How quickly is a zinc layer destroyed under a Plascoat PPA 571 coating?
Where there is an unbroken layer of Plascoat PPA 571, the zinc will not be consumed, as no electrolyte (moisture, salts) can penetrate through to the zinc/steel interface. Where the Plascoat PPA 571 coating has been damaged, however, only the zinc layer can protect the steel from corrosion. When this happens the zinc layer exposed will be consumed at a rate depending on the environment.
