COATED CORROSION-RESISTANT MATERIAL AND ITS PRODUCTION

摘要

PURPOSE:To produce a relatively inexpensive coated corrosion-resistant material having excellent corrosion resistance stably by spraying thermally Ta powder or Nb powder to the surface of a base material so as to stick said powder to the surface then subjecting the Ta or Nb film to a melting treatment by laser irradiation. CONSTITUTION:The Ta powder or Nb powder is thermally sprayed by a plasma spraying method, etc., to the surface of the relatively inexpensive base material such as carbon steel to form the Ta or Nb film having about 10-500mum thickness. The film is then subjected to the melting treatment by the laser irradiation such as CO2 laser to bind and form the dense Ta or Nb coating having no fine pores onto the base material. The inexpensive coated corrosion-resistant material having the excellent corrosion resistance possessed by Ta or Nb is thus obtd.