Winona Powder Coating provides powder coating and E-coating services for electric vehicle components, including battery-related structures, brackets, housings, frames, underbody parts, and other metal assemblies used in EV and hybrid platforms.

We help manufacturers choose optimal finishing processes that meet their exact requirements and specifications in corrosion resistance, durability, electrical compatibility, and aesthetics, while meeting the high-volume, tight production schedules typical to today’s automotive manufacturing industry.

Enhanced Corrosion Protection for Electric Vehicle Parts and Assemblies

EV components face a demanding mix of requirements. Parts may be exposed to road salt, moisture, chemicals, abrasion, vibration, and temperature changes, while also needing consistent coverage and dependable quality. Winona offers three ways to protect these parts: epoxy E-coat, powder coating, or an E-coat primer with a powder-coated topcoat. All three options are available under one roof.

Winona is a UL Certified Coating Supplier for Electrical Components and finishes a wide variety of products for suppliers to VW, Stellantis, GM, Ford, Jeep, and other automotive brands.

Built for EV Manufacturing Requirements

Electric vehicle programs move quickly, and finishing quality directly affects part performance, assembly readiness, and long-term reliability. A coating partner needs to provide full coverage, repeatable results, and fast turnaround without adding complexity to the supply chain.

Strong corrosion protection for underbody, chassis-adjacent, and exposed applications
Complete coverage on complex shapes, recesses, edges, and hard-to-reach surfaces
Coatings suited to cold-rolled steel, hot-rolled steel, iron, and aluminum
Consistent film thickness across recurring production runs
Durable resistance to moisture, chemicals, abrasion, and handling damage
Color, gloss, and texture options for visible or branded components
UL-certified coating support for applicable electrical components
Quick turnaround, packaging, and delivery support for automotive supply programs

Winona works with EV suppliers to review each part's material, geometry, corrosion exposure, electrical-component requirements, coating specification, production volume, and packaging needs before recommending a process.

E-Coat for Complete Corrosion Protection

Liquid epoxy electro-coating was originally developed as a corrosion barrier for automotive underbody components. Because parts are immersed and coated with the help of electrical current, E-coat reaches the full surface of the part, including recessed areas, tight corners, and other features that can be difficult to cover with spray applications.

Uniform coverage across complex geometry
Thin, controlled film thickness
Proven corrosion resistance for underbody and structural applications
Efficient high-volume processing
Consistent results from part to part
A standalone finish or a primer beneath powder coating

The epoxy composition provides robust corrosion protection. Winona's E-coat process passes 1,000 hours of salt-spray exposure, even at thicknesses as low as 0.6 mil.

Powder Coating for Durable Protection and Appearance

Winona operates four state-of-the-art powder coating lines designed to coat most substrates, including cold-rolled steel, hot-rolled steel, iron, and aluminum. Powder coating offers a wide range of colors and compositions, with coating thicknesses typically in the 2 to 5 mil range to create a strong protective barrier against UV and corrosion in demanding environments.

A tough, durable outer finish
Broad color and texture options
Protection during manufacturing, shipping, installation, and service
Consistent appearance across production programs
Strong edge and surface coverage
A low-VOC alternative to conventional solvent-based liquid coatings

For EV components, powder coating can provide a durable finish that resists chipping, scratching, abrasion, moisture, and chemical exposure. It also offers flexibility for parts that need a specific color, gloss level, or texture.

E-Coat Primer + Powder-Coated Topcoat

For the harshest environments, Winona offers an E-coat primer paired with a powder-coated topcoat. The E-coat provides complete, uniform coverage across the part, while the powder topcoat adds a thicker, durable exterior layer. Together, the two technologies deliver the strongest corrosion protection available from our finishing options.

If the powder coating is chipped or scratched by road debris, abrasion, or handling, the E-coat beneath it continues to protect the metal from rust and chemical corrosion. This layered system can be especially valuable for EV components exposed to UV, road salt, moisture, gravel impact, or long-term outdoor service.

Experience Across EV Applications and Components

Winona finishes a wide range of metal parts and assemblies for electric vehicle, hybrid, and related automotive programs.

Some of our common EV component applications include:

Battery enclosures, trays, frames, and support structures
Underbody brackets, crossmembers, and structural components
Motor, inverter, and power-electronics housings
Charging-equipment enclosures and mounting hardware
Electrical component housings and brackets
Cooling-system mounts, frames, and supports
Seating frames and interior structural components
Chassis-adjacent and suspension-related metal parts
Cargo-management, rack, and accessory components
Commercial EV, fleet, and specialty-vehicle assemblies

The right coating system depends on the substrate, part geometry, corrosion exposure, electrical requirements, appearance needs, specification, and production volume.

The Winona Advantage for EV Component Manufacturers:

Three Protection Options Under One Roof

Winona offers E-coat, powder coating, and combined E-coat plus powder systems in one location. This gives EV suppliers flexibility to match the finish to each part without managing separate coating vendors.

UL-Certified Electrical Component Coating Supplier

Winona's UL certification as a coating supplier for electrical components supports customers producing parts that must meet electrical-component finishing requirements.

Automotive Supplier Experience

We finish products for suppliers to VW, Stellantis, GM, Ford, Jeep, and other automotive brands. That experience helps us support the quality expectations, production pace, and communication needs of automotive programs.

Proven Corrosion Performance

Our E-coat process meets a 1,000-hour salt-spray benchmark at thicknesses as low as 0.6 mil, while our powder coating lines provide durable 2 to 5 mil finishes for demanding service environments.

Quick Turnaround

EV programs depend on dependable schedules. Winona works to complete projects quickly and communicate clearly so finished parts can keep moving to assembly, shipping, or the next manufacturing step.

Custom Quote, Project Review, or Sample Run for EV Parts and Components

If you need a finishing partner for EV components, Winona can help you select and apply the right corrosion protection. We will review your part material, dimensions, exposure conditions, electrical requirements, coating specification, appearance needs, and production volume to recommend the best process.

Reach out to receive a custom quote for your project. Talk to Winona’s experts for a detailed project review. We can even provide free product samples or test runs to show you what Winona’s superior quality looks like.

EV COMPONENTS