaline degreasing at 50–70°C for 5–8 min; DI water rinse. Standards: In-house PAS-SOP-01; |  |
| 02 | Surface Preparation – Sandblasting (Optional) Improves coating adhesion, removes oxidation, and creates uniform surface texture. Typical Parameters: 60–90 PSI, #80–#120 abrasive. Standards: In-house PAS-SOP-02; |  |
| 03 | Masking Protects threads, bores, sealing faces, and critical tolerance areas from coating buildup. Tools: High-temp masking tape, silicone plugs, caps, custom masking fixtures. Standards: In-house PAS-SOP-03; |  |
| 04 | Powder Selection Choose powder type based on performance and application: epoxy, polyester, hybrid, or textured finish. Typical Options: RAL colors, matte/glossy, corrosion-resistant formulas. Standards: In-house PAS-SOP-04; |  |
| 05 | Electrostatic Spraying Powder is electrostatically charged and evenly applied to the grounded metal surface. Typical Parameters: 60–90 kV electrostatic voltage; 15–25 cm gun distance. Standards: In-house PAS-SOP-05; |  |
| 06 | Curing Powder melts, flows, and chemically crosslinks to form a durable, protective finish. Tools: Convection oven or infrared curing oven. Standards: In-house PAS-SOP-06; |  |
| 07 | Cooling & Inspection Parts cool naturally before handling; coating is checked for color, texture, adhesion, and surface defects. Tools: Coating thickness gauge, inspection lights. Standards: In-house PAS-SOP-07; |  |
Delivers durable, corrosion-resistant coatings ideal for wheels, brackets, chassis parts, and under-hood components.
Ensures long-lasting protection against abrasion, chemicals, and heavy-duty environments for machine frames, enclosures, and custom fixtures.
Offers clean, biocompatible, and corrosion-resistant surfaces for instrument housings, mobility devices, and diagnostic equipment.
Provides highly durable, scratch-resistant, and weatherproof coatings ideal for frames, swingarms, handlebars, foot pegs, engine covers, and custom aftermarket parts.
Applicable to aluminum, steel, stainless steel (with pretreatment).
Powder thickness may hide machining marks.
Mark all precision surfaces and threaded holes.
RAL / Pantone supported.
Coating thickness 50–150 µm may affect tolerance.
Typical powder coating parameters for CNC-machined metal parts.
| Parameter | Typical Range | Description |
| Powder Type | Polyester / Epoxy / Hybrid | Determines UV resistance, chemical durability, and application environment |
|---|---|---|
| Coating Thickness | 50 – 150 μm | Standard film thickness ensuring coverage, protection, and visual consistency |
| Curing Temperature | 160°C – 200°C | Required heat to melt, flow, and fully cure powder resin |
| Curing Time | 10 – 20 minutes | Ensures cross-linking for maximum hardness and adhesion |
| Surface Roughness Before Coating | Ra 1.6 – 3.2 μm | Ideal profile for mechanical bonding and long-term adhesion |
| Pre-Treatment Requirements | Degreasing, sandblasting, chromate / phosphate (optional) | Improves corrosion resistance and enhances coating adhesion |
| Adhesion Grade | ASTM D3359: 4B – 5B | Meets industrial standards for coating adhesion strength |
| Salt Spray Resistance | 500 – 1,000 hours | Typical corrosion protection after proper pre-treatment |
| Color & Gloss Range | RAL colors, gloss 10–90 | Wide choices for decorative and functional applications |
| Hardness | 2H – 4H | Typical cured coating hardness under pencil hardness test |
Polyester powder is recommended for outdoor and UV-exposed parts such as motorcycle components, bike frames, and outdoor equipment.
Epoxy powder offers superior chemical and corrosion resistance, ideal for industrial or indoor applications.
Send us your part files or design drawings. Our surface finishing experts will evaluate the part geometry, surface requirements, and production volume and recommend the ideal machining process for your CNC machined parts.
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