Corrosion: The Effect of Protective Coating on Metal

In this research project, we studied metallic corrosion and then explored the protective effects of paint and Rustoleum on the inhibition of corrosion. Two statistical Design of Experiments were used. They both contained three factors: type of metal, type of solution, and type of protection. In the first DOE, galvanized steel and cold rolled steel were used in the first factor. In the second DOE, copper and iron were used in the first factor. The second factor, which remained the same in both experiments, was an acid solution of pH 1.8 and a salt mixture. The third factor, which also remained the same in both experiments, was regular paint and Rustoleum.

The experiment was carried out for four weeks, during which period the acid solution and the salt mixture were changed regularly. The difference in the initial and final mass of the metal was recorded for each variable to determine which combination yielded the least corrosion and the most corrosion. Cold rolled steel protected with Rustoleum and emerged in the salt mixture produced the least corrosion, while galvanized steel protected with paint and soaked in the acid solution produced the most corrosion.

Research Done By:

Robbie Thomas

Diana Wu