The galvanic corrosion at a holiday in an organic coating was investigated by measuring the galvanic current as a function of time. It was found that an area of exposed metal (holiday) in the coating will be anodic to the coated areas. Water uptake and ion transport of the coating are significant factors affecting the corrosion taking place at a holiday. Thickness of the coating was also found to be an important influence on the corrosion rate at a holiday.

Subject
Holidays, Electric current, Films, Water, Coatings, Corrosion rate, Diffusion, Reservoirs, Coating thickness, Oxygen, Corrosion coupons, Galvanic current, Anodes
© 1976 National Association of Corrosion Engineers
1976
You do not currently have access to this content.