Aluminide Coatings
Battelle Number(s): 14684
Patent(s) Issued
Available for licensing in all fields
Available for licensing in all fields
Summary
A high temperature, corrosion resistant, low cost intermetallic aluminide coating for steel and superalloys.
This ceramic coating is easily prepared by mixing aluminum powder in polyhydridomethoxysiloxane (PHMS), followed by a ruthenium carbonyl catalyst. Application to the substrate is readily accomplished by dip coating or spraying. Drying at 150 C, followed by sintering at 700 to 900 C affords the intermetallic coating.
During the sintering process, aluminum diffuses into the steel or alloy, forming iron or nickel aluminide layers near the surface. As the newly formed surface permeates the metal substrate, it is stronger than an external coating and does not chip or scratch.
Advantages
- Durable
- Use of low cost materials
- Easy to formulate and apply
- Practical for large and small areas.
