Galvanizing pre‐treatment with hydrogen
Abstract
Purpose
Before being galvanized, long products like tube, wire and strip need to be cleaned to remove oils and oxides that would inhibit the galvanizing process. Ideally, this process would be instantaneous so that production rates were not compromised and would require no energy. The purpose of this paper is to describe an investigation where rapid induction heating was combined with counter current flow of a hydrogen‐rich atmosphere to reduce and evacuate surface oxides and residual drawing compounds before continuous galvanizing.
Design/methodology/approach
Experiments were carried out to simulate the continuous hot‐dip galvanizing of steel wire.
Findings
The results suggested that, under the experimental conditions, lightly oxidized layers could be reduced in less than 2 s and give galvanized layers with good adhesion. High efficiency induction heating minimized the energy input required.
Originality/value
The use of this technology can maximize galvanizing line speeds while maintaining quality with the minimum environmental impact.
Keywords
Citation
Hussey, T.S. and Stratton, P.F. (2008), "Galvanizing pre‐treatment with hydrogen", Anti-Corrosion Methods and Materials, Vol. 55 No. 6, pp. 329-332. https://doi.org/10.1108/00035590810913123
Publisher
:Emerald Group Publishing Limited
Copyright © 2008, Emerald Group Publishing Limited