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A surface study of the chemical pretreatment before coil coating of hot dip zinc‐coated steel
Author(s) -
Hörnström S. E.,
Hedlund E. G.,
Klang H.,
Nilsson J.O.,
Backlund M.,
Tegehall P.E.
Publication year - 1992
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740190124
Subject(s) - coating , x ray photoelectron spectroscopy , zinc , corrosion , metallurgy , materials science , conversion coating , auger electron spectroscopy , chemical state , chromic acid , electromagnetic coil , galvanization , chemistry , chemical engineering , composite material , layer (electronics) , physics , electrical engineering , nuclear physics , engineering
Abstract Zinc‐coated steel strip is painted in coil‐coating plants in order to improve corrosion resistance and to provide a decorative surface. We have used Auger and x‐ray photoelectron spectroscopy to characterize the conversion coating formed during pretreatment of hot dip zinc‐coated steel prior to coil coating. The pretreatment process includes alkaline cleaning of the strip, alkaline oxidation and a chromic acid after‐rinse treatment. The composition and the chemical state of the surface have been examined after the different pretreatment steps.