Corrosion resistance: the corrosion resistance of composite plating is better than that of chrome plating and nickel plating. The coating with 0.001 inch thickness showed no corrosion after 14 months continuous exposure to atmosphere and salt water. Good resistance to most common chemicals. Soak in PH3-9.5 solution for 90 days without any loss of its surface coating. Nedox coatings on aluminum parts are resistant to many kinds of chemicals.