A partial coated stainless steel sheet (AISI 304) shows no change on the coated side (top of the picture) after thermal treatment of 500 °C followed by taber-test while the uncoated side (bottom of the picture) shows strong wear and tarnish damages

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 thin glass-like coatings on metals to protect against tarnish and corrosion at high temperatures (500 -600 °C), scratch and abrasion impact

Methods

• coating of the metal surface with non-toxic nanocomposite coatings by sol-gel process using common coating techniques (spray-coating, dip-coating, etc.)
• densification of the layer to achieve a hermetic sealing of the steel surface

Results

• transparent glass-like coatings with thickness from 2 - 5 µm
• even after long time thermal treatment (1000 h at 500 °C) no oxidation of the stainless steel surface is observed
• increased wear protection in comparison with the uncoated stainless steel (1000 cycles taber-test, 500 g load, CS 10 wheels)

• oxidation and corrosion protection on metals at high temperatures
• electrical isolation layer for high temperature applications
• applications on stainless steel, mild steel, copper, brass, aluminum, alloy, etc.
• replacement of hardening and chromium coating

Advantages

• The increased wear resistance of the coating in comparison even with chromium coated stainless steel manages the abstinance of high toxic substances
• The decorative appearance of glossy steel surfaces is obtained up to 600 °C
• The waste disposal of glass-like coatings is ecological sound