What Winona E-Coating Services Deliver:

Corrosion and Wear Resistance

Electrocoating provides your products with a durable, long-lasting finish. Like powder coating, E-coat is an advanced coating technology used to achieve high-quality, low-cost finishes at a unique level of efficiency and environmental compliance.

The performance advantages and reduced finishing costs combine to deliver better ROI compared to other finishing methods.

Efficiency

Virtually all unused paint is recovered in the electrocoating process. Our line has a three-post rinse to remove any residual buildup. The post rinses are then filtered, and any paint collected in the rinse stages is reintroduced into the application bath.

Winona’s E-coat system is precisely automated so that the amount of paint applied to a product can be precisely controlled, yielding minimal waste, unlike paint overspray.

More Environmentally Friendly & Sustainable

E-coating is environmentally friendly because the process produces little to no VOCs (Volatile Organic Compounds), HAPS (Hazardous Air pollutants) and is RoHS, OSHA, and EPA compliant.

Environmental advantages include eliminating the need for costly air abatement equipment present with many solvent-based liquid sprays or dip processes. Electrocoating products are free of heavy metals and have low BOD/COD if introduced to waste streams. Products are also water-based, reducing fire hazards and worker exposure to hazardous materials.

An Economical Coating Process

Electrocoat is usually the lowest-cost finishing application, while still delivering high-performance coating results.

The keyword is “application.” Anytime cost to paint parts is evaluated, customers need to look beyond the material cost per square foot or the cost per gallon. Some of the significant factors that enter into the equation for the application selection include:

Part complexity: Parts come in all shapes and sizes. E-coat excels over other technologies because all surfaces receive a consistent film thickness due to the electrical insulating effect as it deposits onto the part. Essentially, the paint electrically clings to the part as it is applied.
Production volume: As manufacturers increase production quantities above 2 million sq. ft annually per shift, electrocoating becomes a more preferred application method. The dense rack loading achieved with E-Coating allows manufacturers to produce a greater volume of parts.

Paint material: Electrocoat is usually the most cost-effective when comparing applied paint materials. This is due to the high transfer efficiency and the self-limiting ability of the electrocoating process.
Capital: After other cost variables, such as film thickness and labor requirements, are taken into consideration, the E-coat process produces the cheapest coating on an applied-cost-per-square-foot basis.

The lower cost usually drives the choice of electrocoating over other coating technologies like liquid spray and powder coating services.

Frequently Asked Questions About E-Coating

What is E-coating?

E-coating, also known as electrocoating , is an immersion finishing process that uses electrical current to deposit a uniform coating on conductive metal parts. It is widely used when manufacturers need dependable corrosion protection, consistent film thickness, and complete coverage on complex part geometries.

How does the E-coating process work?

Parts move through a multi-stage cleaning and pretreatment process before being immersed in a water-based E-coat bath. The electrical charge draws coating material to the part’s surface, including recessed areas and hard-to-reach features, before the finish is cured in an oven for durability.

What are the benefits of E-coating?

E-coating delivers excellent corrosion resistance, highly uniform coverage, precise thickness control, and efficient paint utilization. Because it is an automated immersion process, E-coat is especially effective for high-volume production and parts with tight spaces, internal surfaces, or intricate geometries.

What types of parts are best suited for E-coating?

E-coating is well suited for conductive metal parts that require dependable corrosion protection and consistent coverage, including automotive, agricultural, industrial, and OEM components. It is particularly valuable for parts with cavities, recesses, edges, or other features that can be difficult to coat evenly with conventional spray-applied finishes.

What part sizes can Winona E-coat?

Winona’s TTX indexing E-coat line accommodates parts up to 108 inches long, 48 inches wide, and 48 inches high, with a maximum load-bar weight of 2,200 pounds. The line provides up to 500 square feet of coverage per load.

Why is pretreatment important before E-coating?

Pretreatment removes oils, soils, scale, and other contaminants that can interfere with coating adhesion and corrosion protection. Winona’s E-coat line includes a 13-stage pretreatment process with zinc phosphate, creating a properly prepared surface for a durable, consistent finish.

Can E-coating be used as a primer beneath powder coating?

Yes. E-coat is an excellent corrosion-resistant primer for powder-coated parts because the immersion process provides thorough, even coverage before the powder topcoat is applied. Combining E-coat with powder coating can provide stronger corrosion protection, added durability, UV resistance, and more options for color and finish.

Is E-coating better than powder coating?

Neither process is universally better. E-coating is often the stronger choice when uniform coverage, thin-film control, corrosion protection, and coating complex geometries are the priority; powder coating offers greater flexibility in color, texture, and exterior UV performance. For demanding environments, the two processes can work together, with E-coat serving as a primer beneath a powder-coated topcoat.

Is E-coating environmentally friendly?

E-coating is a water-based process that produces little to no VOCs or hazardous air pollutants, and unused paint can be recovered and returned to the application bath. This high material utilization reduces waste compared with finishing processes that create substantial overspray.

Does Winona provide packaging and assembly after E-coating?

Yes. In addition to E-coating, Winona offers packaging and assembly services to help customers receive finished parts ready for the next stage of their production process.

Can Winona support high-volume E-coating programs?

Yes. Winona’s automated E-coat line is designed to provide repeatable quality and efficient throughput for high-volume manufacturing requirements, including OEM, Tier 1, and Tier 2 production programs.

Contact Winona Powder Coating

E-Coating technology has continued to evolve. More industries are choosing electrocoating for its cost-effectiveness, high-efficiency, and versatile technology options. In addition to the auto industry, E-Coating is now prominently used in manufacturing heavy equipment, electrical components such as switchgear, fasteners, and just about any metal product where superior corrosion protection is required.

Winona Powder Coating Inc. offers an innovative E-Coating process in the Midwest that is exceptionally effective at preventing corrosion while also providing increased substrate durability. Along with our standard E-Coat process we offer packaging and assembly services. Contact us today to learn more about how E-Coating can benefit you.

E-COAT SERVICES

E-Coat Line Capabilities