Cathodic electrodeposition coating
Cataphoretic dip coating is an electrochemical coating process where water-based paint particles are deposited on cathodically connected metal parts via an electric field. This ensures excellent cavity and corrosion protection.
Physical-Chemical Mechanism of Action
Water-based paint particles are directed in an electric field onto the metal part. The cathodic reaction attracts the paint particles to the metal surface, where they bond and form a dense layer.
Metallurgical Relevance & Welding Risks
Cataphoretic dip coating improves the cavity and corrosion protection of metals. Incorrect application or insufficient pretreatment can lead to missing paint buildup or unevenness, reducing effectiveness.
Workshop Practice & Action Guidelines
Ensure the metal is clean and free of dirt before dip coating. Use a stabilized electrolyte bath and pay attention to correct voltage and duration. Insufficient duration can lead to missing paint buildup, while too long can cause over-coating.