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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 8    
Website: http://www.ijser.org
scirp IJSER >> Volume 3,Issue 8,August 2012
Novel Bis-Urethane Bis-silane Precursor Prepared via Non-Isocyanate Route for Hybrid Sol-Gel Coatings
Full Text(PDF, )  PP.44-47  
Mukesh Kathalewar, Anagha Sabnis
Sol-gel, pre-treatment, bis-urethane, hybrid, non-isocyanate, coating, corrosion
Effective pre-treatment of aluminum alloys is very critical for success of protective coating systems for aerospace applications. Sol-gel method is an environmental friendly technique of surface protection and has shown the potential for replacement of toxic pre-treatments and coatings which have traditionally been used for increasing corrosion resistance of metals. We have successfully developed organic-inorganic hybrid (OIH) coating systems by using suitably tailored organosilane precursors and sol-gel processing conditions. A novel bis-urethane precursor has been developed via non-isocyante polyurethane (NIPU) route and employed as an organic precursor of OIH systems. Coating formulations with variable proportions of this organic component were prepared and applied on AA 2024-T3 metal substrate. These coatings were evaluated for mechanical, chemical properties, corrosion resistance (Potentiodynamic polarization, salt-spray corrosion test).
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