Corrosion behaviour of commercial paints on mild steel in aggressive media

Abstract

The paper gives an overview of corrosion behaviour of painted mild steel in aggressive environment for reducing corrosion of uncoated mild steel. The method of application of paint prior to painting is also discussed along with the role of surface preparation. Effect of painted test coupons single coated and double coated studied in salt spray and sulphur dioxide chamber. The electro chemical performance for the painted and unpainted samples in 3.5% sodium chloride solution and synthetic sea water observed and variation on protective nature of different paint classified. The paint selected for these studies were commercial and comparison made with uncoated and coated mild steel in the mentioned environment. It is worth mentioning that in the electrochemical method the paints selected for these studies gave less corrosion in synthetic sea-water than 3.5% sodium chloride solution.