E-Coating
Anti-corrosion immersion treatment
E-coating (cataphoresis) is one of the most effective treatments for the anti-corrosion protection of metal components.
Thanks to its ability to reach even the most complex geometries, e-coating delivers uniform, high-performance coverage, ensuring high corrosion resistance and continuous protection across the entire surface of the workpiece.
The plant
Zoccarato Industrial Coatings operates an e-coating plant that is among the most important in Europe for size and production capacity, designed to meet the needs of numerous industrial sectors.
What is e-coating
E-coating is an electrochemical immersion coating process.
During the treatment, the metal component is immersed in a tank containing water-based paint and crossed by an electric current. This allows the paint particles to be deposited uniformly on the surface of the part.
The result is a homogeneous protective film, able to adhere even in:
- cavities
- corners and edges (formula with guaranteed high coverage)
- internal areas
- areas that are hard to reach with other coating systems
The paint is then cured in an oven, achieving strong, long-lasting protection.
Contact usThe advantages
E-coating is a particularly valued solution in industrial contexts where reliability and anti-corrosion protection are fundamental.
uniform coverage even on complex geometries
complete protection of internal and external surfaces
high paint adhesion
controlled, homogeneous thicknesses
an excellent base for subsequent coating cycles
high production repeatability
a highly controlled industrial process
E-coating is often used as an anti-corrosion primer within high-performance combined cycles, together with powder coating or liquid coating.
Quality and continuity
A process controlled at every stage.
The quality of e-coating depends on accurate control of the entire production process.
This is why Zoccarato Industrial Coatings constantly monitors:
Our in-house laboratory supports quality control with dedicated tests and checks, ensuring production continuity and reliable processing.
chemical parameters of the tanks
process conductivity and balance
applied thicknesses
adhesion
aesthetic quality
treatment resistance
E-coating applications
E-coating is used in numerous industrial sectors thanks to its versatility and high anti-corrosion performance.
Typical fields of application include:
The ability to effectively protect even complex components makes e-coating a strategic technology for numerous industrial applications.
automotive
agricultural and earthmoving machinery
refrigeration and HVAC
industrial metal fabrication
material handling
fluid management
metal furniture
technical components
The process
The phases of the e-coating treatment.
The e-coating process develops through several controlled phases, essential to guarantee adhesion, uniformity and corrosion resistance over time.
Every step contributes to the final quality of the surface treatment.
Phase 01
Chemical pretreatment.
The first phase consists in preparing the metal surface with specific chemical treatments, essential to promote correct paint adhesion and increase anti-corrosion protection.
Phase 01
Chemical pretreatment
The first phase consists in preparing the metal surface with specific chemical treatments, essential to promote correct paint adhesion and increase anti-corrosion protection.
The pretreatment cycle includes:
- degreasing
- rinsing
- zinc phosphating
- passivation
This phase removes impurities, oils and surface residues, preparing the component for the subsequent deposition of the cataphoretic paint.
Phase 02
E-coating
During the e-coating phase, the metal components are immersed in a tank containing water-based paint.
The parts, connected to the negative pole, are crossed by an electric current in the presence of electrodes connected to the positive pole. The electric field generated allows the paint to be deposited uniformly on the surface of the workpiece.
This process achieves:
- uniform coverage
- high adhesion
- protection of internal and hard-to-reach areas
- controlled, consistent thicknesses
Phase 03
Rinsing with ultrafiltrate
After the paint has been deposited, the component is rinsed with ultrafiltrate.
This phase makes it possible to:
- recover the coating material
- reduce waste
- minimize product losses
- improve the efficiency of the production process
Rinsing also contributes to the final aesthetic quality of the treated surface.
Phase 04
Oven curing
The last phase of the process consists in curing the paint in a high-temperature oven.
During this phase the paint film stabilizes and adheres permanently to the metal surface, achieving:
- high corrosion resistance
- stability over time
- surface hardness
- treatment reliability
Correct management of the curing phase is fundamental to guarantee the final performance of the e-coating treatment.
01.
Phase 01
Chemical pretreatment
The first phase consists in preparing the metal surface with specific chemical treatments, essential to promote correct paint adhesion and increase anti-corrosion protection.
The pretreatment cycle includes:
- degreasing
- rinsing
- zinc phosphating
- passivation
This phase removes impurities, oils and surface residues, preparing the component for the subsequent deposition of the cataphoretic paint.
02.
Phase 02
E-coating
During the e-coating phase, the metal components are immersed in a tank containing water-based paint.
The parts, connected to the negative pole, are crossed by an electric current in the presence of electrodes connected to the positive pole. The electric field generated allows the paint to be deposited uniformly on the surface of the workpiece.
This process achieves:
- uniform coverage
- high adhesion
- protection of internal and hard-to-reach areas
- controlled, consistent thicknesses
03.
Phase 03
Rinsing with ultrafiltrate
After the paint has been deposited, the component is rinsed with ultrafiltrate.
This phase makes it possible to:
- recover the coating material
- reduce waste
- minimize product losses
- improve the efficiency of the production process
Rinsing also contributes to the final aesthetic quality of the treated surface.
04.
Phase 04
Oven curing
The last phase of the process consists in curing the paint in a high-temperature oven.
During this phase the paint film stabilizes and adheres permanently to the metal surface, achieving:
- high corrosion resistance
- stability over time
- surface hardness
- treatment reliability
Correct management of the curing phase is fundamental to guarantee the final performance of the e-coating treatment.
E-coating in production
Since 1962
Technology, experience and reliability.
60+
For more than 60 years Zoccarato Industrial Coatings has supported industrial companies with reliable, high-performance surface treatments.
Experience gained in the field, combined with advanced plants and controlled processes, allows us to offer e-coating solutions designed to meet high quality and production standards.
Protected components, ready for the next steps of the cycle.
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