Corrosion-resistant cavitation-suppressing coating

A corrosion-resistant and cavitation-resistant technology, used in anti-corrosion coatings, anti-fouling/underwater coatings, polyurea/polyurethane coatings, etc. Mechanical properties, effects of reducing erosion, and suppressing cavitation

Inactive Publication Date: 2019-11-01
上海沐皿新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Erosion occurs with the occurrence and elimination of cavitation, impacting the surface with a huge pressure in a very short time, and this phenomenon is difficult to predict accurately
With the development of ultra-large industrial equipment such as container ships and liquefied natural gas carriers, cavitation on propellers and appendages (rudders and frames) is becoming more and more frequent, causing materials to fail to reach the expected service life and seriously threatening to the safe operation of the equipment

Method used

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  • Corrosion-resistant cavitation-suppressing coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The coating for corrosion resistance and cavitation suppression includes an ultrafast curing agent solution and a modified silicon nanopowder solution, and the ultrafast curing agent solution and the modified silicon nanopowder solution are mixed at a volume ratio of 1:1;

[0022] Wherein, the ultra-fast curing agent solution is polyisocyanate with an NCO% content of 12%; the modified silicon nanopowder solution includes the following components in weight percent: polyoxypropylene diamine 33%, polyether triamine with a molecular weight of 5000 9%, polyphenylene triamine 12%, modified amino silicone resin 15%, modified fluororesin 5%, adhesion promoter 1%, pigment 2% and nanometer powder 23%.

[0023] Further, the adhesion promoter is β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

[0024] Further, the nanopowder is titanium.

Embodiment 2

[0026] The coating for corrosion resistance and cavitation suppression includes an ultrafast curing agent solution and a modified silicon nanopowder solution, and the ultrafast curing agent solution and the modified silicon nanopowder solution are mixed at a volume ratio of 1:1;

[0027] Wherein, the ultra-fast curing agent solution is polyisocyanate with an NCO% content of 15%; the modified silicon nanopowder solution includes the following components in weight percent: polyoxypropylene diamine 33%, polyether triamine with a molecular weight of 5000 9%, polyphenylene triamine 12%, modified amino silicone resin 15%, modified fluororesin 5%, adhesion promoter 1%, pigment 2% and nanometer powder 23%.

[0028] Further, the adhesion promoter is β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

[0029] Further, the nanopowder is titanium.

Embodiment 3

[0031] The coating for corrosion resistance and cavitation suppression includes an ultrafast curing agent solution and a modified silicon nanopowder solution, and the ultrafast curing agent solution and the modified silicon nanopowder solution are mixed at a volume ratio of 1:1;

[0032] Wherein, the ultra-fast curing agent solution is a polyisocyanate with an NCO% content of 13.5%; the modified silicon nanopowder solution includes the following components in weight percent: 30% polyoxypropylene diamine, polyether triamine with a molecular weight of 5000 8%, polyphenylene triamine 10%, modified amino silicone resin 9%, modified fluororesin 3%, adhesion promoter 1%, pigment 2% and nano powder 35%.

[0033] Further, the adhesion promoter is β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

[0034] Further, the nanopowder is titanium.

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Abstract

Corrosion-resistant cavitation-suppressing coating is disclosed. The coating includes an ultra-fast curing agent solution and a modified silicon nano-powder solution which are mixed in a volume ratioof 1:1-2. The ultra-fast curing agent solution is polyisocyanate. The modified silicon nano-powder solution includes, by weight, 30-33% of polypropylene oxide diamine, 8-10% of polyether triamine having a molecular weight of 5000, 10-15% of polyphenyl triamine, 8-17% of modified amino silicone, 2-11% of modified fluororesin, 1-2% of an adhesion promoter, 1-2% of pigment and 10-35% of nanometer powder. The coating has excellent mechanical properties, abrasion resistance, impact resistance, scratch resistance and stain resistance, and can suppress cavitation to reduce erosion, thereby prolongingthe service lifetime of a portion damaged by erosion.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a coating for corrosion resistance and cavitation suppression. Background technique [0002] Through the liquid flow in the hydraulic mechanical flow channel, if the flow velocity in a certain place increases, the local pressure here will inevitably drop. When the pressure drops to the critical pressure of the liquid flow at that time, the liquid flow in this low-pressure area will begin to vaporize—— Air bubbles, this phenomenon is called cavitation. The cavitation moves to a higher pressure area with the liquid flow. Due to the increase in pressure, the steam in the bubble recondenses into water, and the bubble collapses. When the bubble collapse process occurs on the surface of the solid wall, the material is destroyed, that is, the material erosion caused by cavitation. Erosion occurs with the occurrence and elimination of cavitation, which impacts the surface with great p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D5/16C09D7/61C09D7/63C09D5/10
CPCC08K2003/0881C08K2201/011C09D5/10C09D5/1662C09D5/1687C09D175/02C08K3/08C08K5/5435
Inventor 丁贤雄张欣艺金东圭
Owner 上海沐皿新材料科技有限公司
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