Biological corrosion inhibitor to inhibit corrosion of metal materials for seawater environment and anti-corrosion method

A technology of metal materials and corrosion inhibitors, which is applied in the field of environmental engineering, can solve problems such as the preparation of corrosion inhibitors, and achieve the effects of reducing corrosion rate and pitting corrosion incidence, inhibiting corrosion, and being easy to use

Inactive Publication Date: 2018-11-06
SHANGHAI MARITIME UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although studies have found that some bacteria have the ability to form inorganic salts, there is no report on the use of such bacteria to prepare corrosion inhibitors and apply them in the field of corrosion protection by forming organic-inorganic films on metal surfaces

Method used

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  • Biological corrosion inhibitor to inhibit corrosion of metal materials for seawater environment and anti-corrosion method
  • Biological corrosion inhibitor to inhibit corrosion of metal materials for seawater environment and anti-corrosion method
  • Biological corrosion inhibitor to inhibit corrosion of metal materials for seawater environment and anti-corrosion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation of embodiment 1 biological corrosion inhibitor

[0039] Take the strains stored at -80°C, place them at room temperature for recovery, take 100 μl and inoculate them in 2216E medium, culture them at 30°C with shaking at 120r / min for 12 hours to obtain the bacterial liquid, and dilute the bacterial liquid to 10 8 CFU / ml, add 500μl per liter of seawater.

Embodiment 2

[0040] The live bacteria concentration detection of embodiment 2 biological corrosion inhibitors

[0041]Take 1ml of the seawater prepared in Example 1 for dilution, take 100 μl of the diluted seawater and spread it on a petri dish, cultivate it at 37°C for 24 hours, count the number of colonies, and obtain the concentration of bacteria in the seawater of Example 1 as 50000 CFU / ml.

Embodiment 3

[0042] Embodiment 3 is measured to the corrosion inhibition performance of carbon steel

[0043] Carbon steel is used as the metal material. Cut the metal sample into a square of 10mm×10mm, weld the copper wire on the back, encapsulate it with epoxy resin, and keep only one working surface. The working surface was polished step by step with silicon carbide sandpaper to 800 mesh sandpaper, ultrasonically cleaned in anhydrous ethanol, and then sterilized by irradiation with ultraviolet light for 30 minutes.

[0044] A control group and an experimental group were set up, with 12 metal samples in each group.

[0045] Samples of the experimental group: place the metal sample in a Erlenmeyer flask filled with sterile seawater, and insert a corrosion inhibitor so that the concentration of viable bacteria in the seawater system containing bacteria is 50,000 CFU / ml; place the flask on a constant temperature shaker at a temperature of 37°C , the speed is 120rpm / min, and the pH value i...

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Abstract

The invention relates to a biological corrosion inhibitor to inhibit corrosion of metal materials for the seawater environment and a protection method. The biological corrosion inhibitor contains pseudoalteromonaslipolytica which is harmless to human bodies and can form a stable organic-inorganic composite film with calcite structure on the surface of a metal material to significantly improve uniform corrosion resistance and pitting corrosion resistance of the metal material, and the film has self-reparation performance after formation. The operation is simple, dosage is little, and poison andpollution are avoided; requirements to shape and size of the processed metal material are not needed, traditional pollution-carrying surface treatment methods and corrosion inhibitors can be replaced, the metal corrosion protection cost and maintenance cost are greatly reduced, and metal structural material efficient environmentally friendly protection is achieved.

Description

Technical field: [0001] The invention belongs to the field of environmental engineering, and in particular relates to a biological corrosion inhibitor used for inhibiting corrosion of metal materials in a seawater environment and a method for inhibiting metal corrosion by using the biological corrosion inhibitor. Background technique: [0002] Metal materials used in marine environments are facing serious corrosion problems. In order to ensure their safety during service, it is necessary to develop long-term and effective anti-corrosion methods. Among many anti-corrosion technologies, organic coatings can better protect metal material substrates through passivation and resistance to corrosion media (Suleiman et al, Surface and Coatings Technology, 2017, 324:526-535). However, the weather resistance and environmental friendliness of these organic coatings have always been a problem (Mousaa et al, Progress in Organic Coatings, 2017, 111:220‐230; Thirumoolan et al, Progress in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F15/00
CPCC23F15/00
Inventor 刘涛王晓雪郭章伟郭娜曾振顺
Owner SHANGHAI MARITIME UNIVERSITY
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