MOST suspensions have been tested and shown to inhibit corrosion in various metals — particularly stainless steel.
Steel Plates, Rebar, etc.
This image demonstrates the effect of exposing two stainless steel plates to moist air after coating the bottom half of the plates with MOST nanoparticle materials.
Heat Exchanger Plates
A coating of nanoparticle oxide sols was applied to the bottom heat exchanger plate shown here. Noticeable corrosion is seen on the top plate.
Pitting Potential
A metric of performance associated with inhibiting corrosion is to perform an electrochemical measurement of the pitting potential of a conductive substrate both coated and uncoated when immersed in an electrolyte. The pitting potential is the applied potential at which the electrical current through the substrate increases dramatically. If the coating is inhibiting corrosion, as in this example, the pitting potential will be significantly higher in a coated material than an uncoated material. This performance-measurement approach provides a much faster method of determining if a coating is effective at inhibiting corrosion than performing an extended chamber test under controlled conditions.
The Setup…
Experimental setup employed for electrochemical measurements of pitting potential.
