CN113308658A - Steel plate with double-plating coating on surface - Google Patents
Steel plate with double-plating coating on surface Download PDFInfo
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- CN113308658A CN113308658A CN202110119439.6A CN202110119439A CN113308658A CN 113308658 A CN113308658 A CN 113308658A CN 202110119439 A CN202110119439 A CN 202110119439A CN 113308658 A CN113308658 A CN 113308658A
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- steel plate
- silver
- copper
- powder
- mixture
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
Abstract
The application discloses a steel plate with a double-plated coating on the surface, and the preparation process comprises the following steps: s1: polishing the surface of the steel plate to remove an oxide layer on the surface; s2: placing the polished steel plate in a mixed alkali solution of sodium carbonate and sodium hydroxide for 30 min; s3: taking the steel plate out of the mixed alkali liquor, and then putting the steel plate in a dilute hydrochloric acid solution for 15 min; s4: taking the steel plate out of the dilute hydrochloric acid solution, and then spraying the steel plate with deionized water for 2-5 min; s5: blowing the moisture on the surface of the steel plate to be dry by using nitrogen; s6: melting silver and copper into liquid, adding ferroferric oxide powder into the mixture of the liquid silver and the liquid copper to prepare a solid-liquid mixture, and uniformly coating the solid-liquid mixture on the surface of the steel plate. The invention has the following beneficial effects: the surface of the steel plate is coated with a layer of mixture of copper powder, silver powder and ferroferric oxide powder, so that the surface of the steel plate is coated with an antibacterial layer, and bacteria cannot grow on the surface of the steel plate.
Description
The application is a divisional application with the application date of 2019, the date of 01, and the date of 30, the application number of 2019100898347, and the patent name of 'preparation process of steel plate with surface antibacterial coating'.
Technical Field
The invention relates to the field of steel plate production, in particular to a steel plate with a double-plated coating on the surface.
Background
Many clean shops and laboratory have very high requirement to clean degree, if the bacterial colony in workshop or the laboratory exceeds standard, so equipment such as ultraviolet germicidal lamp all can be installed in many clean shops or laboratory on the furred ceiling, lay the steel sheet on wall and floor simultaneously to just open the ultraviolet germicidal lamp at every interval and disinfect.
The steel sheet has good reflectivity, and when the ultraviolet germicidal lamp on the furred ceiling, the steel sheet can guarantee that every corner in workshop or laboratory can both shine the ultraviolet ray through reflecting the ultraviolet ray, plays good bactericidal effect to whole car or person laboratory. But the light transmissivity of steel sheet is extremely poor, and only one face of steel sheet can receive the shining of ultraviolet lamp, so the steel sheet can not receive that the one side of ultraviolet irradiation must have the condition that bacterial growing, simultaneously because there must have the clearance between steel sheet and the steel sheet, when having staff (the ultraviolet lamp is in the off-state this moment) to carry out the operation in the workshop or in the laboratory, these bacterium and fungi will pass through the clearance between steel sheet and the steel sheet and get into in the workshop or in the laboratory, make the cleanliness factor that gets workshop or laboratory not up to standard.
Disclosure of Invention
The invention provides a steel plate with double plating coatings on the surface aiming at the problems.
The technical scheme adopted by the invention is as follows:
a steel plate with a double-plated coating on the surface is prepared by the following steps:
s1: polishing the surface of the steel plate to remove an oxide layer on the surface;
s2: placing the polished steel plate in a mixed alkali solution of sodium carbonate and sodium hydroxide for 30 min;
s3: taking the steel plate out of the mixed alkali liquor, and then putting the steel plate in a dilute hydrochloric acid solution for 15 min;
s4: taking the steel plate out of the dilute hydrochloric acid solution, and then spraying the steel plate with deionized water for 2-5 min;
s5: blowing the moisture on the surface of the steel plate to be dry by using nitrogen;
s6: melting silver and copper into liquid, adding ferroferric oxide powder into the mixture of the liquid silver and the liquid copper to prepare a solid-liquid mixture, and uniformly coating the solid-liquid mixture on the surface of the steel plate.
In this scheme, set up the mixture coating of one deck copper and silver on the surface of steel sheet, because copper has good antibacterial action with silver, make steel sheet self have the ability that restraines bacterial growing like this, simultaneously because add the ferroferric oxide powder in the molten mixture liquid of copper and silver, when silver and copper solidify, the ferroferric oxide powder can distribute uniformly in the mixed layer of copper and silver, the mixed layer of silver and copper will be adsorbed by the steel sheet like this, can not drop from the steel sheet. Although the most common method for adding silver and copper to a steel sheet is electroplating, the silver-plated copper steel sheet obtained by electroplating has three disadvantages:
firstly, the silver-plated copper layer leaves a gap, the gap is directly exposed to the environment, and the gap is easy to become a 'old nest' of various bacteria and fungi;
the second electroplating product, silver and copper are attached to the surface of the steel plate in the form of particles, so that the steel plate is seen by naked eyes to be a layer of silver-copper metal, but actually, the steel plate is countless small silver blocks and small copper blocks, so that the silver and copper electroplated on the steel plate are easy to fall off from the steel plate when being scraped by the outside;
the silver layer and the copper layer of the product obtained by the third electroplating are layered, so the product obtained by the third electroplating is actually a metal antibacterial (silver or copper), and research data shows that the antibacterial effect of the silver and the copper mixed together is far better than that of a metal, so the antibacterial effect of the product obtained by the third electroplating is general.
Compared with an electroplating product, the product obtained by the scheme has the following advantages:
no gap exists on the first silver-plated copper layer, and the steel plate is completely wrapped by the silver-plated layer, so that no 'old nest' of bacteria and fungi exists on the steel plate;
the second silver and copper are directly solidified on the steel plate in a molten state, and the solidified copper and silver are a whole layer, so that the silver and copper are not easy to fall off the steel plate;
the third silver and the copper are fully mixed together in a molten state, so that the solidified copper-silver mixture is formed by the fact that copper exists in silver and silver exists in copper, the two metals jointly resist bacteria during antibiosis, and the antibiosis effect is far better than that of single metal.
According to the method, the surface of the steel plate is coated with a layer of mixture of copper, silver and ferroferric oxide powder, so that an antibacterial layer is coated on the surface of the steel plate, and bacteria cannot grow on the surface of the steel plate.
The beneficial effects of the steps of the scheme are analyzed as follows
1. The steel plate is polished to remove an oxide layer on the surface and ensure that the steel plate is more tightly attached to the silver-plated copper layer.
2. The soaking with the mixed alkali solution and the dilute hydrochloric acid solution is alkali washing and acid washing, and the purpose of the soaking is to remove grease on the surface.
3. The deionized water is used to spray the steel sheet in order to remove the chloride ions on the surface of the steel sheet, and the deionized water is used in order to avoid the residual of other ions on the surface of the steel sheet.
4. The nitrogen blow-drying is performed to prevent a new oxide layer from being formed on the surface of the steel sheet.
Optionally, the concentration of the sodium carbonate solution is 5g/mL, the concentration of the sodium hydroxide solution is 3g/mL, and the mixed alkali solution is prepared by mixing the sodium hydroxide solution and the sodium carbonate solution according to a ratio of 1: 1, mixing to obtain the product.
Optionally, the silver: copper: the mass ratio of ferroferric oxide is 5: 5: 1.
because the mixed layer of silver and copper is required to reflect ultraviolet light, the addition amount of ferroferric oxide cannot be too high, and once the addition amount of the ferroferric oxide is too high, the ultraviolet light reflection performance of the steel plate is reduced.
Optionally, after the copper and silver mixed layer on the surface of the steel plate is solidified, the carboxymethyl chitosan, the sodium stearate, the glycerol, the silicon dioxide powder and the sodium benzoate are mixed and stirred uniformly, and then the mixture is coated on the surface of the silver and copper mixed layer after being mixed uniformly.
Because the steel plate is laid on the wall and the ground of a workshop (or a laboratory), the wall and the ground of a building certainly contain a large amount of bacteria, even if sterilization measures are taken before the steel plate is laid, the bacteria on the surface can be killed, and the growth and the propagation of the bacteria can not be inhibited for part of bacteria in the wall body (and in the floor), because the wall body and the floor are provided with gaps which are the best places for the bacteria to grow and propagate. Therefore, the surface of the silver copper layer is coated with the mixture, and the proliferation of bacteria in the wall body is inhibited by the mixture. The carboxymethyl chitosan and sodium benzoate in the coating can inhibit the proliferation of bacteria in the wall body.
The effects of the above species are as follows:
1. carboxymethyl chitosan inhibits bacterial growth; 2. the sodium stearate plays a role of a waterproof and stabilizing agent, and prevents the carboxymethyl chitosan and the sodium benzoate from being condensed on the silver-copper layer and being dissolved away by liquid drops; 3. the glycerol is used as a bonding agent to bond the sodium stearate, the carboxymethyl chitosan, the silicon dioxide powder and the sodium benzoate together; 4. the silicon dioxide powder is used as a filling agent, when the coating gradually falls off from the silver-plated copper layer, the silicon dioxide powder is infiltrated into gaps of the wall body to block the gaps of the wall body, so that the condition of bacterial proliferation does not exist on the surface of the wall body; 5. sodium benzoate has the function of killing bacteria.
The coating of the above mixture is described in detail as follows: taking a wall as an example, when a steel plate is just attached to the wall body, the mixture coating is completely attached to the silver-copper layer, the mixture slowly falls off from the silver-copper layer along with the prolonging of the service time, the carboxymethyl chitosan and the sodium benzoate can infiltrate into gaps of the wall body to kill bacteria in the gaps, and meanwhile, the silicon dioxide powder infiltrates into the gaps to completely block the gaps, so that the bacteria do not have a space for growth and reproduction.
It should be noted that, because the mixture is applied to both sides of the steel plate, the side not in contact with the wall can be directly scraped by a scraper when the steel plate is installed. And the thickness of the mixture coating is ensured to be not more than 0.1mm during preparation.
The existence of the coating can kill bacteria in the wall body, and no space for bacteria to grow and breed exists in the wall body.
Optionally, the weight ratio of the carboxymethyl chitosan, the sodium stearate, the glycerol, the silicon dioxide powder and the sodium benzoate is 1: 1: 3: 3: 1.
optionally, the silica powder is a nanoscale silica powder.
Optionally, the sulfur-containing composite material further comprises sulfur powder, wherein the sulfur powder is added into the mixture of the carboxymethyl chitosan and the sodium stearate, and the mass ratio of the carboxymethyl chitosan to the sulfur powder is 10: 1.
the function of a small amount of sulfur is to inhibit the breeding of insects and ants between the silver-copper layer and the wall body.
Optionally, the ferroferric oxide powder is nano-scale ferroferric oxide powder.
Optionally, the steel plate is subjected to heat treatment before being subjected to polishing treatment.
Optionally, the thickness of the steel plate is not less than 10mm, and the thickness of the copper and silver mixed coating is not more than 1 mm.
The invention has the beneficial effects that: the surface of the steel plate is coated with a layer of mixture of copper powder, silver powder and ferric oxide powder, so that the surface of the steel plate is coated with an antibacterial layer, and bacteria cannot grow on the surface of the steel plate.
The specific implementation mode is as follows:
the present invention will be described in detail with reference to examples.
S1, taking a steel plate with the thickness of 15mm as a raw material, carrying out heat treatment on the steel plate, and grinding the surface of the steel plate by using a grinding machine after the heat treatment is finished;
s2, preparing a mixed alkali solution and a dilute hydrochloric acid solution, wherein the concentration of the sodium carbonate solution is 5g/mL, the concentration of the sodium hydroxide solution is 3g/mL, and mixing the sodium hydroxide solution and the sodium carbonate solution according to the ratio of 1: 1, mixing to obtain mixed alkali liquor; adding deionized water into concentrated hydrochloric acid to obtain dilute hydrochloric acid solution with pH value of 1;
s3, immersing the steel plate in alkali liquor for 30min, wherein the temperature of the alkali liquor is maintained at 30-40 ℃, and then placing the steel plate in a dilute hydrochloric acid solution for 15min, wherein the temperature of the dilute hydrochloric acid is maintained at 20-30 ℃ in the whole process;
s4 the steel plate is rinsed with deionized water for 3min, and then the surface moisture is blown dry with nitrogen.
S5 mixing the pure silver particles with the pure copper particles in a ratio of 1: 1, heating the mixture to 1084 ℃, putting ferric oxide powder (the addition amount is 20% of the mass of the pure silver particles) into the mixed melt, uniformly stirring, putting the mixture on the surface of a steel plate uniformly coated with the mixture, and controlling the thickness of a coating to be 1 mm;
s6 mixing carboxymethyl chitosan, sodium stearate, glycerol, silicon dioxide powder, sodium benzoate and sulfur powder according to the weight ratio of 1: 1: 3: 3: 1: 0.1, uniformly mixing and stirring, smearing the mixture on the silver-copper layer after uniformly stirring, and controlling the thickness of the coating to be 0.1 mm.
The silicon dioxide powder and the ferroferric oxide powder are both nano-scale.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, which is defined by the claims and their equivalents, and can be directly or indirectly applied to other related fields of technology.
Claims (8)
1. The steel plate with the double-plated coating on the surface is characterized by comprising the following steps:
s1: polishing the surface of the steel plate to remove an oxide layer on the surface;
s2: placing the polished steel plate in a mixed alkali solution of sodium carbonate and sodium hydroxide for 30 min;
s3: taking the steel plate out of the mixed alkali liquor, and then putting the steel plate in a dilute hydrochloric acid solution for 15 min;
s4: taking the steel plate out of the dilute hydrochloric acid solution, and then spraying the steel plate with deionized water for 2-5 min;
s5: blowing the water on the surface of the steel plate to be dry by using nitrogen;
s6: melting silver and copper into liquid, adding ferroferric oxide powder into the mixture of the liquid silver and the liquid copper to prepare a solid-liquid mixture, and uniformly coating the solid-liquid mixture on the surface of the steel plate;
the concentration of the sodium carbonate solution is 5g/mL, the concentration of the sodium hydroxide solution is 3g/mL, and the mixed alkali liquor is prepared by mixing a sodium hydroxide solution and a sodium carbonate solution according to the weight ratio of 1: 1, mixing to obtain the product;
after the copper and silver mixed layer on the surface of the steel plate is solidified, carboxymethyl chitosan, sodium stearate, glycerol, silicon dioxide powder and sodium benzoate are mixed and stirred uniformly, and then the mixture is coated on the surface of the silver and copper mixed layer.
2. The steel sheet having a surface with a double plating layer according to claim 1, wherein the ratio of silver: copper: the mass ratio of ferroferric oxide is 5: 5: 1.
3. the steel plate with double-plated coating on surface according to claim 1, wherein the weight ratio of the carboxymethyl chitosan, the sodium stearate, the glycerol, the silicon dioxide powder and the sodium benzoate is 1: 1: 3: 3: 1.
4. the steel sheet having a surface with a double plating layer according to claim 1, wherein the silica powder is a nano-sized silica powder.
5. The steel plate with double-coated surface according to claim 4, further comprising sulfur powder, wherein carboxymethyl chitosan, sodium stearate, glycerol, silicon dioxide powder, sodium benzoate and the sulfur powder are uniformly mixed, and the mass ratio of the carboxymethyl chitosan to the sulfur powder is 10: 1.
6. the steel sheet having a surface with a double plating layer according to claim 1, wherein the magnetite powder is a nano-sized magnetite powder.
7. The steel sheet having a surface with a double plating layer according to claim 1, wherein the steel sheet is heat-treated before being subjected to a grinding treatment.
8. The steel sheet having a surface with a double plating layer according to claim 1, wherein the thickness of the steel sheet is not less than 10mm, and the thickness of the copper-silver mixed coating is not more than 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110119439.6A CN113308658B (en) | 2019-01-30 | 2019-01-30 | Steel plate with double-plating coating on surface |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910089834.7A CN109763084B (en) | 2019-01-30 | 2019-01-30 | Preparation process of steel plate with surface antibacterial coating |
| CN202110119439.6A CN113308658B (en) | 2019-01-30 | 2019-01-30 | Steel plate with double-plating coating on surface |
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| CN201910089834.7A Division CN109763084B (en) | 2019-01-30 | 2019-01-30 | Preparation process of steel plate with surface antibacterial coating |
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| CN113308658A true CN113308658A (en) | 2021-08-27 |
| CN113308658B CN113308658B (en) | 2022-12-27 |
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| CN202110119411.2A Active CN112941443B (en) | 2019-01-30 | 2019-01-30 | Coating type preparation process for plating coating on surface of steel plate |
| CN202110119410.8A Active CN112941442B (en) | 2019-01-30 | 2019-01-30 | Preparation process of steel plate surface coating based on heat treatment |
| CN202110119439.6A Active CN113308658B (en) | 2019-01-30 | 2019-01-30 | Steel plate with double-plating coating on surface |
| CN201910089834.7A Active CN109763084B (en) | 2019-01-30 | 2019-01-30 | Preparation process of steel plate with surface antibacterial coating |
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| CN202110119410.8A Active CN112941442B (en) | 2019-01-30 | 2019-01-30 | Preparation process of steel plate surface coating based on heat treatment |
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- 2019-01-30 CN CN202110119410.8A patent/CN112941442B/en active Active
- 2019-01-30 CN CN202110119439.6A patent/CN113308658B/en active Active
- 2019-01-30 CN CN201910089834.7A patent/CN109763084B/en active Active
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| US20120244386A1 (en) * | 2011-03-25 | 2012-09-27 | Hon Hai Precision Industry Co., Ltd. | Coated article having antibacterial effect and method for making the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112941442B (en) | 2022-12-27 |
| CN112941442A (en) | 2021-06-11 |
| CN113308658B (en) | 2022-12-27 |
| CN109763084B (en) | 2021-03-23 |
| CN112941443A (en) | 2021-06-11 |
| CN109763084A (en) | 2019-05-17 |
| CN112941443B (en) | 2022-11-04 |
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Denomination of invention: Steel plate with double coating on the surface Effective date of registration: 20230727 Granted publication date: 20221227 Pledgee: Fuyang sub branch of Bank of Hangzhou Co.,Ltd. Pledgor: ZHEJIANG HUADA NEW MATERIAL Co.,Ltd. Registration number: Y2023980050008 |