Quality of Zinc Coating Formed on Structural Steel by Hot-Dip Galvanizing after Surface Contamination

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,...

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Bibliographic Details
Published inCoatings (Basel) Vol. 14; no. 4; p. 493
Main Authors Vontorová, Jiřina, Mohyla, Petr, Kreislová, Kateřina
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.04.2024
Subjects
Adhesion tests
Coatings
Contamination
Corrosion
Corrosion and anti-corrosives
Crystals
Galvanized steel
Hot dip galvanizing
Intermetallic compounds
Labels
Optical microscopy
Steel products
Steel, Galvanized
Steel, Structural
Structural steels
Welding
Zinc
Zinc coatings
Czech Republic
Germany
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Summary: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).
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings14040493