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A kind of superhydrophobic stainless steel surface coating and preparation method thereof

A surface coating and stainless steel technology, applied in the field of superhydrophobic stainless steel surface coating and its preparation, can solve the problems of unfriendly environment, expensive equipment, complicated process, etc., and achieve simple and easy preparation method, simple preparation method, and reduced process The effect of the process

Active Publication Date: 2019-06-14
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method has the disadvantages of expensive preparation equipment, complex process, expensive low surface energy substance fluorosilane modification, high cost, and unfriendly environment.

Method used

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  • A kind of superhydrophobic stainless steel surface coating and preparation method thereof
  • A kind of superhydrophobic stainless steel surface coating and preparation method thereof
  • A kind of superhydrophobic stainless steel surface coating and preparation method thereof

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preparation example Construction

[0043] In a second aspect, the present invention provides a method for preparing a superhydrophobic stainless steel surface coating, comprising:

[0044] (1) Provide stainless steel materials and pretreat stainless steel materials;

[0045] (2) The pretreated stainless steel material is immersed in the electrodeposition solution containing nickel salt and / or copper salt as the cathode, and the nickel plate or the platinum plate is used as the anode for the first electrodeposition on the surface of the stainless steel material. The temperature of secondary electrodeposition is 40-80℃, and the current density is 0.1-5A / dm 2 , the electrodeposition time is 50-1000s;

[0046] (3) a second electrodeposition is performed on the surface of the stainless steel material obtained in step (2), the temperature of the second electrodeposition is 40-80° C., and the current density of the second electrodeposition is higher than that of the first electrodeposition. Large 7-9A / dm 2 , the se...

Embodiment 1

[0080] A preparation method of a superhydrophobic stainless steel surface coating, comprising:

[0081] (1) Provide 316L stainless steel as the base material, use 800#, 1000#, 2000# water abrasive paper to polish the surface of the 316L stainless steel material in turn, wash with distilled water and ethanol respectively after grinding, and then use acetone and ethanol to ultrasonically clean the 316L stainless steel respectively 20min. The stainless steel is degreased with an alkaline degreaser. The alkaline degreaser includes 10g / L sodium hydroxide, 20g / L sodium carbonate, 10g / L sodium phosphate and 5g / L alkyl polyoxyethylene ether. The degreasing temperature is 70℃, and the degreasing time is 20min. Then, the acid washing activation solution is used for the acid washing activation treatment. The acid washing activation solution includes 5 mL / L hydrochloric acid (35%), 5 mL / L acetic acid (99.3%) and 5 mL / L phosphoric acid (85.0%). The washing activation time was 6 min, then...

Embodiment 2

[0087]A preparation method of a superhydrophobic stainless steel surface coating, comprising:

[0088] (1) Provide 316L stainless steel as the base material, use 800#, 1000#, 2000# water abrasive paper to polish the surface of the stainless steel material in turn, wash with distilled water and ethanol respectively after grinding, and then ultrasonically clean the 316L stainless steel with acetone and ethanol for 20min respectively . Use alkaline degreaser to remove oil from stainless steel. The alkaline degreaser includes 40g / L sodium hydroxide, 50g / L sodium carbonate, 30g / L sodium phosphate and 10g / L alkyl polyoxyethylene ether. The degreasing temperature was 90°C, and the degreasing time was 5 min. Then, the acid washing activation solution is used for the acid washing activation treatment. The acid washing activation solution includes 20 mL / L hydrochloric acid (35%), 10 mL / L acetic acid (99.3%) and 10 mL / L phosphoric acid (85.0%). The washing and activation time was 1 min...

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Abstract

The invention provides a super-hydrophobic stainless steel surface coating which comprises micro-nano structures arranged in arrays, wherein each micro-nano structure comprises a micon-sized pointed cone and a nano-sized whisker, and the nano-sized whisker radiates out by taking the micon-sized pointed cone as a center to form a petal type structure; the micro-nano structures are made of at least one of nickel, copper and nickel-copper alloy. The super-hydrophobic stainless steel surface coating can effectively block erosion and adhesion of a corrosive medium, bacteria and protein, thereby realizing corrosion resistance and an antifouling property. The invention further provides the method for preparing the super-hydrophobic stainless steel surface coating. The method comprises the step: directly deposing the super-hydrophobic stainless steel surface coating on the surface of a stainless steel material by a directional electrodeposition method. The method does not need a template, is not limited by the shape of the stainless steel material, and does not modification by an organic low surface energy material, thereby reducing the cost and reducing the technological process. Moreover, the growth and size of deposit sediments can be controlled.

Description

technical field [0001] The invention relates to the field of super-hydrophobic materials, in particular to a super-hydrophobic stainless steel surface coating and a preparation method thereof. Background technique [0002] my country's research in the field of seawater corrosion-resistant steel started late, and the establishment of the marine material system is not perfect. The traditional material 316L stainless steel is still widely used as a marine engineering equipment material, but this material appears in the high temperature and high humidity of the South China Sea marine environment. The main reason is that the more active marine microbial fouling activities under high humidity and high heat conditions accelerate the pitting corrosion of 316L stainless steel. [0003] At present, the anti-corrosion and anti-fouling method of metal materials of marine engineering equipment mainly adopts the method of coating. Traditional anti-corrosion and anti-fouling coatings mainl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/10C25D5/12C25D5/14C25D3/12C25D3/38C25D5/36
CPCC25D3/12C25D3/38C25D5/10C25D5/12C25D5/14C25D5/36
Inventor 赵颖蒋斌曾利兰梁涛
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI