CN203937247U - A kind of anti-bacteria stainless steel of surperficial argentiferous - Google Patents
A kind of anti-bacteria stainless steel of surperficial argentiferous Download PDFInfo
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- CN203937247U CN203937247U CN201420221860.3U CN201420221860U CN203937247U CN 203937247 U CN203937247 U CN 203937247U CN 201420221860 U CN201420221860 U CN 201420221860U CN 203937247 U CN203937247 U CN 203937247U
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Abstract
The utility model discloses a kind of anti-bacteria stainless steel of surperficial argentiferous, comprise that parent metal layer and infiltration are deposited on the silver-containing antibacterial layer on parent metal layer surface, wherein said parent metal layer is stainless steel; Described silver-containing antibacterial layer is comprised of compound layer and diffusion layer two parts, and wherein the thickness of compound layer is 8～10 μ m, is metallurgical binding between silver-containing antibacterial layer and matrix; Described silver-containing antibacterial layer thickness is 60～100 μ m.Between the antibacterial surface rete of anti-bacteria stainless steel of surface argentiferous and matrix, be metallurgical binding, do not have the problem of peeling off, antibiotic layer product having enhanced antibacterial action, thickness are controlled, and preparation technology is simple, and cost is low.
Description
Technical field
The utility model relates to anti-bacteria stainless steel, and particularly a kind of anti-bacteria stainless steel of surperficial argentiferous, belongs to material technology field.
Background technology
Along with the development of China's economic, the application of stainless steel in food industry, food and restaurant service industry and family life is more and more extensive, to the demand of the antimicrobial treatment of stainless steel products, also will get more and more, and antibacterial problem has entered cooker industry, the catering trade.Anti-bacteria stainless steel is to point in stainless steel to add the appropriate metallic element with antibacterial effect, after antibiotic property heat treatment, the bacterium that makes to be attached to stainless steel surfaces is irreproducible, the quantity of bacterium is suppressed at low-level state, meanwhile, anti-bacteria stainless steel also retains the features such as corrosion resistance, good workability, security and bright looking that stainless steel itself has.Anti-bacteria stainless steel has excellent broad spectrum antibacterial performance, has broad application prospects.At present, research and development high-performance, stainless steel antibacterial treatment process is extremely urgent cheaply.
The preparation method of anti-bacteria stainless steel has:
" a kind of anti-bacteria stainless steel of surface containing cerium " (publication number CN202054884U) discloses the method containing the anti-bacteria stainless steel of cerium alloy layer with two brightness plasma permeating technology preparations surface, part technological parameter is: source voltage 900～1100V, cathode voltage 500～600V, 800～850 ℃ of temperature.Because simple substance cerium fusing point is lower, during plating, in molten condition, must be placed in graphite crucible, and very easily oxidation, to test operation, cause certain difficulty.
" a kind of anti-bacteria stainless steel of copper-cerium-containing surface " (publication number CN202054883U) discloses the method for preparing the anti-bacteria stainless steel of copper-cerium-containing surface alloy-layer by two brightness plasma permeating technology, part technological parameter is: anode voltage 900V, cathode voltage 550V, 820～860 ℃ of plating temperature, temperature retention time 3.5 hours.This technique can obtain more stable copper cerium alloy layer, but long processing time, and power consumption is larger, and has high temperature deformation problem while processing sheet workpiece.
" a kind of copper-bearing antibacterial stainless steel and preparation method thereof " (publication number CN103276300U) discloses a kind of cupric stainless steel and preparation method thereof.The stainless composition of this copper-bearing antibacterial and mass percent are: C:0.08-0.25 % by weight, Cr:11.00-30.00 % by weight, Si :≤2.80 % by weight, Cu:0.40-3.20 % by weight, Mn :≤2.00 % by weight, Zn :≤1.10 % by weight, Al :≤3.20 % by weight, N :≤0.30 % by weight, and one or more in following alloying element: Ti, Nb, Mo, V, Zr, Sn, Sc, each≤1.00 % by weight, surplus is Fe and inevitable impurity.Its preparation method is: batching; Melting; After rotten processing, carry out ultrasonic wave processing; Moulding by casting; Heat treatment: heat treatment comprises solution treatment and Ageing Treatment.
" a kind of anti-bacteria stainless steel of copper-cerium-containing surface film " (publication number CN203007383U) discloses a kind of anti-bacteria stainless steel that utilizes magnetron sputtering method to prepare copper-cerium-containing surface film.But the shortcomings such as power consumption is high, target utilization is low, prepared rete is thinner that magnetron sputtering method exists, so its cost is higher, is not suitable for large-scale production.
Above-mentioned several anti-bacteria stainless steel all be take copper as antiseptic elements, and antibacterial effect is generally poor.
Silver, as antiseptic, is used long-standing.In all metal ions, silver ion has very high oxidation-reduction potential, reactivity is very large, its anti-microbial property is approximately 100 times of copper, adding a small amount of silver just can make stainless steel have good anti-microbial property (addition is about 0.03～0.1% left and right), silver also has that biological safety is high simultaneously, has a broad antifungal spectrum, do not produce the features such as drug resistance, and silver is that anti-biotic material is current study hotspot.But because silver-colored price is too high.Therefore aspect the popular antibacterial cooker of popularization, tableware, how people can guarantee stainless anti-microbial property if being placed on research emphasis, can reduce again in the technical study of silver-colored use amount, such as the nanometer to argentiferous particle is processed or only antimicrobial treatment etc. carried out in stainless surface.
Utility model content
The utility model provides a kind of anti-bacteria stainless steel of surperficial argentiferous, this anti-bacteria stainless steel has good antibiotic property, and improved original corrosion resisting property, film base conjugation is high, and technique is simple, energy consumption is low, pollution-free, and guaranteed, on the less basis of silver-colored use amount, to have good antibiotic property.
The anti-bacteria stainless steel of a kind of surperficial argentiferous that the utility model provides, comprises that parent metal layer and infiltration are deposited on the silver-containing antibacterial layer on parent metal layer surface, and wherein said parent metal layer is stainless steel; Described silver-containing antibacterial layer is comprised of compound layer and diffusion layer two parts, and wherein the thickness of compound layer is 8～10um, between silver-containing antibacterial layer and matrix, is metallurgical binding, and bond strength is high; Described silver-containing antibacterial layer thickness is 60～100um.
Further, in described antibiotic layer, the mass percentage content of silver is 0.025～0.07%.
The preparation method of the anti-bacteria stainless steel of above-mentioned a kind of surperficial argentiferous is, adopt liquid phase plasma electrolysis infiltration technology, in containing the electrolyte of silver ion, carry out plasma electrolysis infiltration deposition, antibacterial metal silver is implanted to stainless steel-based surface layer, make its surface obtain silver-containing antibacterial layer, specifically comprise the following steps:
(1) polishing parent metal: with abrasive paper for metallograph, parent metal is polished, the parent metal after being polished; The roughness of the base metal surface after described polishing is less than Ra0.050;
(2) acetone wiping: the parent metal after adopting acetone reagent to polishing carries out wiping, removes matrix surface greasy dirt, is polished, the matrix after oil removing;
(3) liquid phase plasma electrolysis infiltration: add electrolyte in container, the parent metal after polishing, oil removing is placed in to electrolyte and carries out liquid phase plasma electrolysis infiltration deposition;
(4) cleaning-drying: infiltration has deposited rear water and rinsed, then natural drying, obtains the anti-bacteria stainless steel of surperficial argentiferous.
Preferably, described parent metal is stainless steel; Described stainless steel comprises SUS304 stainless steel, SUS430 stainless steel or SUS430LX stainless steel.
Preferably, described polishing is for to polish 3～5 times to parent metal with abrasive paper for metallograph, and adopting for the last time granularity is 1000 object sand paper.
Preferably, described liquid phase plasma electrolysis infiltration is deposited as and adopts asymmetrical square wave interchange mao power source to carry out antiseptic elements deposition to matrix, infiltration voltage 160～250V, infiltration electric current 10～40A, time of penetration 3～10min; Described liquid phase plasma electrolysis infiltration deposition process middle-jiao yang, function of the spleen and stomach is stainless steel groove very, and negative electrode is parent metal.
Preferably, in described liquid phase plasma electrolysis infiltration deposition process, electrolyte is carried out to circulating cooling, make the temperature of electrolyte remain on 20～45 ℃.
Preferably, described electrolyte is the mixed liquor of the deionized water solution of silver ammino solution and lyotropic salt, and its mixed proportion should meet (take percent by volume) silver ammino solution: the deionized water solution of lyotropic salt is 9:1～32:1.
Preferably, the lyotropic salt in the deionized water solution of described lyotropic salt comprises more than one in sodium nitrate, sodium fluoride and NaOH.
Preferably, the concentration of described silver ammino solution is 100～180gL
-1; The concentration of the deionized water solution of described lyotropic salt is 5～10gL
-1.
Preferably, the mass fraction of the deionized water solution of lyotropic salt is 5wt%～10wt%.
Compared with prior art, advantage of the present utility model is:
(1) product having enhanced antibacterial action.Anti-bacteria stainless steel in the past mostly be take copper as antiseptic elements, and antibacterial effect is generally poor.In all metal ions, silver ion has very high oxidation-reduction potential, reactivity is very large, its anti-microbial property is approximately 100 times of copper, add a small amount of silver and just can make stainless steel have good anti-microbial property (addition is about 0.03～0.1% left and right), silver also has that biological safety is high simultaneously, has a broad antifungal spectrum, do not produce the features such as drug resistance.
(2) technique is simple.The advantages such as plasma electrolysis infiltration technology has the processing time short, and operating voltage is low, and treatment process is simple, and scope on probation is wide.Technique is simple, is applicable to large-scale production.
(3) cost is low.This technology has overcome that silver-containing antibacterial stainless steel silver consuming amount was larger in the past, the shortcoming that cost is higher.The whole anti-bacteria stainless steel of argentiferous was in integral material, to add precious metal element silver in the past, and the addition of silver is generally 0.4% left and right, and the consumption of silver is large, and cost is high.The thickness of stainless steel surfaces antibiotic layer prepared by this technology only has tens microns, and the consumption of silver reduces greatly.Meanwhile, because antibiotic layer is to form in cheap Ag-containing solution (silver ammino solution).So antibiotic layer cost prepared by this technology reduces greatly.
(4) antibiotic layer and basal body binding force are strong.Owing to being metallurgical binding between the antibiotic layer of liquid phase plasma electrolysis infiltration preparation and matrix, so compare with coating anti-bacteria stainless steel, there is not the problem of peeling off in antibacterial surface layer prepared by this technology.
(5) antibiotic layer corrosion resistance, wearability are good.The antibiotic layer of liquid phase plasma electrolysis infiltration preparation has good corrosion resistance and wearability.
Accompanying drawing explanation
Fig. 1 is the liquid phase plasma electrolysis permeability apparatus schematic diagram that the utility model is used;
Fig. 2 is the structural representation of anti-bacteria stainless steel of the surperficial argentiferous of the utility model gained, and wherein 11 is stainless steel base layer, the diffusion layer of the 12 antibacterial retes that are argentiferous, the compound layer of the 13 antibacterial retes that are argentiferous.
The specific embodiment
Be below specific embodiment of the utility model, the technical solution of the utility model is further described, but the utility model is not limited to these embodiment.
Liquid phase plasma electrolysis infiltration deposition step in following examples all carries out in the liquid phase plasma electrolysis permeability apparatus shown in Fig. 1.In figure, 1 is power-supply system; 2 is ammeter; 3 is voltmeter; 4 is cooling system; 5 is parent metal; 6 is electrolyte; 7 is stirring system; 8 is insulating materials; 9 is stainless container; 10 is cooling water.
Said apparatus mainly comprises power-supply system 1, stainless container 9 and cooling system 4.Wherein parent metal 5 is connected with the negative pole in power-supply system 1 by wire, and stainless container 9 is connected with the positive pole of power-supply system 1 by wire, and stainless container 9 inside are full of electrolyte 6; Wherein ammeter 2 is connected with power-supply system 1 and parent metal 5 by wire, is positioned in the middle of power-supply system 1 and parent metal 5, and voltmeter is parallel between stainless container 9 and parent metal 5 by wire.In cooling system 4, be full of cooling water 10; Stainless container 9 is arranged in the cooling system 4 that is full of cooling water 10, and stainless container 9 bottoms are provided with insulating materials 8 and separate with the bottom of cooling system 4; Stirring system 7 is for stirring electrolyte 6.
Power-supply system adopts the asymmetrical square wave of Guangzhou Jing Yuan electronic equipment company customization to exchange mao power source (rated power: 50KVA, average current: 0～50A).During work, workpiece is as negative electrode, and stainless steel tank is as anode, overheated and cause workpiece to burn and workpiece electrolyte boiling around for fear of workpiece, carry out circulating cooling to electrolyte, and the temperature of electrolyte is remained on below 45 ℃.Electrolyte selects silver ammino solution system as electrolyte main body, adds therein appropriate lyotropic salt and deionized water and meets the requirement of electrolyte conduction.
Embodiment 1
(1) take SUS304 Austenitic stainless steel is parent metal, and line cuts into the sample of 15mm * 15mm * 4mm, first uses 800 object sand paperings, then uses 1000 object sand papering stainless steel surfaces, and making its surperficial roughness is Ra0.045.
(2) adopt acetone and under ultrasonic environment, remove the greasy dirt of stainless steel surfaces, the amount of acetone is for just covering stainless steel sample, and ultrasonic time is 10 minutes; After ultrasonic oil removing, then with drying up after washed with de-ionized water.
(3) in equipment electrolytic cell, add silver ammino solution, sodium nitrate and deionized water to be mixed with electrolyte, stainless steel after cleaning is placed in to electrolyte to permeate, liquid phase plasma electrolysis penetration equipment adopts asymmetrical square wave to exchange mao power source (rated power: 50KVA, average current: 0～50A), and be furnished with ammeter, voltmeter, cooling system and stirring system, specifically see Fig. 1; During infiltration, take stainless steel tank as anode, and matrix stainless steel is negative electrode; In process of osmosis, open cooling system electrolyte temperature is remained at below 45 ℃, the composition of described penetrating fluid and ratio are (in percent by volume) silver ammino solution: the deionized water solution=19:1 of sodium nitrate.
(4) permeated the rear deionized water rinsing surface of using, then natural drying, obtain.
Table 1 is Partial Liquid Phase plasma electrolysis permeability parameters and antibacterial film structural parameters.As can be seen from the table, along with the infiltration rising of voltage and the increase of time of penetration, its thicknesses of layers is in rising trend, and process controllability is good.
Table 2 is the chemical composition of partial silver anti-bacteria stainless steel.As can be seen from the table, 1～3 group of sample is after liquid phase plasma infiltration, and its surface has all obtained the antibiotic layer of different silver ion contents, and all the other compositions are all identical with former stainless steel base composition, there is no obvious change.
Table 1 liquid phase plasma electrolysis permeability parameters and antibacterial film structural parameters
The stainless chemical composition of table 2 silver-containing antibacterial, wt.%
The performance test of silver-containing antibacterial stainless steel.
1. anti-microbial property test:
With reference to the disposable use amenities of GB15979-2002 < < sanitary standard > > and the < < of Ministry of Health of the People's Republic of China disinfection technology standard > >, adopt agar plate method to carry out anti-microbial property check, the impact of research modified technique on stainless steel anti-microbial property.Required articles for use have: HNP-1 type horizontal flow shape superclean bench, electro-heating standing-temperature cultivator, High pressure steam sterilizer and platinum platinum wire etc.Concrete operation step is as follows:
With containing the absorbent cotton of 75% ethanol by sample clean, degreasing, and at 121 ℃ autoclaving 30min.
It is that the bacterium liquid of 10～10cfu/ml is standby that bacterial classification after inoculated and cultured is diluted to concentration with aseptic AATCC meat soup.
With pipette, respectively 0.1ml bacterium liquid is evenly dropped in through autoclaved specimen surface.
Surface is dripped have the antibacterial sample of bacterium liquid and control sample to put into 35 ± 1 ℃ of temperature, more than 90% incubator of humidity is done 24h Bacteria Culture.
With agar cultivation (35 ± 1 ℃ of temperature, humidity more than 90%, time 24h), measure viable count.
Each bacterial classification and sample all repeat 3 times, average.Anti-microbial property is evaluated with sterilization rate, and sterilization rate calculates with following formula:
In above-mentioned formula, control sample viable count refers to that contrast stainless steel sample carries out the viable count after bacterium culture test, and anti-viable count refers to that anti-bacteria stainless steel sample carries out the viable count after bacterium culture test.Experimental result is in Table 3.
Table 3 is the anti-microbial property of part anti-bacteria stainless steel.Result from table, the austenitic stainless steel sample before silver ion infiltration does not have any antibacterial effect; Sample after silver ion infiltration all has antibacterial effect in various degree to Escherichia coli and staphylococcus aureus.All infiltration samples all show good antibacterial effect to Escherichia coli, and sterilization rate is all more than 99%; The antibacterial effect of staphylococcus aureus is not so good as to Escherichia coli remarkable, but has antibacterial effect to a certain degree.Along with the increase of silver ion content, the antibacterial effect of sample is obvious ascendant trend.
2. corrosion resistance test:
Adopt the sample of electrochemical test method research silver ion before and after the infiltrating corrosion behavior in 3.5%NaCl solution at normal temperatures and pressures, electrochemical test is undertaken by GB4334.9-84 (stainless steel erosion potential measurement method), corrosion sample size is 15mm * 15mm * 4mm, through the pre-passivation of nitric acid, epoxy resin is inlayed, expose 1cm2 test face, in the 3.5%NaCl of 30 ℃ of abundant deoxygenations solution, adopt SP-150 electrochemical workstation to carry out electrokinetic potential slow scanning method and measure anodic polarization curves, when electric current reaches 1mA, current potential returns to scanning.Experimental result is in Table 4.
Table 4 is the stainless chemical attack experiment contrast of silver-containing antibacterial table.As can be seen from the table, corrosion potential and the corrosion electric current density of the sample after liquid phase plasma infiltration all decrease, corrosion resisting property is all better than the common stainless steel sample without liquid phase plasma infiltration, and along with the increase of silver ion content, its corrosion resisting property improves gradually.
The stainless anti-microbial property of table 3 silver-containing antibacterial
The stainless chemical attack experiment contrast of table 4 silver-containing antibacterial table
Unlike the prior art: Plasma Electrolytic Saturation Technique in Solution of the present utility model is that material is placed in to specific electrolyte, utilize electrochemical method, under heat chemistry, plasma chemistry and electrochemical acting in conjunction, in metal surface, obtain a kind of surface treatment method of permeable formation.This technical matters is simple, in the time of a few minutes, can form permeable formation wear-resisting, anti-corrosion, product having enhanced antibacterial action at metal base surface.
Claims (2)
1. an anti-bacteria stainless steel for surperficial argentiferous, is characterized in that comprising that parent metal layer and infiltration are deposited on the silver-containing antibacterial layer on parent metal layer surface, and wherein said parent metal layer is stainless steel; Described silver-containing antibacterial layer is comprised of compound layer and diffusion layer two parts, and wherein the thickness of compound layer is 8 ~ 10um, is metallurgical binding between silver-containing antibacterial layer and matrix; Described silver-containing antibacterial layer thickness is 60 ~ 100um.
2. the anti-bacteria stainless steel of a kind of surperficial argentiferous according to claim 1, is characterized in that described stainless steel is SUS304 stainless steel, SUS430 stainless steel or SUS430LX stainless steel.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107299320A (en) * | 2015-11-16 | 2017-10-27 | 王贝 | A kind of anti-bacteria stainless steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107299320A (en) * | 2015-11-16 | 2017-10-27 | 王贝 | A kind of anti-bacteria stainless steel |
| CN107299320B (en) * | 2015-11-16 | 2018-12-25 | 佛山市钿汇不锈钢有限公司 | A kind of anti-bacteria stainless steel |
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Granted publication date: 20141112 Termination date: 20190430 |