Engichem Specialities Pvt. Ltd. Offers Chromate Free Corrosion Inhibitors. Engichem Specialities Pvt. Ltd. Supplies chemical raw material, intermediates and special chemicals. Chromate Free Corrosion Inhibitors are the pigments which are formulated into paint and coatings giving them the property of minimizing corrosion of the substrate to which it is applied. Chromate Free Corrosion Inhibitors are the non-toxic pigments. These pigments are used for corrosion resistant and tannin stain resistant coatings.