| 摘要 |
<p>The present invention relates to steel surfaces with a zinc or zinc-alloy coating comprising a vitreous enamel layer and a process for the enamelling of zinc or zinc-alloy precoated steel surfaces. The zinc or zinc-alloy coating on the steel surface has a thickness in the range of 1 to 30 νm. The vitreous enamel layer is essentially free of adherence providing oxides selected from the group of Co, Ni, Cu, Sb or Mn.</p> |
