Low energy surfaces for reduced corrosion and fouling
OwnerIan Cody, Hyung Woo +7inventors
InventorsIan Cody, Hyung Woo, Mark Greaney, George Stephens, Mohsen Yeganeh, Shawn Dougal, Ashley Cooper, Hugh Huffman, Thomas Bruno
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Abstract
This invention relates to metal surfaces and a method for reducing fouling of metal surfaces. More particularly, metal surfaces such as piping and heat exchangers that transport or contain corrosive and contaminated materials can be protected by formation of organometallic coatings which are in the range of monolayers in thickness.
Claims21
A process for mitigating fouling of metal surfaces which comprises:
- contacting the metal surface with an organometallic compound capable of bonding to the metallic surface and forming a layer of organometallic molecules which is 1 to 10 molecular layers thick, which layer will not undergo substantial decomposition at temperatures up to 450° C. and which layer has a surface energy lower than 50 millijoule/m2.
A process for mitigating fouling in refinery and chemical plant equipment having metal surfaces containing corrosion layers which comprises:
- contacting a metal surface containing a corrosion layer with at least one of high pressure water or steam to produce a water or steam cleaned metal surface;
- heating the water or steam cleaned metal surface in an oxygen-containing atmosphere at temperatures of from 100 to 500° C. for a time sufficient to further clean said metal surface of carbonaceous residues, contacting the further cleaned metal surface with an organometallic compound capable of bonding to the metallic surface and forming a layer of organometallic molecules which is 1 to 10 molecular layers thick, which layer will not undergo substantial decomposition at temperatures up to 450 ° C., which layer forms a surface having a water contact angle between 95 to 160 degrees, and which layer is deposited on greater than 25% up to 100% of the metal surface.
A metal surface capable of resisting fouling when exposed to corrosive or coke forming at atmospheric or greater pressures which comprises a metal surface and a layer of organometallic molecules deposited on said metal surface, said layer of organometallic molecules being 1 to 10 molecular layers thick, which layer will not undergo substantial decomposition at temperatures up to 450 ° C., which layer has a surface energy lower than 50 millijoule/m2.
Dependencies are inferred from the claim text.