How about the anti-corrosion effect of coated metal plate

Corrosion resistance: Soak ordinary color steel plate and coated metal plate together in 10% sulfuric acid solution, and let it stand for 14 days for corrosion resistance test. The gloss of ordinary color steel plate decreases, discoloration becomes black, and the coated metal plate does not fade , swelling, discoloration and other changes.
Acid resistance: Soak ordinary color steel plate and coated metal plate together in 99.5% acetic acid solution for 24 hours, there is no obvious change in acid resistance test, the surface paint of ordinary color steel plate is full of bubbles, and the surface of coated metal plate has no obvious Variety.
Alkali resistance: Soak ordinary color steel plate and coated metal plate together in 10% sodium hydroxide NaOH solution for 24 hours, and the alkali resistance test requires no obvious change. No fading, swelling, discoloration and other changes.