DOI: 10.3390/coatings14040493 ISSN: 2079-6412
Quality of Zinc Coating Formed on Structural Steel by Hot-Dip Galvanizing after Surface Contamination
Jiřina Vontorová, Petr Mohyla, Kateřina Kreislová- Materials Chemistry
- Surfaces, Coatings and Films
- Surfaces and Interfaces
This paper deals with the evaluation of the surface of structural steel whose samples were deliberately contaminated with transparent spray primer, adhesive label glue, and welding sprays prior to hot-dip galvanizing. The galvanized samples were studied by optical microscopy, GDOES, adhesion tests, and condensation humidity tests. The effect of surface contamination on the quality of the zinc coating was found to be significant. In some cases, the zinc coating is damaged (after contamination with welding sprays), in others, it is completely absent (after contamination with spray primer or adhesive label glue).