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Method for preparing hydrophobic coating through liquid material thermal spraying

A hydrophobic coating and thermal spraying technology, which is applied to coatings, devices for coating liquid on surfaces, special surfaces, etc., can solve the problems of high cost, many steps and complicated procedures of fluoropolymer coating, and achieve The effect of low equipment cost, broad application prospects and economic benefits, and simple process

Active Publication Date: 2016-04-13
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies of the prior art, to provide a method for preparing a hydrophobic coating by thermal spraying of liquid materials, and to solve the problems of many process steps, complicated procedures and high cost in the processing of fluoropolymer coatings

Method used

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  • Method for preparing hydrophobic coating through liquid material thermal spraying
  • Method for preparing hydrophobic coating through liquid material thermal spraying
  • Method for preparing hydrophobic coating through liquid material thermal spraying

Examples

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Embodiment 1

[0035] In this embodiment, the substrate material is a 1050 aluminum alloy sheet with a thickness of about 2mm, the thickness of the PFA coating on the surface of the substrate is 300 μm, and the coating is well combined with the substrate material; the specific preparation method of the hydrophobic coating is as follows:

[0036]1. Add PFA particles into ethanol solvent, and stir under magnetic stirring conditions to obtain a suspension, the mass percentage of the suspension particles in the solvent is 30%, and the particle diameter of the suspension particles is 30 μm.

[0037] 2. Clean the substrate with acetone, hydrochloric acid, and deionized water in sequence, and use 60-mesh brown corundum sand to roughen the surface of the 1050 aluminum alloy sheet. The air pressure used for sandblasting is 0.5MPa and 0.3MPa respectively, so that Roughness meets spraying requirements;

[0038] 3. If figure 1 As shown, the liquid material flame spraying method is adopted, the prepared...

Embodiment 2

[0043] In this embodiment, the substrate material is a 1060 aluminum alloy sheet with a thickness of about 2mm, the thickness of the PFA coating on the surface of the substrate is 100 μm, and the coating is well combined with the substrate material; the specific preparation method of the hydrophobic coating is as follows:

[0044] 1. Add PFA particles into ethanol solvent, stir under magnetic stirring conditions to obtain a suspension, the mass percentage of the suspension particles in the solvent is 10%, and the particle diameter of the suspension particles is 10 μm.

[0045] 2. Clean the substrate with acetone, hydrochloric acid, and deionized water in sequence, and use 60-mesh brown corundum sand to roughen the surface of the 1060 aluminum alloy sheet. The air pressure used for sandblasting is 0.5MPa and 0.3MPa respectively, so that Roughness meets spraying requirements;

[0046] 3. Adopt the liquid material flame spraying method, use the prepared suspension as the spraying...

Embodiment 3

[0051] In this embodiment, the substrate material is a 1070 aluminum alloy sheet with a thickness of about 2mm, the thickness of the PFA coating on the surface of the substrate is 600 μm, and the coating is well combined with the substrate material; the specific preparation method of the hydrophobic coating is as follows:

[0052] 1. Add PFA particles into ethanol solvent, stir under magnetic stirring conditions to obtain a suspension, the mass percentage of the suspension particles in the solvent is 50%, and the particle diameter of the suspension particles is 80 μm.

[0053] 2. Clean the substrate with acetone, hydrochloric acid, and deionized water in sequence, and use 60-mesh brown corundum sand to roughen the surface of the 1070 aluminum alloy sheet. The air pressure used for sandblasting is 0.5MPa and 0.3MPa respectively, so that Roughness meets spraying requirements;

[0054] 3. Adopt the liquid material flame spraying method, use the prepared suspension as the spraying...

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Abstract

The invention relates to a method for preparing a hydrophobic coating through liquid material thermal spraying. The method includes the following steps that fusible polytetrafluoroethylene particles are added into a solvent, and turbid liquid is obtained; the surface of a matrix is subjected to pretreatment oil removal and roughening; and the turbid liquid is sprayed to the pretreated surface of the matrix through liquid material thermal spraying, and the hydrophobic coating is prepared. The liquid material thermal spraying is liquid material flame spraying or liquid material plasma spraying. The mass percent of the fusible polytetrafluoroethylene particles in the solvent ranges from 10% to 50%, and the particle size of the fusible polytetrafluoroethylene particles ranges from 10 micrometers to 100 micrometers. The method for preparing the hydrophobic coating has the advantages of being simple, low in cost, flexible in process, free of following processing and suitable for industrial production, achieving one-time forming and the like; and the method has wide application prospects and economic benefits in the field of coating preparation.

Description

technical field [0001] The invention relates to the technical field of coating preparation, in particular to a method for preparing a hydrophobic coating by thermal spraying of a liquid material. Background technique [0002] Fluoropolymers are widely used in aviation, aerospace, petroleum, chemical industry, machinery, electronics, etc. Hydrophobic and non-stick coatings in the fields of construction, pesticide, medicine and kitchen materials, etc., the hydrophobic angle of the material itself is 110-120°. Among the numerous fluoropolymer coatings, polytetrafluoroethylene (PTFE), polyfluoroethylene propylene (FEP), and soluble polytetrafluoroethylene (PFA) are widely used and have excellent characteristics. PTFE is a commonly used hydrophobic and non-stick coating material with a melting point of 327°C and can be used for a long time at 260°C. Although FEP has better processability than PTFE, its maximum service temperature is 200°C. PFA and hydrophobic properties are si...

Claims

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Application Information

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IPC IPC(8): B05D5/00B05D3/12
CPCB05D3/12B05D5/00B05D2202/25B05D2350/33B05D2401/10B05D2506/15
Inventor 所新坤黄晶刘奕龚永锋陈秀勇周平李华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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