CN202054884U - Antibacterial stainless steel with surface containing cerium - Google Patents
Antibacterial stainless steel with surface containing cerium Download PDFInfo
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- CN202054884U CN202054884U CN2011200846731U CN201120084673U CN202054884U CN 202054884 U CN202054884 U CN 202054884U CN 2011200846731 U CN2011200846731 U CN 2011200846731U CN 201120084673 U CN201120084673 U CN 201120084673U CN 202054884 U CN202054884 U CN 202054884U
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- stainless steel
- cerium
- antibacterial
- bacteria
- containing cerium
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Abstract
The utility model discloses antibacterial stainless steel with the surface containing cerium comprises a stainless steel base material, and is characterized in that an antibacterial layer containing cerium is arranged on the surface of the stainless steel base material through diffusion coating, the content of cerium of the antibacterial layer ranges 0.06wt% to 0.3wt%, and the thickness of a diffused alloy layer ranges from 40 micrometers to 60 micrometers. The antibacterial stainless steel with the surface containing cerium is simple in production technique, original corrosion resistance of the stainless steel cannot be reduced, original mechanical performance of the stainless steel cannot be affected, antibacterial element consumption is less and antibacterial performance of the antibacterial stainless steel layer with cerium is excellent.
Description
Technical field
The utility model relates to anti-bacteria stainless steel, and particularly a kind of surface contains the anti-bacteria stainless steel of cerium.
Background technology
Because stainless steel favorable mechanical performance and erosion resistance, it is one of ferrous materials the most widely of using, is widely used in each industrial circle.And a lot of special dimensions not only require stainless steel attractive in appearance such as articles for daily use such as medical and health industry, food service industry, sanitary equipment, kitchen tools, for stainless germ resistance certain requirement are arranged also.The anti-bacteria stainless steel Study on Technology is risen thereupon.Japan maintains the leading position in the anti-bacteria stainless steel field, and in recent years, China is also in the research of carrying out anti-bacteria stainless steel.At present, the stainless steel antiseptic-germicide is that copper or silver are main, is divided into whole anti-bacteria stainless steel and stainless steel with antibacterial surface according to the distribution anti-bacteria stainless steel of antiseptic elements.Its preparation method has:
The feature antiseptic elements copper of the disclosed anti-bacteria stainless steel of " a kind of austenitic stainless steel " (publication number CN 1504588A) is to be distributed in the stainless steel substrate with ε-Cu phase disperse, stainless steel needs 400～900 ℃ of insulations 0.5～6 hour, makes evenly meter diffusing distribution of copper precipitated phase ε-Cu.
" a kind of austenite antimicrobial stainless steel and manufacture method thereof " (publication number CN 1789471A) disclose prepared anti-bacteria stainless steel be with Cu-Ag-Zn by a certain percentage through melting make master alloy again with together melting of stainless steel, but pass through machine-shaping after casting or forging, the thermal treatment again.The Cu-Ag-Zn master alloy contains (weight %): Ag:1.00～30.00, Zn:1.00～20.00, and all the other are copper.
More than two kinds of technology in the stainless steel preparation process, be antiseptic elements and be distributed among the stainless steel substrate, be whole anti-bacteria stainless steel.All need to carry out ageing treatment in preparation process and make copper separate out mutually, can reach better anti-bacterial effect with ε-Cu.
" a kind of method that adopts ion implantation to prepare anti-bacteria stainless steel " (publication number CN 1566397A) discloses and with ion implantation device Cu or Ag has been injected into stainless steel surface and prepares anti-bacteria stainless steel.
" a kind of method that adopts the double-deck glow legal system to be equipped with anti-bacteria stainless steel " (publication number CN 1793428A) discloses and used the double-deck glow method at stainless steel surface plating copper or silver element, prepares anti-bacteria stainless steel.
More than two kinds of technology be preparation stainless steel with antibacterial surface technology, all to carry out ageing treatment after adding copper.Antiseptic elements is copper or silver.
Also have " a kind of method that adopts the double-deck glow legal system to be equipped with anti-bacteria stainless steel " (publication number CN 1793428A) to disclose the method for preparing surperficial copper bearing anti-bacteria stainless steel with two brightness metal cementationes.
Be published in " metal heat treatmet " paper of 2008 the 33rd the 6th phases of volume " the double-deck glow plasma aluminising of 45 steel surface " and disclose in the method that adopts two brightness plasma technologies in 45 steel alitizings.
Up to the present, yet there are no the report that the surface contains the anti-bacteria stainless steel of cerium.
The utility model content
The purpose of this utility model provides the anti-bacteria stainless steel that a kind of surface contains cerium.
A kind of surface of the utility model contains the anti-bacteria stainless steel of cerium, comprise stainless steel substrate and antibiotic layer, unlike the prior art be: contain the antibiotic layer of cerium at stainless steel substrate surface plating one deck, the cerium amount that contains of antibiotic layer is 0.06～0.3wt%, the diffusion alloy layer thickness: 40～60 μ m.
The plating method that a kind of surface contains the antibiotic layer of cerium is: with pending stainless steel and treat that metallic cementation cerium (powdery or bulk or strip) puts into ion metallizing furnace; The metallic cerium that is soaked in the kerosene is placed plumbago crucible, link to each other with the source electrode power supply; Stainless steel is linked to each other with negative electrode; Working conditions is for being that the argon gas air pressure in the metal leakage furnace is 22Pa, source voltage-1000V, cathode voltage-500V, source electrode and cathode distance: 25mm, 3.5 hours infiltration time.
The utility model anti-bacteria stainless steel can be applicable to make the anti-bacteria stainless steel container and the anti-bacteria stainless steel transport pipeline of food, medical industry.
Anti-bacteria stainless steel of the present utility model is after tested:
1, antibacterial ability test:
To carry out oozing the stainless steel A that cerium is handled
1', A
2', M
1', M
2', T ', S ' and not through oozing the similar stainless steel A that cerium is handled
1, A
2, M
1, M
2, T, S make the sample of 5 * 5cm, the experiment microorganism is adopted intestinal bacteria, streptococcus aureus.Experimental procedure is as follows:
Stainless steel after will oozing cerium and handling and contrast steel clean the back 120 ℃ of following autoclavings 25 minutes with ethanol.
It is 10 that postvaccinal bacterial classification is diluted to concentration with PBS liquid (0.03mol/l, PH=7.2, disodium hydrogen phosphate,anhydrous 2.83g, potassium primary phosphate 1.36g, distilled water 1000ml)
5Standardized solution, and 0.5ml bacterium liquid evenly dripped to sample and contrast stainless steel surface, cover with the aseptic plastic film respectively.
The surface is scribbled the sample of bacterium liquid and contrast stainless steel, and to put into 35 ℃, humidity be effect 24 hours in 90% the incubator.
Placed 48 hours in 35 ℃ incubator with dull and stereotyped agar culture method, on the plastics plate, calculate the bacterium number at last, calculate sterilizing rate.
Antibacterial experiment the results are shown in Table 1.Wherein the calculation formula of sterilizing rate is:
Above-mentioned contrast stainless steel aerobic plate count is the viable count after the contrast stainless steel carries out antibacterial experiment, and the anti-bacteria stainless steel aerobic plate count is meant the viable count after anti-bacteria stainless steel carries out antibacterial experiment.The results are shown in Table 1.
This method also can be used for the viable count after stainless steel carries out antibacterial experiment.
2, antibiotic endurance life test:
Use model MMS-2A frictional testing machines that the anti-bacteria stainless steel of preparation is carried out the sliding frictional wear test with the contrast steel of testing in 2.Rub(bing)test power: 1000N; The sliding friction time: 20min; To grinding material:.The results are shown in Table 1.
3, mechanical property experiment:
To be cut into tension specimen (stretching gauge length 12mm, thick 1mm) through the anti-bacteria stainless steel of antimicrobial treatment.Al2O3 sand paper with 600 granularities carries out mechanical polishing.With carrying out tension test in the private clothes of MTS-810 point protracted test machine, room temperature, the air, rate of extension is 2 * 10
-3s
-1, obtain following mechanical property, see Table 2.
4, chemical corrosion experiment:
Anti-bacteria stainless steel A1 ', the A2 ', M1 ', M2 ', T ', S ' and contrast steel A1, A2, M1, M2, T, the S of the same type that choose preparation carry out electrochemical corrosion test.
(1) slit erosion test
It is 50mrm * 30mrm * 3mm that the crevice corrosion accelerated corrosion test is carried out the crevice corrosion specimen size by GB10127-88 (crevice corrosion test for stainless steel method), in the middle of each sample, bore the hole of a Φ 5mm, with nylon screw the special nylon spacer of two Φ 15mm is fastened on the sample two sides and constitutes 16 fan-shaped artificial slits.Experimental result sees Table 3.
(2) spot corrosion experiment
It is 50mm * 30mm * 3mm that the spot corrosion electrochemical test carries out spot corrosion corrosion specimen size by GB4334.9-84 (stainless steel erosion potential measurement method), adopts Φ 11.3mm * 6mm cylinder sample, and through the pre-passivation of nitric acid, Resins, epoxy is inlayed, and exposes 1cm
2Test face is 30, and " in the 3.5%NaCl solution of the abundant deoxygenation of C, adopt Japanese HZ-1 electro-chemical measuring apparatus to carry out electrokinetic potential slow sweep method and measure anodic polarization curves, when electric current reached 1mA, current potential returned scanning.Experimental result sees Table 3.
Table 1 stainless-steel antibacterial can synopsis
In the table ++ represent sterilizing rate more than 99% ,+represent more than 90% ,-represent sterilizing rate more than 80%,--the expression sterilizing rate is more than 50%, and zero expression sterilizing rate is lower than 50%.
Table 2 anti-bacteria stainless steel mechanical property synopsis
| The stainless steel sequence number | σb(N/mm 2) | δ(％) |
| A 1’ | 550 | 45 |
| A 1 | 550 | 45 |
| A 2’ | 550 | 40 |
| A 2 | 550 | 40 |
| M 1’ | 600 | 16 |
| M 1 | 600 | 16 |
| M 2’ | 1000 | 10 |
| M 2 | 1000 | 10 |
| T’ | 450 | 20 |
| T | 450 | 20 |
| S’ | 480 | 35 |
| S | 480 | 35 |
Table 3 chemical corrosion test synopsis
The utility model has the advantages that:
1, the utility model stainless steel surface has the cerium antibiotic layer, and the surface has good antibacterial effect, and the consumption of Ce elements is less, and the cerium amount that contains of stainless steel surface is 0.06～0.3wt%; Because the content of cerium is less in the stainless steel, does not reduce the original mechanical property of stainless steel for prepared anti-bacteria stainless steel, almost do not reduce for the original corrosion resistance nature of stainless steel;
2, cerium in prepared anti-bacteria stainless steel mainly with CeFe
2, CeFe
5Exist Deng compound form; CeFe
2, CeFe
5Help Ce and separate out, can significantly improve sterilization effect with ionic condition;
3, the utility model technology is carried out plating under the infiltration element molten state; Stainless in the past antiseptic elements is compared with silver based on copper or silver, simple substance cerium low price, and cost is lower.And need carry out ageing treatment as the antiseptic-germicide stainless steel with copper, just can reach better anti-bacterial effect; And of the present utility modelly need not can reach good antibacterial effect through ageing treatment as the whole process of preparation of the anti-bacteria stainless steel of antiseptic-germicide with cerium.Time and cost have been saved.
4, this technology is not limited by the size of substrate material and shape, can prepare the anti-bacteria stainless steel goods of various size and shape.Can be applicable to make the anti-bacteria stainless steel container and the anti-bacteria stainless steel transport pipeline of food, medical industry with the anti-bacteria stainless steel of this preparation technology's preparation.
Description of drawings
Fig. 1 contains the structural representation of the anti-bacteria stainless steel of cerium for the utility model surface.
Among the figure: 1. stainless steel substrate 2. contains the antibiotic cementation coating of cerium
Embodiment
The preparation surface contains the embodiment of the anti-bacteria stainless steel of cerium
The preparation surface contains the anti-bacteria stainless steel of cerium, and the element of plating is a metallic cerium, and stainless steel substrate is austenitic stainless steel A
1, A
1By its chemical constitution be by weight percentage: C:0.02, Si:0.1, Mn:1.0, S:0.002, P:0.045, Cr:21.5, Ni:23.4, Mo:5.1, Ti:0.36, all the other are Fe, adopt two brightness plasma permeating technology and equipment during the plating cerium, and its processing parameter is: metallic cerium places the kerosene of plumbago crucible, argon gas operating air pressure 22Pa, source voltage-1000V, cathode voltage-500V, 850 ℃ of plating temperature, soaking time 3.5 hours, slow cooling is to room temperature, and the antiseptic elements cerium is in molten state in insulating process, the A after oozing cerium and finishing
1Be designated as A
1', the thickness of diffused alloy layer is 42 μ m, the cerium amount that contains of diffused alloy layer is 0.07～0.13wt%.
Be equipped with the martensite antimicrobial stainless steel that the surface contains cerium with the plasma surface alloying legal system, the thickness of diffused alloy layer is 53 μ m, and the cerium amount that contains of diffused alloy layer is 0.15～0.21wt%.The plating method is with embodiment 1.
Embodiment 3
Be equipped with the ferrite antibacterial stainless steel that the surface contains cerium with the plasma surface alloying legal system, the thickness of diffused alloy layer is 48 μ m, and the cerium amount that contains of diffused alloy layer is 0.09～0.16wt%.The plating method is with embodiment 1.
Be equipped with the biphase antibiotic stainless steel that the surface contains cerium with the plasma surface alloying legal system, the thickness of diffused alloy layer is 59 μ m, and the cerium amount that contains of diffused alloy layer is 0.21～0.27wt%.The plating method is with embodiment 1.
Claims (2)
1. a surface contains the anti-bacteria stainless steel of cerium, comprises stainless steel substrate and antibiotic layer, it is characterized in that: contain the antibiotic layer of cerium, diffusion alloy layer thickness: 40 ~ 60 μ m at stainless steel substrate surface plating one deck.
2. anti-bacteria stainless steel according to claim 1 is characterized in that: described stainless steel substrate is austenite or martensite or ferrite or austenite-ferrite duplex stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200846731U CN202054884U (en) | 2011-03-24 | 2011-03-24 | Antibacterial stainless steel with surface containing cerium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200846731U CN202054884U (en) | 2011-03-24 | 2011-03-24 | Antibacterial stainless steel with surface containing cerium |
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| Publication Number | Publication Date |
|---|---|
| CN202054884U true CN202054884U (en) | 2011-11-30 |
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| CN2011200846731U Expired - Fee Related CN202054884U (en) | 2011-03-24 | 2011-03-24 | Antibacterial stainless steel with surface containing cerium |
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|---|---|
| CN (1) | CN202054884U (en) |
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2011
- 2011-03-24 CN CN2011200846731U patent/CN202054884U/en not_active Expired - Fee Related
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20120324 |