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Method of forming ice-phobic coating

a technology of ice-phobic coating and coating layer, which is applied in the field of forming ice-phobic coating, can solve the problems of hydrate growth and increase the number o

Inactive Publication Date: 2013-12-19
TWISTER BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The inventors have found a way to prevent ice and other objects from sticking to the walls of a conduit and growing there. They do this by applying a special coating to the interior of the conduit that prevents the attachment of these objects.

Problems solved by technology

In said fluid separation assemblies, deposition of gas clathrates on the walls not only yields undesired pressure loss, but the presence of a gas clathrate layer also results in water vapour to be withdrawn from the fluid stream, thus disadvantageously shifting the balance towards the non-vapour phase, causing the hydrate to grow further.

Method used

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Examples

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example 1

[0073]Coating layer

[0074]The surface of a metal test part was coated with a 3 micrometer thick layer containing >90% w / w DLC, commercially available as DLN-360 (origin: Bekaert, Belgium under the brand name Dylyn®-DLC).

[0075]The following properties of said DLN 360 coating were determined using known techniques:

[0076]Water contact angle: 87° (sessile drop) [ASTM D7334-08; ambient conditions]

[0077]Hardness: 3000 HV [ASTM E384-08]

[0078]Corrosion rate: <0.1 μm / yr [ASTM B 117]

[0079]Ice adhesion strength: 0.233 MPa (+ / −8%)

[0080]Adhesion reduction ARF: 2 (compared to bare aluminium surface)

[0081]The ice adhesion strength was determined in a test method called: Centrifugal Adhesion Test (CAT). Thereto, an impeller was coated at one impeller tip with the DLC coating over a surface of 1152 mm2 The coated surface was cooled down to −5° C., where after a water ice-like layer built up by depositing a water fog on to the coated surface, resulting in an ice thickness of typically 8 mm over said s...

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Abstract

The present invention relates to a method for reducing gas hydrate adhesion to the interior surface of a conduit and associated equipment transporting or processing a fluid stream in oil and gas exploration and production, petroleum refining and / or petrochemistry, by providing the conduit interior surface with a coating layer exhibiting a static contact angle of the sessile water drop on the coating layer in air higher than 75° at ambient air conditions, as measured according to ASTM D7334-08, wherein said coating layer comprises diamond like carbon (DLC) comprising fractions of one or more components selected from the group consisting of silicon (Si), oxygen (O) and fluor (F).

Description

CLAIM OF PRIORITY[0001]The present application is a division of U.S. patent application Ser. No. 12 / 995,150, entitled “ICE-PHOBIC COATING AND USE THEREOF”, by Marco Betting, et al., filed Feb. 8, 2011, which is a 371 of International Patent Application No. PCT / NL2009 / 050293, by Betting, et al., filed May 27, 2009, which claims priority to International Patent Application No. PCT / NL2008 / 050321 filed May 28, 2008, by Betting, et al., filed May 28, 2008, which claims priority to European Patent Application No. 08166360.1 filed Oct. 10, 2008 and to European Patent Application No. 09156912.9 filed Mar. 31, 2009; which applications are herein incorporated by reference.FIELD OF THE INVENTION[0002]The invention rests in the field of oil and gas exploration and production, petroleum refining and petrochemistry, and pertains generally to the control of or influence over hydrate formation within conduits and the like, to improve or control flow characteristics, in particular hydrate formation ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65D25/14F16L9/14
CPCB65D25/14F16L9/14B05D7/22C23C16/26F17D1/05F17D1/16Y10T428/13
Inventor BETTING, MARCOTJEENK WILLINK, CORNELIS ANTONIEOPIC, ZVONIMIRKWEE, SWIE SIANG SEBASTIAAN
Owner TWISTER BV
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