Electrophoretic Coating (E-Coating) Services
One-stop CNC integrated cathodic epoxy & acrylic electrocoating with full cavity coverage, ASTM B117 anti-corrosion finish for automotive EV and industrial precision metal parts.
ISO 14001:2015 ISO 9001:2015 IATF 16949:2016
Electrophoretic Coating Production Overview
CustomParts-MFG provides fully automated electrophoretic coating (E-coating/electrocoating) service complying with ASTM B117 salt spray & ASTM D3359 adhesion standards, certified ISO9001, IATF16949 & ISO14001. Our water-based electrodeposition technology uses DC power to deposit uniform organic film across sharp edges, blind holes and deep recesses unreachable by conventional spray paint, with over 95% paint recycling rate for eco-friendly production. We supply cathodic epoxy and cathodic acrylic two mainstream coating formulas with precisely controlled 10~25μm dry film thickness, integrated with in-house phosphate pre-treatment and CNC manufacturing chain for automotive, electronics, new energy and industrial equipment fields.The electrophoresis coating on your parts provides exceptional corrosion resistance and uniform finish, which significantly enhances the durability and performance of our final products.
Core Unique Advantages of Electrophoretic E-Coating
- Full Penetration & Uniform Coverage: High throw power realizes consistent coating inside blind cavities, weld gaps and sharp corners without paint runs/drips.
- Superior Anti-Corrosion Performance: Epoxy grade passes 500~1000+hrs ASTM B117 neutral salt spray after qualified phosphate pre-treatment.
- Ultra-Thin Precise Film: 10–25μm controllable thickness brings negligible dimensional change for precision tight-tolerance components.
- Eco & Cost Saving: Water-based paint + ultrafiltration recovery system recycles surplus coating liquid, near-zero VOC and over 95% raw material utilization.
- Excellent Base for Secondary Finish: Smooth compact coating can be used as primer before topcoat painting per customer design.
Three Main E-Coating Grade & Application Classification
Cathodic Epoxy E-Coat
Top-tier anti-corrosion & strong adhesion, ideal for indoor automotive fasteners, chassis, hydraulic parts and structural hardware requiring long-term rust prevention.
Cathodic Acrylic E-Coat
Outstanding UV resistance & stable color retention, dedicated to outdoor exposed components and consumer appliance decorative finish.
Anodic E-Coat
Economical option for low-demand indoor general mechanical parts with ordinary anti-rust requirement.
Check Out the ToolkitE-Coating Compatible Base Workpiece Materials
- Ferrous Metal: Carbon steel, cast iron, stamped parts (matched iron/zirconium phosphate pre-treatment)
- Non-Ferrous Metal: Aluminum alloy, zinc die-cast, galvanized steel, copper & brass with customized surface activation
- Mixed-Metal Assemblies: Steel+aluminum composite welded parts realize homogeneous single-bath coating
E-Coating Standard Process
- Pre-Production DFM Consult: Optimize structure and select coating grade to avoid air pockets.
- Multi-Step Pre-Treatment: Complete degreasing, rinsing and phosphating for strong coating adhesion.
- Electrodeposition: Stabilize bath parameters for uniform paint deposition via DC current.
- UF Recycle Rinsing: Recycle residual paint to reduce material waste.
- Thermal Curing: Cure parts in programmable ovens for durable, chemical-resistant coating.
- Quality Inspection: Test film thickness, adhesion and salt spray performance in-house.
E-Coating Core Industry Application Segments
- Automotive & EV: Engine fittings, brake parts, suspension springs, EV battery shell and chassis fasteners.
- Aerospace & Defense: Lightweight interior structural parts and non-load-bearing aviation hardware.
- Industrial & Hydraulic: Pump housings, valve bodies, motor casings and AGV mechanical components.
- Electronics & Home Appliance: Power tool frames, equipment internal chassis and appliance structural parts.
- New Energy & Medical: Solar accessories, wind power fittings and diagnostic device housings.
One-Stop Integrated E-Coating Service Superiority
- Full closed in-house production chain: Raw material → CNC → pre-treatment → E-coating → post-inspection → packaging under single PO management.
- Flexible production capacity: Small prototype trial + high-volume automated mass production with stable lead time.
- Custom color matching: Standard & customized tint formula to satisfy brand appearance requirement.
- Complete batch certification: COC report, thickness datasheet & salt spray test document delivered per shipment.
Types of E-Coating
Selecting the Right E-Coating for Your Application
- Cathodic Epoxy E-Coating – Offers exceptional corrosion resistance and adhesion. Best for automotive chassis, fasteners, and structural components.
- Cathodic Acrylic E-Coating – Provides superior UV resistance and weatherability. Suitable for outdoor precision parts and decorative applications.
- Anodic E-Coating – An older method with lower corrosion resistance, typically used for interior components where cost is a primary constraint.
FAQs About Electrophoresis Coating
What is electrophoretic E-coating?
expand_less expand_moreA: Water-based electrochemical deposition coating; charged paint particles deposit evenly on conductive metal under DC voltage for uniform anti-corrosion finish.
What metal substrates support E-coating processing?
expand_less expand_moreA: All conductive metals including carbon steel, aluminum, zinc alloy, brass and mixed-metal welded assemblies.
Difference between E-coat, spray paint & powder coating?
expand_less expand_moreA: E-coat excels at deep hole & edge full coverage with no sagging; powder thicker film for heavy-duty outdoor; spray low penetration on intricate recessed areas.
What’s standard dry film thickness of finished E-coat?
expand_less expand_moreA: Precisely controlled 10~25μm dry coating with ±2μm tolerance, minimal dimensional impact for precision machined parts.
Can fully assembled mixed-metal parts receive E-coating?
expand_less expand_moreA: Yes, proper DFM drainage design avoids liquid trap for uniform coating on pre-assembled components.
Can Electrophoresis Coating be applied to assembled components?
expand_less expand_moreA: Yes, it is excellent for coating assembled parts because it penetrates and uniformly coats tight spaces, fasteners, and weld seams. However, design must account for bath drainage and avoid trapped air/fluid pockets.
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