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One-step preparation process of superhydrophobic functional surface of zinc-based coating

A preparation process, super-hydrophobic technology, applied in the direction of metal material coating process, etc., can solve the problems of complex process, unfavorable environmental protection, poor corrosion resistance, etc., and achieve the effect of simple process, short time consumption and low cost

Active Publication Date: 2020-07-03
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a zinc-based coating with a super-hydrophobic function in view of the poor corrosion resistance of the galvanized layer in harsh environments, and the problems of complex process, high cost, long time-consuming, and unfavorable environmental protection in the current preparation method. One-step surface preparation process

Method used

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  • One-step preparation process of superhydrophobic functional surface of zinc-based coating
  • One-step preparation process of superhydrophobic functional surface of zinc-based coating
  • One-step preparation process of superhydrophobic functional surface of zinc-based coating

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preparation example Construction

[0031] (2) Preparation of superhydrophobic functional surface:

[0032] Dip the clean zinc-based coating substrate into the above-mentioned functionalized surface treatment solution for 10s-60s; then use ethanol-water solution to clean the surface of the treated zinc-based coating substrate to remove residual chemicals, and then air-dry it. That is, the superhydrophobic functionalized surface of the zinc-based coating is obtained.

[0033] The mass concentration ratio of the metal water-soluble salt to the long-chain fatty acid in the fatty acid-salt mixed solution is 1-5:1.

[0034] The long-chain fatty acid is at least one of myristic acid, palmitic acid, and stearic acid, and its concentration range is 0.02mol / L~0.1mol / L; the organic solvent is used to dissolve the long-chain fatty acid, which can be Acetone, toluene, chloroform, ether, carbon tetrachloride, etc., preferably absolute ethanol.

[0035] The metal water-soluble salt is at least one of copper nitrate, copper ...

Embodiment 1

[0041] The one-step preparation process of the superhydrophobic functional surface of the zinc-based coating in this embodiment includes the following steps:

[0042] (1) Preparation of functionalized surface treatment liquid:

[0043] First, add 1.42g of stearic acid to 100ml of absolute ethanol and use a magnetic stirrer to fully stir until completely dissolved to obtain a stearic acid-ethanol solution with a concentration of 0.05mol / L; dissolve 0.17g of silver nitrate in 1-2ml of deionized In water, stir until it is completely dissolved to obtain a silver nitrate solution; then add the silver nitrate solution dropwise to the stearic acid ethanol solution, and apply magnetic stirring at the same time to obtain a stearic acid-silver nitrate mixed solution, using 4% dilute nitric acid Adjust the pH value of the above mixed solution to 4-5 to obtain a functionalized surface treatment solution.

[0044] (2) Preparation of superhydrophobic functional surface:

[0045] Dip 4 cle...

Embodiment 2

[0048] The one-step preparation process of the superhydrophobic functional surface of the zinc-based coating in this embodiment includes the following steps:

[0049] (1) Preparation of surface treatment liquid:

[0050] The long-chain fatty acid selected in this embodiment is myristic acid, and its concentration is 0.05mol / L; The metal water-soluble salt with higher redox potential in this embodiment is silver nitrate, and its concentration is 0.02mol / L; other specific operations Step is with embodiment 1.

[0051] (2) Preparation of superhydrophobic functional surface:

[0052] Dip 4 clean galvanized steel sheets (3cm×5cm×0.3cm) into the above-mentioned functionalized surface treatment solution for 10s, 25s, 40s, and 60s respectively; The surface is cleaned to remove residual chemicals, and then air-dried to obtain a super-hydrophobic functionalized surface. The hydrophobicity of the surface of the galvanized steel sheet was verified by measuring the contact angle. The te...

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Abstract

The invention provides a zinc-based plating layer ultra-hydrophobic functional surface one-step preparation method. According to the zinc-based plating layer ultra-hydrophobic functional surface one-step preparation method, zinc and metal ions are subjected to oxidation reduction reaction, and a long chain aliphatic acid low in surface energy is added at the same time, one-step method is adopted for deposition of micro-nano hierarchical structures on the surface of galvanized steel, and necessary conditions are provided for preparation of ultra-hydrophobic surfaces. The zinc-based plating layer ultra-hydrophobic functional surface one-step preparation method is green, is friendly to the environment, is nontoxic, is low in cost, and is short in time consumption, and technical approach is provided for industrialized applications and large scale preparation of ultra-hydrophobic functionalized surfaces.

Description

technical field [0001] The invention belongs to the technical field of metal substrate surface anticorrosion treatment technology, and in particular relates to a one-step method for preparing a superhydrophobic functional surface of a zinc-based coating. Background technique [0002] The harm caused by metal corrosion is serious and common, and the corrosion of metals or alloys is still the focus of researchers. Galvanizing on the surface of steel is one of the commonly used steel anticorrosion technologies in the world. It can provide both physical barrier protection and sacrificial anode protection for the steel substrate. However, for steel structural parts that have been served in harsh environments such as high temperature and high humidity, industrial atmosphere or marine atmosphere for a long time, it is difficult to provide long-term and effective protection for steel even with galvanized anti-corrosion. [0003] The superhydrophobic surface (contact angle>150°, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/68
CPCC23C22/68
Inventor 李冲冲曹晓明马瑞娜范永哲杜安赵雪
Owner HEBEI UNIV OF TECH