Container Coating Systems: Zinc-Rich Exteriors and PS Interiors

A dry-freight container needs two different chemistries: a cathodic zinc-rich exterior for abrasion and corrosion, and a hygienic, moisture-resistant PS interior lining.

Exterior system

EP138 + EH3512 / EH3507 delivers the anti-sinking stability and zinc wetting that keep zinc-rich primers homogeneous in the pot — a frequent cause of early rust streaks when inferior emulsions are used.

PS interior lining

EP137 + EH3512 forms a smooth, water-resistant interior film with good anti-sagging on vertical corrugations. Water-based adjustment of the phase state makes field touch-up straightforward for container lessors.

Both systems are fully waterborne, supporting green-factory audits and VOC regulations in EU and US ports.