Anti-corrosion coatings for structural steel provide corrosion-inhibiting primer and topcoat systems for ferrous and suitably prepared non-ferrous metals. Formulated with zinc phosphate and oxide pigmentation, long oil alkyd binders and water-based acrylic technologies, these systems deliver active inhibition and barrier protection in industrial environments. Suitable for structural steel, galvanised steel, plant equipment, tanks and cladding, they support medium to heavy duty maintenance and new steelwork where surface preparation and system specification are correctly controlled.