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Super-hydrophobic stainless steel surface coating and preparation method thereof

A surface coating and stainless steel technology, which is applied in the field of superhydrophobic stainless steel surface coating and its preparation, can solve the problems of unfriendly environment, high price, complicated process, etc., and achieve the simple and easy operation of the preparation method, the simple preparation method, and the reduction of process The effect of the process

Active Publication Date: 2017-06-13
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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  • Super-hydrophobic stainless steel surface coating and preparation method thereof
  • Super-hydrophobic stainless steel surface coating and preparation method thereof
  • Super-hydrophobic stainless steel surface coating and preparation method thereof

Examples

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preparation example Construction

[0043] Second aspect, the present invention provides a kind of preparation method of superhydrophobic stainless steel surface coating, comprising:

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

[0045] (2) soak the pretreated stainless steel material as the cathode in the electrodeposition solution containing nickel salt and / or copper salt, use the nickel plate or platinum plate as the anode, and conduct the first electrodeposition on the surface of the stainless steel material, the first 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) Electrodeposition is carried out for the second time on the stainless steel material surface that step (2) obtains, and the temperature of electrodeposition for the second time is 40-80 ℃, and the current density of electrodeposition for the second time is higher than the current density of electro...

Embodiment 1

[0080] A method for preparing a superhydrophobic stainless steel surface coating, comprising:

[0081] (1) Provide 316L stainless steel as the base material, and use 800#, 1000#, and 2000# water-grinding sandpaper to polish the surface of the 316L stainless steel material in turn. After polishing, clean it with distilled water and ethanol, and then use acetone and ethanol to ultrasonically clean the 316L stainless steel respectively. 20min. Adopt alkaline degreasing agent to carry out degreasing treatment to stainless steel, alkaline degreasing agent comprises concentration and is 10g / L sodium hydroxide, 20g / L sodium carbonate, 10g / L sodium phosphate and 5g / L alkyl polyoxyethylene ether, The oil removal temperature is 70°C, and the oil removal time is 20 minutes. Then use pickling activation solution to carry out pickling activation treatment. The pickling activation solution includes 5mL / L hydrochloric acid (35%), 5mL / L acetic acid (99.3%) and 5mL / L phosphoric acid (85.0%). ...

Embodiment 2

[0087]A method for preparing a superhydrophobic stainless steel surface coating, comprising:

[0088] (1) Provide 316L stainless steel as the base material, and use 800#, 1000#, and 2000# water-grinding sandpaper to polish the surface of the stainless steel material in turn. After polishing, clean it with distilled water and ethanol, and then use acetone and ethanol to ultrasonically clean the 316L stainless steel for 20 minutes. . Adopt alkaline degreasing agent to carry out degreasing treatment to stainless steel, alkaline degreasing agent includes concentration and is 40g / L sodium hydroxide, 50g / L sodium carbonate, 30g / L sodium phosphate and 10g / L alkyl polyoxyethylene ether, The degreasing temperature is 90°C, and the degreasing time is 5 minutes. Then use pickling activation solution to carry out pickling activation treatment. The pickling activation solution includes 20mL / L hydrochloric acid (35%), 10mL / L acetic acid (99.3%) and 10mL / L phosphoric acid (85.0%). Wash and...

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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 superhydrophobic materials, in particular to a superhydrophobic 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 marine engineering equipment materials, but this material appears in the high-temperature and high-humidity South China Sea marine environment. The serious corrosion failure was mainly due to the more active marine microbial fouling activities under high humidity and high heat conditions, which accelerated the pitting corrosion of 316L stainless steel. [0003] At present, the anti-corrosion and anti-fouling of metal materials in marine engineering equipment mainly adopts the method of coating. Traditional anti-corrosion and anti-fouling...

Claims

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Application Information

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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
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