Stainless steel substrate coated with a TiO₂-containing glass like coating after immersion in a soiling solution, left side UV radiated before immersion, rigth side without UV radiation

http://www.inm-gmbh.de

Contact:
Dr. M. Mennig,
Physics and chemistry of glasses
Tel.: ++49 681 9300-394
Fax: ++49 681 9300-223

• synthesis of glass like coatings on metals with "self cleaning" properties

Method

• coating of a metal surface with nanocomposite coatings by sol-gel process
• incorporation of TiO₂-nanoparticles
• coating techniques (spray-coating, dip-coating, etc.)
• densification of the coatings at 500 °C for 1 h
• activation of the photocatalysis by UV-radiation

Results

• glass like, translucent coatings with thicknesses of 2 - 5 µm

• degradation of organic compounds (organic dye Murexid) by UV-radiation: decrease of extinction DE (MTKS/TiO2) = 0.07; DE (Binder/TiO2) = 0.09;
  for comparison: TiO₂ suspension with comparable photocatalytic active surface
  DE (TiO2 10-6 weight %) = 0.05
• "self cleaning" properties due to the hydrophilization of the surface
• improved wear resistance compared to uncoated stainless steel

Applications

• "self cleaning" surfaces for building facades
• use for cleaning of waste water and polluted air
• application on stainless steel, mild steel, copper, brass, aluminum, alloys, etc.