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Preparation and evaluation method of hydrophobic performance of a kind of hydrophobic coating

A water coating and coating technology, applied in the field of hydrophobic coating, can solve the problems of only qualitative analysis, unable to meet the working conditions of parts, unsuitable and other problems, and achieve the effect of good application condition, feasible process and reliable quality

Active Publication Date: 2018-11-27
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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Problems solved by technology

[0005] Aiming at the shortcomings in the prior art that the evaluation of the hydrophobic performance of the coating material on the surface of the part can only be qualitatively analyzed, cannot meet the working conditions of the part, and is not suitable for coating on the surface of the part, the technical problem to be solved by the present invention is to provide a Preparation of a hydrophobic coating capable of quantitative evaluation and evaluation method of hydrophobic performance

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  • Preparation and evaluation method of hydrophobic performance of a kind of hydrophobic coating
  • Preparation and evaluation method of hydrophobic performance of a kind of hydrophobic coating
  • Preparation and evaluation method of hydrophobic performance of a kind of hydrophobic coating

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Embodiment Construction

[0039] The present invention will be further elaborated below in conjunction with the accompanying drawings of the description.

[0040] 1. Preparation of hydrophobic coating

[0041] Required materials: FR301B polytetrafluoroethylene concentrated dispersion (produced in Shanghai),

[0042] FR463 polyperfluoroethylene propylene concentrated dispersion (produced in Shanghai),

[0043] Chromic anhydride CrO3, phosphoric acid H 3 PO4, distilled water H 2 o

[0044] Preparation conditions: spraying device with ventilation system, copper mesh (200 mesh)

[0045] Preparation and application of A primer

[0046] Preparation of A1 primer: The primer is prepared by mixing acid solution and FR301B polytetrafluoroethylene concentrated dispersion. The composition of the mixed acid solution is shown in Table 1. The composition of the primer is shown in Table 2.

[0047] The composition of table 1 mixed acid solution

[0048]

[0049] The composition of table 2 primer

[0050] ...

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Abstract

The invention relates to preparation of a hydrophobic coating and an evaluation method for hydrophobicity. The preparation of the hydrophobic coating comprises the following steps: preparation of a priming paint; coating of the priming paint; and coating of a finishing paint. The evaluation method for hydrophobicity of the hydrophobic coating comprises the following steps: measuring the heights of water drops; measuring the diameters of water drops; calculating hydrophobic angles according to the heights and diameters; implementing the above-mentioned three steps on three test pieces, at least three times one each test piece; and taking the arithmetic mean value of results of the at least three times of determination as a final result, wherein hydrophobicity of a prepared hydrophobic coating with a hydrophobic angle of no less than 95 DEG is qualified. According to the invention, the hydrophobic coating is specially used for engine parts and exerts protection and shunting effect on the front parts of engines; components of the hydrophobic coating are designed and a formula for the hydrophobic coating is determined; and a preparation method and hydrophobicity evaluation method are provided for the hydrophobic coating.

Description

technical field [0001] The invention relates to a hydrophobic coating technology, in particular to a method for preparing a hydrophobic coating and evaluating its hydrophobic performance. Background technique [0002] Hydrophobic coatings are applied to parts of aero-engines under corresponding working conditions to protect and divert flow. Hydrophobic agents developed and produced in the prior art also belong to this type of material, which can be used below 200°C, and the parts need complex pretreatment. deal with. [0003] At present, the evaluation of the hydrophobic performance of the existing water-repellent agent is only qualitatively determined by whether it is hydrophilic or not, rather than quantitative analysis, but the qualitative analysis and evaluation method cannot meet the working conditions and hydrophobicity of parts with hydrophobic coatings. Coating technical index requirements and evaluation of the hydrophobicity of the hydrophobic coating of the presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/00G01N1/28
CPCG01N1/28G01N13/00
Inventor 王杰史艳梅刘翔徐琪邢彬
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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