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Method for preparing surface hydrophobic structural coating layer

A coating and hydrophobic technology, applied in the field of hydrophobic coating preparation, can solve the problems of complicated process and high cost, and achieve the effect of facilitating industrialization and realizing coating stability.

Active Publication Date: 2018-07-20
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these hydrophobic surface preparation methods may require special substrates, or the process is cumbersome and complicated, or require high temperature, high pressure and other equipment, which is expensive. Therefore, simple raw materials, low-cost equipment and simple operation processes are used to prepare on stainless steel substrates. Hydrophobic surfaces are a pressing need

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The steel parts are first placed in NaOH and HCl solutions for ultrasonic cleaning, then placed in a 0.025g / ml low-concentration NaCl salt solution for constant pressure 9V electrolysis for 45 minutes, and then placed in a fatty amine solution with a concentration of 0.008g / ml for 15 minutes, so Circulate 3 times; then put into electroplating solution (sodium chloride: 240g / L, zinc chloride: 60g / L, boric acid: 32g / L, brightener: A agent 1ml / L, B agent 20ml / L) constant flow 0.1 A is electroplated for 60 minutes, then placed in a 5% stearic acid / absolute ethanol solution for 16 hours, and finally placed in a tube furnace for low temperature tempering at 200°C (heating 2°C / min, holding time 60min), and cooling with the furnace to prepare Coating with hydrophobic structure.

Embodiment 2

[0024] The steel parts are first placed in NaOH and HCl solutions for ultrasonic cleaning, and then placed in a 0.010g / ml low-concentration NaCl salt solution for constant pressure 9V electrolysis for 45 minutes, and then placed in a fatty amine solution with a concentration of 0.008g / ml for 15 minutes. Circulate 3 times; then put in electroplating solution (sodium chloride: 240g / L, zinc chloride: 60g / L, boric acid: 32g / L, brightener: A agent 1ml / L, B agent 20ml / L) constant flow 0.15 A is electroplated for 60 minutes, then placed in a 7% stearic acid / absolute ethanol solution for 16 hours, and finally placed in a tubular furnace for low temperature tempering at 180°C (heating 2°C / min, holding time 60min), and cooling with the furnace to prepare Coating with hydrophobic structure.

Embodiment 3

[0026] The steel parts are first placed in NaOH and HCl solutions for ultrasonic cleaning, then placed in 0.015g / ml low concentration NaCl salt solution for constant pressure 9V electrolysis for 45 minutes, and then placed in a fatty amine solution with a concentration of 0.007g / ml for 15 minutes, so Circulate 3 times; then put into electroplating solution (sodium chloride: 240g / L, zinc chloride: 60g / L, boric acid: 32g / L, brightener: A agent 1ml / L, B agent 20ml / L) constant current 0.2 A is electroplated for 60 minutes, then placed in a 10% stearic acid / absolute ethanol solution for 16 hours, and finally placed in a tube furnace for low temperature tempering at 150°C (heating 2°C / min, holding time 60min), and cooling with the furnace to prepare Coating with hydrophobic structure.

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PUM

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Abstract

The invention discloses a method for preparing surface hydrophobic structural coating layers, belongs to the field of hydrophobic coating layer preparation, and in particular, relates to a method forelectrochemically etching steel part basal bodies and coating zinc oxide to form hydrophobic micron / nanometer structural coating layers. The method comprises the following specific steps: steel partsare firstly washed by alkali and acid, then, are put in low-concentration salt solution for constant-pressure electrolysis, in electroplating liquid for zinc electroplating and in stearic acid solution for dipping, and finally, are tempered at low temperature. The hydrophobic coating layers prepared by the method overcome high cost caused by selection of specific basal body materials, technical risks caused by rigid process condition requirements and dangers and pollutions caused by application of poisonous and harmful chemical reagents; the surface dewatering of the coating layers and the stability and the practicability of the coating layers are met; and industrial large-batch production is convenient.

Description

Technical field [0001] The invention belongs to the field of hydrophobic coating preparation, and specifically relates to a method for etching a steel substrate by an electrochemical method and coating zinc oxide to form a hydrophobic micro / nano structure coating. Background technique [0002] Based on the inspiration of the hydrophobic surface and structure of animals and plants in nature, people can construct the bionic structure to realize the preparation of the hydrophobic surface to solve the problems in real life. At present, the preparation of hydrophobic surfaces mainly adopts vapor deposition method, etching method, electrochemical method, solution immersion method, hydrothermal method, spray method, etc. However, these hydrophobic surface preparation methods require special substrates, or the process is cumbersome and complicated, or require high temperature, high pressure and other equipment, which is expensive. Therefore, simple raw materials, low-cost equipment and s...

Claims

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Application Information

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IPC IPC(8): C25D3/22C25F3/06C25D5/36C25D5/48C25D5/50
CPCC25D3/22C25D5/36C25D5/48C25D5/50C25F3/06
Inventor 林涛芦海洋邵慧萍何新波李飞宏李文媛
Owner UNIV OF SCI & TECH BEIJING