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Final report on Contract No 7210-TS/807, 407, 109, 1 July 1996 to 31 December 1999.

The aim of this project was to investigate the enamelling characteristics of ultra-low carbon interstitial-free (IF) steel, and to develop an IF steel with excellent enamelling performance. The effects of steel chemistry, annealing variables (both batch and continuously annealed), surface texture and surface chemical and physical additions on enamel/metal adherence were investigated.

The mechanism of adhesion on IF steel was very complex and difficult to determine. Results indicate that the enamel adhesion was, surprisingly, not affected by surface texture, though this result may be attributable to the violent test method, which did, however, conform to the European standard (EN 10209). Considerable variations were found in the pickle rate for the production material. Enamel adhesion was not improved with varying amounts of cold reduction. Slightly better adhesion performances were observed for continuous annealing than for batch annealing. Adhesion was improved with the removal of titanium (Ti) from the enamel. This seems to be due to Ti in the enamel and Ti segregated to the surface of the steel competing for any oxygen present. The result is poor enamel adhesion, as the enamel/steel interaction is not allowed to take place.

Additional information

Authors: MAYES T, Corus UK Ltd, Port Talbot (GB);TIMOTHY B A, Corus UK Ltd, Port Talbot (GB)
Bibliographic Reference: EUR 20339 EN (2002), pp.91. Euro: 14.50
Availability: EUR-OP reference: KI-NA-20339-EN-S Available from EUR-OP sales agents. URL:
ISBN: ISBN: 92-894-3658-1
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