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Preparation method of copper-based super-hydrophobic corrosion and scale preventing film for chloride ion corrosion and calcium carbonate scale

A technology for chloride ion corrosion and calcium carbonate scaling, which is applied to devices for coating liquid on surfaces, pretreatment surfaces, coatings, etc. It can solve complex processes, expensive equipment or hydrophobic agents, and no functional requirements for corrosion resistance. and other problems, to achieve the effect of simple preparation equipment, favorable for popularization and application, good corrosion resistance and anti-scaling properties

Inactive Publication Date: 2016-08-24
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the previous studies on the construction of hydrophobic films on copper surfaces, some of the rough structures were etched by etching liquid chemical methods, and some were etched by physical methods, but there is no combination of physical and chemical methods in the current research. Etching method
Moreover, some of the above-mentioned methods are complex in process, and some equipment or hydrophobic agents are expensive, and the purpose of development and research is often to study the corrosion resistance of the copper surface after hydrophobization, and there is no research on its ability to inhibit carbonic acid while having corrosion resistance. The functional requirements of calcium fouling have certain limitations in the promotion and application of coatings.

Method used

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  • Preparation method of copper-based super-hydrophobic corrosion and scale preventing film for chloride ion corrosion and calcium carbonate scale
  • Preparation method of copper-based super-hydrophobic corrosion and scale preventing film for chloride ion corrosion and calcium carbonate scale
  • Preparation method of copper-based super-hydrophobic corrosion and scale preventing film for chloride ion corrosion and calcium carbonate scale

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preparation example Construction

[0054] The preparation method of the copper-based super-hydrophobic anti-corrosion anti-scaling film for chloride ion corrosion and calcium carbonate scale of the present invention, it comprises the following steps:

[0055] (1) The copper sheet is polished and pretreated by ultrasonic cleaning to remove oxides and other dirt on the surface of the copper sheet, and make the surface of the copper sheet smooth;

[0056] (2) putting the pretreated copper sheet into concentrated ammonia water with a mass percentage concentration of 25%-28% for ultrasonic-assisted etching for 0.5-1 hour, and then calcining to form a uniform roughness on the surface of the copper sheet;

[0057] (3) Soak the copper sheet with uniform roughness in ethanol solution of octadecanoic acid with a temperature of 25°C-55°C and a concentration of 0.01mol / L-0.05mol / L for 4-6 days, then take it out and put it in Heat treatment in an oven to form a super-hydrophobic surface on the surface of the copper sheet. ...

Embodiment 1

[0065] Roughly polish the 2.5cm×3cm×0.5cm copper sheet with a coarse grinding wheel to remove surface oxides and other dirt, then apply green polishing paste, and use a wool wheel for fine polishing to make the surface smooth and mirror-like. Then use detergent, ethanol, and distilled water to perform ultrasonic cleaning for 10 minutes, and then air dry naturally.

[0066] Put the polished and cleaned pretreated copper sheet into 28% concentrated ammonia water for ultrasonic etching for 60 minutes, and then calcined at 200° C. for 60 minutes to form primary roughness.

[0067] Rinse the copper sheet with primary roughness with distilled water and then immerse it in 0.01mol / L ethanol solution of octadecanoic acid for immersion reaction. The immersion time is 6 days and the immersion temperature is room temperature 25°C.

[0068] After the immersion reaction, the samples were taken out and put into an oven for heat treatment at 80°C for 2 hours.

Embodiment 2

[0070] Roughly polish the 2.5cm×3cm×0.5cm copper sheet with a coarse grinding wheel to remove surface oxides and other dirt, then apply green polishing paste, and use a wool wheel for fine polishing to make the surface smooth and mirror-like. Then use detergent, ethanol, and distilled water to perform ultrasonic cleaning for 10 minutes, and then air dry naturally.

[0071] Put the polished and cleaned pretreated copper sheet into 27% concentrated ammonia water for ultrasonic etching for 60 minutes, and calcined at 350° C. for 30 minutes to form primary roughness.

[0072] Rinse the copper sheet with primary roughness with distilled water and then immerse it in 0.02mol / L ethanol solution of octadecanoic acid for immersion reaction. The immersion time is 5 days and the immersion temperature is 45°C.

[0073] After the immersion reaction, the samples were taken out and put into an oven for heat treatment at 80°C for 1 hour.

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Abstract

The invention discloses a preparation method of a copper-based super-hydrophobic corrosion and scale preventing film for chloride ion corrosion and calcium carbonate scale. The preparation method comprises the following steps: (1) polishing a copper sheet, carrying out ultrasonic cleaning pretreatment to remove oxides and other dirt on the surface of the copper sheet, and leveling the surface of the copper sheet; (2) putting the pretreated copper sheet into stronger ammonia water to carry out ultrasonic assisted etching, and then calcining to form uniform roughness on a surface layer of the copper sheet; (3) immersing the copper sheet formed with uniform roughness into an ethanol solution of octadecanoic acid to be soaked, then taking out and placing into an oven to carry out heat treatment, and thus forming a super-hydrophobic surface on the surface of the copper sheet. With the adoption of the preparation method disclosed by the invention, the etching time is shorter, the etching is more high-efficient, the uniformity of an emitting surface is enhanced, the price of a selected hydrophobic agent is cheap, and preparation equipment is simple.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a method for preparing a copper-based super-hydrophobic anti-corrosion and anti-scaling film for chloride ion corrosion and calcium carbonate scale. The copper-based super-hydrophobic film can be used for corrosion ions mainly containing chloride , the scale is mainly seawater or geothermal water with calcium carbonate scale. Background technique [0002] Superhydrophobic surfaces on metal substrates have attracted extensive attention in research fields such as anti-fouling, anti-corrosion, self-cleaning, and drag reduction, and have great industrial application prospects. In the chemical production process, reboilers, evaporators and steam boilers are commonly used heat exchange equipment. The commonly used materials for these equipment are stainless steel, carbon steel, copper and copper alloys and titanium, among which pure copper and copper alloys The thermal condu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/08B05D3/10
CPCB05D5/08B05D3/102B05D2202/45B05D2350/35
Inventor 刘明言吕燕
Owner TIANJIN UNIV
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