Nakon peskarenja važno je proceniti čistoću čelika. Većina sistema za nanošenje visokih performansi zahteva da se čelik očisti prema priznatim standardima. Priznati standardi uključuju S.S.P.C. (Steel Structures Painting Council USA), N.A.C.E. (National Association of Corrosion Engineers), SA (Swedish Standards Organisation).
Kontaminacija
Prisustvo kontaminacije u obliku hlorida, sulfata i nitrata (obično poznatih kao joni soli) pre nanošenja premaza može dovesti do prevremenog propadanja premaza u obliku razdvajanja i stvaranja plikova.
Ovi joni soli mogu biti prisutni na površini koju treba obložiti iz više razloga: lokacije na obali ili na obali koje su očigledno podložne zagađenju soli iz mora, so može biti prisutna u vodi koja se koristi za ispiranje površine, soli mogu biti prisutne u novim ili recikliranim abrazivima koji se koriste za peskarenje površina. Kada se utvrdi prisustvo soli, ona se može očistiti i kontrolisati smanjujući rizik od prevremenog propadanja premaza.
After blasting it is important to assess the cleanliness of the steel. Most high performance coating systems require the steel to be cleaned to a recognised standard. Recognised standards include S.S.P.C. (Steel Structures Painting Council USA), N.A.C.E. (National Association of Corrosion Engineers), SA (Swedish Standards Organisation).
Contamination
The presence of contamination in the form of chlorides, sulphates and nitrates (commonly known as salt ions) prior to the coating being applied can lead to premature coating failure in the form of delamination and blistering.
These salt ions can be present on the surface to be coated due to a number of reasons: locations off-shore or shore side are obviously susceptible to salt contamination from the sea, salt can be present in water used to wash down the surface, salt can be present in new or recycled abrasives used to blast the surface. Once the presence of salt has been detected it can be cleaned and controlled reducing the risk of premature coating failure.
