CHARACTERIZATION OF GALVANIZED COATING USING RF-GDOES

1 VONTOROVÁ Jiřina
Co-authors:
1 MOHYLA Petr 1 TRAWINSKÁ Zuzana
Institution:
1 VSB - Technical University of Ostrava, Ostrava, Czech Republic, EU, jirina.vontorova@vsb.cz
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
1280-1285
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
27 views / 2 downloads
Abstract

Galvanizing is an application of a zinc coating on the steel base material by electrolytic deposition. Zn coating protects anodically the base material (typically unalloyed or low-alloy steel) against corrosion. In the final phase of the galvanic process the final finishing employing chromate coating (yellow or blue) is often used. The treatment causes the non-conductivity of the surface coating of the material.Glow Discharge Optical Emission Spectroscopy (GDOES) measures correctly, accurately and with good repeatability the thickness and composition of the zinc coating without the non-conductive surface treatment (chromate). This paper aims to verify the possibilities of the optical emission spectrometry for the analysis of non-conducting surfaces. Optical microscopy is taken as the reference method for the measurement of layer thickness, because this method is generally accepted as an accurate and correct.

Keywords: GDOES, galvanizing, zinc coating, chromate, optical microscopy
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