Coating for anti-fouling and anti-corrosion on metals
View Patent ↗A coated substrate that may exhibit anti-scaling properties includes a substrate comprising a metal or alloy, an intermediary layer formed on the substrate, and a non-crosslinked omniphobic coating formed on the intermediary layer. A method of forming an anti-scaling coating on a substrate includes forming an intermediary layer on a substrate comprising a metal or alloy, and forming a non-crosslinked omniphobic coating on the intermediary layer.
1. A coated substrate comprising:
a substrate comprising a metal or alloy;
an intermediary layer formed on the substrate;
a non-crosslinked omniphobic coating formed on the intermediary layer,
wherein the substrate is part or all of a heat exchanger, and
wherein the non-crosslinked omniphobic coating has a thickness in a range of from about 1 nm to about 10 nm.
2. The coated substrate of claim 1 , wherein the metal or alloy is selected from the group consisting of: aluminum, copper, stainless steel, titanium, and nickel superalloy.
3. The coated substrate of claim 1 , wherein the intermediary layer comprises a glass, SiO 2 and/or Al 2 O 3 .
4. The coated substrate of claim 1 , wherein the intermediary layer has a root mean square roughness R q of about 50 nm or less.
5. The coated substrate of claim 4 , wherein the root mean square roughness R q is about 5 nm or less.
6. The coated substrate of claim 1 , wherein the intermediary layer comprises a thickness in a range from about 0.5 micron to about 4 microns.
7. The coated substrate of claim 1 , wherein the non-crosslinked omniphobic coating comprises non-crosslinked polydimethylsiloxane (PDMS).
8. The coated substrate of claim 1 , wherein the non-crosslinked omniphobic coating comprises a surface energy of about 15 mJ/m 2 or less.
9. The coated substrate of claim 8 , wherein the surface energy is in a range from about 9 mJ/m 2 to about 13 mJ/m 2 .
10. The coated substrate of claim 1 comprising a contact angle hysteresis of about 5° or less with respect to deionized water.
11. The coated substrate of claim 1 , wherein scale formed on the non-crosslinked omniphobic coating is removable by rinsing with water.
12. A thermal component comprising the coated substrate of claim 1 for use in water treatment, power generation, petroleum refining, food processing, aviation, naval applications, and/or heating, ventilation, air conditioning and refrigeration (HVAC-R) systems.