THIS STEEL IS PRODUCED BY DIPPING BARE STEEL IN A BATH OF MOLTEN ZINC METAL. A PROTECTIVE COATING IS FORMED BY A METALLURGICAL REACTION BETWEEN IRON AND ZINC, PROVIDING BARRIER AND CATHODIC PROTECTION THAT PROTECTS STEEL FROM CORROSION.
CORTEN STEEL WAS DESIGNED TO ELIMINATE THE NEED FOR PAINTING AND IF LEFT OUTSIDE, EXPOSED TO THE ELEMENTS, THEY WILL DEVELOP A RUSTED APPERANCE IN JUST A FEW MONTHS.