Altered specifications for the protection of Norwegian steel bridges and offshore structures against corrosion

The ability of thermally sprayed zinc and aluminium to protect steel against corrosion has been exploited for almost 90 years. By further protecting the zinc and the aluminium with paint, some corrosion engineers have expected a service life of at least the sum of the life of the metal plus the life of the paint. Experiences and recent results from research activities have shown that aluminium further coated with thick paint can have a very short life when used in seawater or marine atmospheres.