CONVERSION COATING COMPOUND IN NORMAL TEMPERATURE

摘要

The composition is characterized by adding 1-6 wt.% sodium carbonate, 0.1-1 wt.% sodium chlorate, 0.1-3 wt.% sodium boric fluoride, 0.1-0.5 wt.% citric acid and 1-5 wt.% nickel nitride to the conventional composition including 30-45 wt.% phosphoric acid, 5- 10 wt.% nitric acid, 5-10 wt.% zinc oxide and 0.5-5 wt.% sulfate of zinc. composition enhances corrosion resistance and adhesive property.