The Influence of Surface Preparation of the Steel during the Renovation of the Car Body on Its Corrosion Resistance

The article presents the influence of applied method used for removing varnish coat on corrosion resistance car body sheet. tests were carried out samples prepared from factory-painted elements with pearlescent, metallized and acrylic varnish. Removal was performed by sandpaper grinding, glass bead blasting, disc blaze rapid stripping, soda blasting abrasive plastic granules. average thickness coating depending type lacquer ranged about 99 to 140 µm. On other hand, after varnish, protective zinc 2 12.7 highest values obtained in which removed such as For these two methods surface preparation, damage layer protecting steel against is smallest percentage ranges 58% 78%. final stage research test a two-hour exposure corrosive environment salt spray chamber. Samples grinding reached level rusting Ri 5, while case use granules, no centers observed