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Antibacterial and anti-corrosion capsaicine composite ZnO/Zn coating layer as well as preparation and application thereof

A composite coating, capsaicin technology, applied in coatings, electrolytic coatings, etc., can solve problems such as environmental pollution, microbial corrosion and biofouling, and achieve enhanced corrosion resistance and antibacterial activity, environmentally friendly anti-biofouling, environmental protection. Friendly and resistant to microbial corrosion

Active Publication Date: 2019-01-08
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the microbial corrosion and biofouling problems encountered in the steel protection of the above-mentioned zinc coatings and the environmental pollution problems of the current technology, the purpose of the present invention is to provide an antibacterial and corrosion-resistant capsaicin composite ZnO / Zn coating and its preparation and application

Method used

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  • Antibacterial and anti-corrosion capsaicine composite ZnO/Zn coating layer as well as preparation and application thereof
  • Antibacterial and anti-corrosion capsaicine composite ZnO/Zn coating layer as well as preparation and application thereof
  • Antibacterial and anti-corrosion capsaicine composite ZnO/Zn coating layer as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of capsaicin composite ZnO / Zn electroplating layer:

[0028] 1) Preparation of alkaline zinc plating solution system: 16g / L NaOH, 2.0g / L ZnO, dissolved in distilled water, and used for JBlank.

[0029] Then add 0.2g / L, 0.6g / L and 1.0g / L capsaicin to JBlank respectively, stir for half an hour and let it stand, respectively as JC1, JC2 and JC3.

[0030] 2) Using 20# standard carbon steel sheet as the base material, polish each surface of the test piece with 80#, 400#, 1000#, 2000# sandpaper water-phase sandpaper, put it in absolute ethanol and ultrasonically for 10 minutes to remove the oil on the surface, Then immerse the bare part of the test piece in 1mol / L HCl for 5s to activate its surface, and set it aside.

[0031] 3) Use the DJS-292E potentiostat, adjust to the constant current mode, connect the steel to be protected in step 2) to the negative pole of the DC power supply, and connect the positive pole of the DC power supply with a pure zinc sheet of t...

Embodiment 2

[0035] Evaluation of microbial corrosion resistance of capsaicin composite ZnO / Zn electroplating coating:

[0036] Prepare the sulfate plating solution system JBlank and JC1, JC2 and JC3 according to the steps in Example 1, at 15mA cm -2 Constant current deposition under the current density for 20min, the obtained composite zinc coatings are BB, BC1, BC2 and BC3, and the electroplating layer is subsequently processed according to the step (4) in Example 1. Subsequently, the prepared BB, BC1, BC2 and BC3 coatings were immersed in typical marine corrosion microbial sulfate reducing bacteria (SRB, Desulfovibriocaledoniensis) for 14 days, and the Tafel curve was used to evaluate the corrosion resistance of BB, BC1, BC2 and BC3 coatings (Such as figure 2 shown). It can be seen from the polarization curve that as the concentration of capsaicin increases, the self-corrosion potential of the coating shifts positively, indicating that its corrosion sensitivity decreases; however, th...

Embodiment 3

[0038] Antibacterial performance evaluation of capsaicin composite ZnO / Zn electroplating layer:

[0039] Prepare the sulfate plating solution system JBlank and JC1, JC2 and JC3 according to the steps in Example 1, at 25mA cm -2Constant current deposition under the current density for 20min, the obtained composite zinc coatings are CB, CC1, CC2 and CC3, and the electroplating layer is subsequently processed according to the step (4) in Example 1. Subsequently, the prepared CB, CC1, CC2 and CC3 electroplating layers were immersed in 10 7 Soak in cfu / mL E.coliPBS suspension for 24h. After taking it out, add a mixed staining agent (a mixture of 4 mg / L ethidium bromide and 4 mg / L acridine orange), stain at 30°C in the dark for 30 min, and observe with an Olympus fluorescence microscope at 200 times. The bright spot in the figure is the bacteria attached to the surface of the coating. It can be seen from the figure that a large number of live bacteria are attached to the surface o...

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Abstract

The invention belongs to the field of compound metal coating layers, and particularly relates to preparation and application of an antibacterial and anti-corrosion capsaicine composite ZnO / Zn coatinglayer. The antibacterial and anti-corrosion capsaicine composite ZnO / Zn coating layer is obtained by compounding capsaicine with alkaline deposited liquid under a constant-current depositing conditionto obtain a zinc array having pores in the surface, then drying the zinc array under a nitrogen environment to allow the surface of the zinc array to naturally form a ZnO nano needle in air, and obtaining the product. The needle-like ZnO can be formed on the surface of the capsaicine composite ZnO / Zn coating layer disclosed by the invention, so the capsaicine composite ZnO / Zn coating layer is high in antibacterial and anti-corrosion property; and the capsaicine composite ZnO / Zn coating layer is suitable for protecting a steel structure in a biological activity-polluted water environment or marine environment, and has a good staining protection application value.

Description

technical field [0001] The invention belongs to the field of electrochemical coatings, and in particular relates to an antibacterial and corrosion-resistant capsaicin composite ZnO / Zn coating and its preparation and application. Background technique [0002] The marine environment is a complex corrosive environment. Not only seawater itself is a strong electrolyte, but also its very high biological activity seriously endangers human marine activities. There are a large number of man-made steel facilities in the marine environment. Many key parts such as ship propellers and submarine steel cables are often protected by metal coatings due to their special service environments. Zinc-based coatings have negative self-corrosion potential and barrier effects Good and widely used. However, although zinc-based coatings provide good protection against chemical and electrochemical corrosion, they are still subject to microbial corrosion and biofouling. [0003] Studies have shown th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22C25D15/00
CPCC25D3/22C25D15/00
Inventor 翟晓凡王传兴管方王楠鞠鹏段继周郑萌侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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