Rust remover and use method thereof

A technology of rust remover and additive, applied in the field of rust remover, can solve problems such as environmental pollution, and achieve the effect of reducing pollution and avoiding three wastes

Pending Publication Date: 2022-03-29
HUBEI ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of chemical rust removal will consume sulfuric acid continuously, but the production process and discharge of sulfuric acid will still cause environmental pollution problems, for example: the industrial production of sulfuric acid will produce three wastes such as tail gas, waste water, and waste residue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Bactericide:

[0051] Microorganism: Thiobacillus thiooxidans

[0052] Microbial culture medium: (NH 4 ) 2 SO 4 3g / L, KCl 0.1g / L, KH 2 PO 4 3.5g / L, MgSO 4 ·7H 2 O0.5g / L, CaCl 2 2H 2 O 0.33g / L and FeSO 4 ·7H 2 O 0.018g / L, pH2.0

[0053] Additives: hydroxyethylidene diphosphonic acid, disodium hydroxyethylidene diphosphonate, dodecylbenzenesulfonic acid, crape myrtle leaf extract, lilac flower extract, lavender oil

[0054] Instructions:

[0055] (1) The microorganisms were 8.5×10 5 The concentration of each / mL was inoculated in the microbial culture solution. After culturing at 25°C for 24 hours, the color of the bacterial solution turned yellow. After testing, the concentration of Thiobacillus thiooxidans was 8.5×10 6 cells / mL, and the sulfuric acid content is 15%, stop the cultivation; add the additive to the above bacterial liquid at a concentration of 10g / L, mix well, and set aside.

[0056] (2) Soak the metal components in the above bacterial solutio...

Embodiment 2

[0059] Bactericide:

[0060] Microorganism: Thiobacillus thiooxidans

[0061] Microbial culture medium: (NH 4 ) 2 SO 4 2g / L, KCl 0.01g / L, KH 2 PO 4 3g / L, MgSO 4 ·7H 2 O0.1g / L, CaCl 2 2H 2 O 0.2g / L and FeSO 4 ·7H 2 O 0.01g / L, pH6.0

[0062] Additives: organic phosphoric acid, lavender oil

[0063] Instructions:

[0064] (1) The microorganisms were 8.5×10 5 The concentration of each / mL was inoculated in the microbial culture solution. After culturing at 25°C for 24 hours, the color of the bacterial solution turned yellow. After testing, the concentration of Thiobacillus thiooxidans was 8.8×10 6 cells / mL, and the sulfuric acid content is 15.7%, stop the cultivation; add the additive to the above bacterial liquid at a concentration of 5g / L, mix well, and set aside.

[0065] (2) Soak the metal component in the above bacterial solution to perform derusting treatment, and the temperature of derusting treatment is 20°C.

[0066] (3) After about 9 minutes, take out th...

Embodiment 3

[0068] Bactericide:

[0069] Microorganism: Thiobacillus thiooxidans

[0070] Microbial culture medium: (NH 4 ) 2 SO 4 4g / L, KCl 0.15g / L, KH 2 PO 4 4g / L, MgSO 4 ·7H 2 O 1g / L, CaCl 2 2H 2 O 0.4g / L and FeSO 4 ·7H 2 O 0.03g / L, pH2.0

[0071] Additives: organic phosphoric acid and dodecylbenzenesulfonic acid

[0072] Instructions:

[0073] (1) The microorganisms were 8.5×10 5 The concentration of each / mL was inoculated in the microbial culture solution. After culturing at 25°C for 20 hours, the color of the bacterial solution turned yellow. After testing, the concentration of Thiobacillus thiooxidans was 1.1×10 6 cells / mL, and the sulfuric acid content is 10.2%, stop the cultivation; add the additive to the above bacterial liquid at a concentration of 10g / L, mix well, and set aside.

[0074] (2) Soak the metal member in the above bacterial solution to perform derusting treatment, and the temperature of the derusting treatment is 40°C.

[0075] (3) After about 9 m...

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PUM

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Abstract

The invention discloses a rust remover and a use method thereof. The rust remover comprises (a) metabolites of microorganisms; or (b) a microorganism and a microorganism culture solution; wherein the microorganisms comprise thiobacillus thiooxidans and / or acidithiobacillus caldus. According to the scheme, the metabolite produced by culturing the microorganisms in the microorganism culture solution contains sulfuric acid, the sulfuric acid can react with the metal oxide and the corrosion layer, so that the metal oxide and the corrosion layer generate ions to be dissolved, and compared with direct use of the sulfuric acid, three wastes produced by mass production of the sulfuric acid are avoided; therefore, the pollution to the environment and the danger of storage and transportation of sulfuric acid are reduced.

Description

technical field [0001] The invention relates to the technical field of metal processing and production, in particular to a rust remover and its application method. Background technique [0002] Metal components are indispensable in my country's modern infrastructure, but during use, metal components need to be exposed to the air for a long time, which is prone to rust problems that affect their use. [0003] In the chemical rust removal method, acid, complexing agent and metal oxide are used to chemically react to dissolve the rust on the surface to achieve the purpose of rust removal. This type of method has no requirements on the shape of the steel, and can handle steel profiles of any shape. Since the contact area between the metal surface and the solution can be very large, it can simultaneously perform derusting treatment on different positions of the metal surface. [0004] However, the traditional chemical rust removal is carried out under strong acid. The early use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08C23G1/06C12N1/20C12R1/01
CPCC23G1/081C23G1/066C12N1/20
Inventor 郑美娥马飞
Owner HUBEI ENG UNIV
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