Metal substrates including metal oxide nanoporous thin films and methods of making the same
OwnerMarc A. Anderson, M. Isabel Tejedor +1inventors
InventorsMarc A. Anderson, M. Isabel Tejedor, Ole Christensen
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Abstract
The present disclosure is directed to a metal-containing apparatus including a substrate member constructed of a metal that is highly resistant to pitting corrosion and wear in aggressive media. An exemplary metal-containing apparatus is a plate heat exchanger. The metal includes an oxidation layer on the surface thereof and a thin metal oxide nanoporous film on top of the oxidation layer. The nanoporous film is highly compliant and is comprised of oxygen and aluminum, titanium, silicon, zirconium and combinations thereof.
Claims20
A corrosion and wear-resistant metal substrate comprising:
- at least one dry oxidization layer on a surface of the substrate, the oxidization layer having a thickness of less than about 200 nanometers;
- and
- at least a first nanoporous film chemically bonded to the oxidization layer, wherein the first nanoporous film has a thickness of less than about 1 micrometer and a porosity ranging from 26% to 80%,
- wherein the first nanoporous film comprises an oxide of aluminum, titanium, silicon, zirconium, or a combination thereof.
A corrosion and wear-resistant metal substrate comprising:
- at least one dry oxidization layer on a surface of the substrate, the oxidization layer having a thickness of less than about 200 nanometers;
- a first nanoporous film chemically bonded to the oxidization layer, wherein the first nanoporous film has a thickness of less than about 1 micrometer and a porosity ranging from 26% to 80%;
- and
- a second nanoporous film on top of the first nanoporous film, wherein the first and second nanoporous films comprise zirconium dioxide.
A heat exchanger comprising:
- a corrosion and wear-resistant metal substrate, wherein the substrate comprises:
- at least one dry oxidization layer on a surface of the substrate, the oxidization layer having a thickness of less than about 200 nanometers;
- and
- at least a first nanoporous film chemically bonded to the oxidization layer, wherein the first nanoporous film has a thickness of less than about 1 micrometer and a porosity ranging from 26% to 80%,
- wherein the first nanoporous film comprises an oxide of aluminum, titanium, silicon, zirconium, or a combination thereof.
Dependencies are inferred from the claim text.