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Preparation method of abrasion-resistant hydrophobic coating

A technology of hydrophobic coating and bottom layer, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., and can solve the problem of poor wear resistance of hydrophobic coating

Active Publication Date: 2018-04-20
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of existing hydrophobic coatings such as poor wear resistance, the invention provides a preparation method for wear-resistant hydrophobic coatings

Method used

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  • Preparation method of abrasion-resistant hydrophobic coating
  • Preparation method of abrasion-resistant hydrophobic coating
  • Preparation method of abrasion-resistant hydrophobic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Use kerosene, alcohol, and acetone to degrease the substrate in turn, and then use No. 46 corundum sand to sandblast and roughen the surface of the aluminum alloy substrate to improve the bonding strength of the coating; first, use atmospheric plasma spraying technology, use AT:PFA =1:3 mixed powder spraying bottom layer, spraying distance 110mm, current 630A, Ar flow rate 45L / min, H 2 The flow rate is 10L / min, the powder feeding rate is 35g / min, and the coating thickness is 90μm; then, supersonic flame spraying is used to spray the surface layer with AT:PFA=3:1 mixed powder, the gasoline flow rate is 13L / min, and the oxygen flow rate is 900L / min , the powder feeding rate is 45g / min, and the coating thickness is 24μm.

Embodiment 2

[0015] Use kerosene, alcohol, and acetone to degrease the substrate in sequence, and then use No. 46 corundum sand to sandblast and roughen the surface of the aluminum alloy substrate; first, use atmospheric plasma spraying technology to spray with AT:PFA=1:3 mixed powder Bottom layer, spraying distance 90mm, current 600A, Ar flow 40L / min, H 2 The flow rate is 8L / min, the powder feeding rate is 20g / min, and the coating thickness is 88μm; then, supersonic flame spraying is used to spray the surface layer with AT:PFA=3:1 mixed powder, the gasoline flow rate is 10L / min, and the oxygen flow rate is 700L / min , powder feeding rate 30g / min, coating thickness 25μm.

Embodiment 3

[0017] Use kerosene, alcohol, and acetone to degrease the substrate in sequence, and then use No. 46 corundum sand to sandblast and roughen the surface of the stainless steel substrate; first, use atmospheric plasma spraying technology to spray the bottom layer with AT:PFA=1:3 mixed powder , spraying distance 120mm, current 650A, Ar flow rate 60L / min, H 2 The flow rate is 12L / min, the powder feeding rate is 35g / min, and the coating thickness is 91μm; then, supersonic flame spraying is used to spray the surface layer with AT:PFA=3:1 mixed powder, the gasoline flow rate is 15L / min, and the oxygen flow rate is 900L / min , the powder feeding rate is 50g / min, and the coating thickness is 27μm.

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Abstract

The invention discloses a preparation method of a hydrophobic coating. The method comprises the steps that a substrate is subjected to unoiling and sand-blasting texturing treatment; an AT-PFA bottomlayer is prepared by adopting an atmospheric plasma spaying method, wherein mixed powder with the proportion of AT to PFA being 1:3 is adopted, the spraying distance is 90-120 mm, the current is 600-650 A, the Ar flow rate is 40-60 L / min, the H2 flow rate is 8-12 L / min, and the powder feeding amount is 20-35 g / min; and then an AT-PFA surface layer is prepared by adopting a high velocity oxy-fuel spraying method, wherein mixed powder with the proportion of AT to PFA being 3:1 is adopted, the gasoline flow rate is 10-15 L / min, the oxygen flow rate is 700-900 L / min, and the powder feeding amountis 30-50 g / min. According to the preparation method, advantages of the AT material and advantages of the PFA material are fully utilized, the coating prepared by fully utilizing advantages of the atmospheric plasma spaying method and the high velocity oxy-fuel spraying method can have both the high abrasion resistance and the high hydrophobicity, the efficiency is high, the cost is low, and industrial production is achieved.

Description

technical field [0001] The invention relates to a method for preparing a functional coating on the surface of a metal substrate. Background technique [0002] The surface self-cleaning effect represented by the lotus leaf, known as the "lotus leaf effect", is caused by the papillae of the micro-nano composite structure on the rough surface and the waxy substance with low surface energy. These self-cleaning surfaces have good hydrophobic properties and strong anti-fouling ability, that is, surface pollutants, such as dust, can be carried away by rolling water droplets without leaving any traces. Self-cleaning coatings have the functions of water saving, energy saving, anti-icing, etc., and are one of the hotspots in material science research at present. [0003] The preparation of hydrophobic surfaces based on the "lotus leaf effect" includes the use of hydrophobic materials to construct surface rough structures and the modification of low surface energy substances on rough ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/04C23C4/129C23C4/134
CPCC23C4/04C23C4/129C23C4/134
Inventor 张小锋周克崧刘敏邓畅光邓春明宋进兵毛杰张吉阜徐丽萍陈志坤曾威
Owner GUANGDONG INST OF NEW MATERIALS
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