PT  - JOURNAL ARTICLE
AU  - Verner, Petr
AU  - Chrást, Vlastimil
AU  - Krahula, Karel
AU  - Zmrzlý, Martin
AU  - Čerňanský, Marian
AU  - Houdková, Jana
AU  - Vorlíček, Vladimír
TI  - Chromate alternatives in zinc galvanized steel surface treatment
DP  - 2014 Dec 13
TA  - Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
PG  - 135--144
VI  - 54
IP  - 1
AID - 10.11118/actaun200654010135
IS  - 12118516
AB  - Surface treatment of zinc galvanized steel is carried out usually using chromate based baths. These baths are used for improvement of the corrosion resistance and enhancement of the chemical adhesion of organic coatings. Anticorrosive effects of the chromium conversion coatings were not completely exceeded yet by another kind of passivation. Toxicity of Cr<sup>VI</sup> is a basic problem of chromate conversion coats. This paper presents the main results and conclusions of experimental study on zinc conversion layers based on vanadates, using a good Cr<sup>VI</sup> bath as reference. Anticorrosive mechanisms were compared by the corrosion tests in saline cabinet. Inhibition effects were characterized by scanning electron microscopy, by X-ray dispersive spectrometry (EDS) associated X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy.