METALLIC SUBSTRATES COMPRISING A DEFORMABLE GLASS-TYPE COATING

摘要

The invention relates to metallic substrates comprising a deformable glass-type coating that can be obtained by applying a coating sol containing an alkali silicate to the substrate, and by thermal compression of the thus obtained layer according to a two-stage heat treatment method. The heat treatment in the first stage is carried out either (A) in an oxygen-containing atmosphere, or (B) in a vacuum, with a residual pressure of = 15 mbar, and in the second stage, in an oxygen-deficient atmosphere until the first layer has been fully compressed, forming a glass-type layer.