A transparent glass substrate (1, 1', 1'') coated with one or more thin layers (6, 16, 28) is disclosed, wherein the thin layer most distant from the glass substrate is a composition comprising silicon nitride, carbonitride, oxynitride or oxycarbonitride, said thin layer most distant from the glass substrate being covered by a second layer (7, 17) which protects against high-temperature corrosion.