CN106222675A - A kind of citric acid cleaning passivator and passivating method - Google Patents
A kind of citric acid cleaning passivator and passivating method Download PDFInfo
- Publication number
- CN106222675A CN106222675A CN201610687580.5A CN201610687580A CN106222675A CN 106222675 A CN106222675 A CN 106222675A CN 201610687580 A CN201610687580 A CN 201610687580A CN 106222675 A CN106222675 A CN 106222675A
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- CN
- China
- Prior art keywords
- passivator
- citric acid
- passivation
- passivating
- present
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 238000004140 cleaning Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000002161 passivation Methods 0.000 claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000002738 chelating agent Substances 0.000 claims abstract description 9
- 230000007797 corrosion Effects 0.000 claims abstract description 9
- 238000005260 corrosion Methods 0.000 claims abstract description 9
- 239000002253 acid Substances 0.000 claims abstract description 8
- 239000006174 pH buffer Substances 0.000 claims abstract description 5
- 239000004094 surface-active agent Substances 0.000 claims abstract description 4
- -1 corrosion inhibiter Substances 0.000 claims abstract description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical group CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims description 3
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims description 3
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical group OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 3
- 235000002949 phytic acid Nutrition 0.000 claims description 3
- 239000000467 phytic acid Substances 0.000 claims description 3
- 229940068041 phytic acid Drugs 0.000 claims description 3
- 108010064470 polyaspartate Proteins 0.000 claims description 3
- 241001597008 Nomeidae Species 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 235000009754 Vitis X bourquina Nutrition 0.000 claims 1
- 235000012333 Vitis X labruscana Nutrition 0.000 claims 1
- 240000006365 Vitis vinifera Species 0.000 claims 1
- 235000014787 Vitis vinifera Nutrition 0.000 claims 1
- 230000003213 activating effect Effects 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 150000003839 salts Chemical class 0.000 abstract description 7
- 239000007921 spray Substances 0.000 abstract description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052804 chromium Inorganic materials 0.000 abstract description 6
- 239000011651 chromium Substances 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 4
- 239000011707 mineral Substances 0.000 abstract description 4
- 230000001590 oxidative effect Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 10
- 239000000243 solution Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 150000001845 chromium compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000000176 sodium gluconate Substances 0.000 description 2
- 235000012207 sodium gluconate Nutrition 0.000 description 2
- 229940005574 sodium gluconate Drugs 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- 241000207199 Citrus Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 235000020971 citrus fruits Nutrition 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 239000013056 hazardous product Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- WTWSHHITWMVLBX-DKWTVANSSA-M sodium;(2s)-2-aminobutanedioate;hydron Chemical compound [Na+].[O-]C(=O)[C@@H](N)CC(O)=O WTWSHHITWMVLBX-DKWTVANSSA-M 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 231100000027 toxicology Toxicity 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 239000012224 working solution Substances 0.000 description 1
Classifications
-
- 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
- C23G1/088—Iron or steel solutions containing organic acids
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/50—Treatment of iron or alloys based thereon
-
- 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
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
- C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
- C23G1/061—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors nitrogen-containing compounds
-
- 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
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
- C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
- C23G1/065—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors sulfur-containing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The present invention relates to a kind of citric acid cleaning passivator and passivating method.Described citric acid cleaning passivator comprises citric acid, chelating agent, corrosion inhibiter, pH buffer agent and surfactant.Described passivating method comprises the steps of and rustless steel sample is immersed in above-mentioned citric acid cleaning passivator passivation, and passivation temperature is 50 55 DEG C, and passivation time is 15 30min；Rustless steel sample is taken out after terminating by passivation, cleans and is dried.Passivator of the present invention uses the citric acid of environmental protection to replace strong oxidizing property mineral acid, the insoluble heavy metal such as nickel, chromium one-tenth in passivating process, thus heavy metal free sewage generates.It is stable that passivator of the present invention generates passivating film course of reaction, and passivating film is thicker relative to the thicknesses of layers of mineral acid, and consistency is higher, and the stability of film layer is the most higher, and the ability of anticorrosive salt spray resistance is the most higher.Passivator of the present invention comprises citric acid and chelating agent, and passivation effect is more preferable.
Description
Technical field
The present invention relates to passivator field, particularly relate to a kind of citric acid cleaning passivator and passivating method.
Background technology
In stainless steel metal is passivated, domestic employing traditional method uses strong acid treatment metal surface so that it is generate protection
Film, thus reach antioxidative effect.And in a lot of developed countries, the most gradually eliminate this traditional passivation mode.Cause
For traditional strong acid while generating passivating film, the also nickel in dissolving rustless steel composition, chromium, make free out heavy metal molten
Solution, in working solution, causes heavy metal pollution.
Additionally, it is main using concentrated nitric acid, concentrated sulphuric acid, chromic acid etc. as strong oxidizer in conventional passivation liquid.Concentrated nitric acid is using
During volatilize in a large number, with in air water formed acid mist, there is strong corrosivity, the health of operator caused shadow
Ring；Additionally, concentrated nitric acid natural decomposition can go out the nitrogen dioxide having pollution to air under illumination condition.Concentrated sulphuric acid does not have volatilization
Property, but there is strong dehydration property, combustion-supporting property, the skin of user can be caused corrosion.Chromium compounds toxicity is relatively big, especially
It is+6 valency chromium, is International Contre research center and the carcinogen of U.S.'s toxicology tissue announcement, there is obvious carcinogenesis.With
Time chromium compounds there is corrosivity, strong oxidizing property and combustion-supporting property, preservation condition is harsher, use process exist safety the most hidden
Suffer from, human body is had injury, unfriendly to environment, use equipment complicated and dangerous.
In order to overcome the defect in conventional passivation liquid, gradually have developed environmentally friendly passivating solution, as blunt in Fructus Citri Limoniae acid type
Change liquid.Such as the Chinese invention patent application of Publication No. CN104674206A, disclose a kind of citric acid environmental friendliness passivating solution,
Use citric acid (5%-20%), hydrogen peroxide (15-25), stabilizer (5%-30%), the proportioning of corrosion inhibiter (1%-10%).Again
Such as the Chinese invention patent application of Publication No. CN101748400A, disclose the passivation of a kind of stainless citric acid and hydrogen peroxide
Liquid, uses citric acid (3%), hydrogen peroxide (10%), the proportioning of ethanol (5%).These passivating solutions of the prior art contain by force
Oxidant hydrogen peroxide, it can resolve into water and oxygen at normal temperatures, causes product and produce the most unstable.
Summary of the invention
In view of this, it is necessary to for above-mentioned problem, it is provided that a kind of citric acid cleaning passivator and passivating method.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of citric acid cleaning passivator, comprises citric acid, chelating agent, corrosion inhibiter, pH buffer agent and surfactant.
Preferably, described citric acid cleaning passivator comprises the following component of following mass fraction:
It is highly preferred that described citric acid cleaning passivator comprises the following component of following mass fraction:
It is further preferred that described citric acid cleaning passivator comprises the following component of following mass fraction:
Preferably, the mixture of one or more during described chelating agent is aminotriacetic acid, sodium gluconate, phytic acid.
Preferably, if described corrosion inhibiter is the mixture of one or more in poly-aspartate and derivant fourth thereof.
Preferably, described pH buffer agent is triethylamine alcohol.
Preferably, one or more mixture during described surfactant is OP-10, OP-13, SG-20.
The passivating method of a kind of above-mentioned citric acid cleaning passivator, comprises the steps of and is immersed in by rustless steel sample
Stating in citric acid cleaning passivator and be passivated, passivation temperature is 50-70 DEG C, and passivation time is 15-30min；Passivation will not after terminating
Rust steel curved beam takes out, and cleans and is dried.
Preferably, described passivation temperature is 65 DEG C, and described passivation time is 25min.
Compared with prior art, there is advantages that
1, passivator of the present invention uses the citric acid of environmental protection to replace strong oxidizing property mineral acid.In use, citric acid
Can preferentially dissolve the free ferrum in metal surface and iron oxides, form dense film for chelating agent and metal and reaction environment is provided.
The insoluble heavy metal such as nickel, chromium one-tenth in passivating process, but they are oxidized to oxide and generate passivating film, thus without a huge sum of money
Belong to sewage to generate.
2, to generate passivating film course of reaction stable for passivator of the present invention, passivating film relative to mineral acid thicknesses of layers more
Thickness, consistency is higher, and the stability of film layer is the most higher, and the ability of anticorrosive salt spray resistance is the most higher, may be used for food, chemical industry,
In the fields such as oil, power, nuclear engineering, space flight and aviation, ocean, medicine, light industry, weaving, stainless steel is antiseptic and rustproof.
3, passivator of the present invention comprises citric acid and chelating agent, and passivation effect is more preferable.Citric acid belongs to environmental protection Organic substance,
Being widely present in nature, Citrus, Fructus Citri Limoniae, rich content in the fruit such as Fructus Ananadis comosi, both safe and easy use, the waste water of discharge can
Directly to be degraded by bio-absorbable；Citric acid is strong to the specific activity chromium of ferrum, it is possible to effective remove stainless steel surfaces free iron and
Metallic iron, thus it is enriched with chromium, produce passivating film.Chelating agent major part broadly falls into the Organic substance of function groups, can biodegradation, no
Pollute environment, safe to the human body harmless, it is possible to form stable complex with the crome metal in rustless steel, thus ensure that metal is not
It is corroded.
4, the present invention does not contains hydrogen peroxide, and composition belongs to stable non-hazardous material, it is possible to ensure production technology and product
Stablize.Citric acid passivating solution of the prior art lacks the function cleaning rustless steel.It is known that stainless steel surfaces is oily
Dirty, residual oxide is formed with strong influence to passivating film.Passivating solution of the present invention processes while achieving pickling-passivation,
I.e. save processing step, in turn ensure that completelying form of passivating film.Passivator of the present invention need not especially complex equipment, blunt
Change liquid and also will not corrode other equipment and structure, store simple and convenient.
Accompanying drawing explanation
Fig. 1 is sample salt spray test figure after passivating solution of the present invention processes.
Fig. 2 is non-Passivation Treatment sample salt spray test figure.
Detailed description of the invention
In order to better illustrate the present invention, it is described further below in conjunction with detailed description of the invention.Examination used in the present invention
Agent or instrument all can be buied by market, and the detection method of use etc. is all known in the art, do not repeat them here.
Embodiment 1
A kind of citric acid cleaning passivator, comprises the following component of following mass percent:
Citric acid 40%, phytic acid 3%, if fourth 0.2%, triethylamine alcohol 0.2%, OP-10 20%, water 36.6%.
Dispensing according to the above ratio, is all stirred for 15-20 minute after charging i.e. obtaining citric acid cleaning of the present invention passivation
Agent.
Using above-mentioned passivator to be passivated 304 rustless steel samples processing, passivation time is 20min, passivation temperature 60
DEG C, take out rustless steel sample after passivation, clean up, be dried.
Embodiment 2
A kind of citric acid cleaning passivator, comprises the following component of following mass percent:
Citric acid 42%, sodium gluconate 4%, poly-aspartate 0.4%, triethylamine alcohol 0.4%, SG-20 22%, water
31.2%.
Dispensing according to the above ratio, is all stirred for 15-20 minute after charging i.e. obtaining citric acid cleaning of the present invention passivation
Agent.
Using above-mentioned passivator to be passivated 304 rustless steel samples processing, passivation time is 25min, passivation temperature 65
DEG C, take out rustless steel sample after passivation, clean up, be dried.
Embodiment 3
A kind of citric acid cleaning passivator, comprises the following component of following mass percent:
Citric acid 45%, aminotriacetic acid 8%, poly (sodium aspartate) 0.5%, triethylamine alcohol 0.5%, OP-13 25%,
Water 31%.
Dispensing according to the above ratio, is all stirred for 15-20 minute after charging i.e. obtaining citric acid cleaning of the present invention passivation
Agent.
Using above-mentioned passivator to be passivated 304 rustless steel samples processing, passivation time is 30min, passivation temperature 55
DEG C, take out rustless steel sample after passivation, clean up, be dried.
Effect example 1, salt spray test are tested
The passivator described in embodiment 1 and passivating method is used to be passivated 304 rustless steel samples, by 304 passivation for stainless steel examinations
Sample and be not passivated sample and carry out salt spray test simultaneously, uses molten as spraying of the sodium chloride salt aqueous solution of mass concentration 5%
Liquid, this sodium chloride brine pH value of solution is neutral range (pH value is 6-7), and test temperature is maintained at about 35 DEG C, rate of salt spray precipitation,
Between 1-2ml/80cm h.After processing 48 hours observe, result as depicted in figs. 1 and 2, unpassivated process rustless steel
Sample surfaces occurs in that corrosion pit, and still keeps the light on surface through the rustless steel sample of Passivation Treatment, does not sees corruption
Plaque point, after Passivation Treatment is described, 304 Corrosion of Stainless Steel performances are greatly improved.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that, for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a citric acid cleaning passivator, it is characterised in that comprise citric acid, chelating agent, corrosion inhibiter, pH buffer agent and surface
Activating agent.
Passivator the most according to claim 1, it is characterised in that comprise the following component of following mass fraction:
Passivator the most according to claim 2, it is characterised in that comprise the following component of following mass fraction:
Passivator the most according to claim 3, it is characterised in that comprise the following component of following mass fraction:
5. according to the passivator described in any one of claim 1-4, it is characterised in that described chelating agent is aminotriacetic acid, Portugal
The mixture of one or more in grape acid sodium, phytic acid.
6. according to the passivator described in any one of claim 1-4, it is characterised in that described corrosion inhibiter be poly-aspartate and
If the mixture of one or more in derivant fourth.
7. according to the passivator described in any one of claim 1-4, it is characterised in that described pH buffer agent is triethylamine alcohol.
8. according to the passivator described in any one of claim 1-4, it is characterised in that described surfactant is OP-10, OP-
13, the mixture of one or more in SG-20.
9. the passivating method of a citric acid cleaning passivator, it is characterised in that comprise the steps of and rustless steel sample is soaked
Being passivated in the citric acid cleaning passivator described in claim 1-8, passivation temperature is 50-70 DEG C, and passivation time is 15-
30min；Rustless steel sample is taken out after terminating by passivation, cleans and is dried.
Passivating method the most according to claim 9, it is characterised in that described passivation temperature is 65 DEG C, described passivation time
For 25min.
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| CN107502881A (en) * | 2017-08-03 | 2017-12-22 | 苏州吉利不锈钢制品有限公司 | A kind of environment-friendly type acid-washing stainless steel passivating solution and preparation method thereof |
| CN107457170A (en) * | 2017-08-31 | 2017-12-12 | 重庆卡勒斯通科技有限公司 | A kind of processing method of heating and ventilating pipeline |
| CN108359998A (en) * | 2018-02-06 | 2018-08-03 | 上海神洲阳光特种钢管有限公司 | A kind of environment protection type corrosion resistant precision cold-rolled stainless steel tube aftertreatment technology |
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| CN108864879A (en) * | 2018-05-17 | 2018-11-23 | 连云港隆和矿产有限公司 | A kind of ship derusting by sandblasting method |
| CN109055945A (en) * | 2018-08-06 | 2018-12-21 | 北京中科创新科技发展中心 | A kind of novel environment friendly deoils the scavenging solution and preparation method thereof that derusts |
| CN109371407A (en) * | 2018-11-27 | 2019-02-22 | 江苏省徐州华泰工具有限责任公司 | A kind of cleaning solution of hardware tool |
| CN111926338A (en) * | 2020-07-14 | 2020-11-13 | 苏州绿水清洗科技有限公司 | Stainless steel cleaning passivator and application thereof |
| CN111962082A (en) * | 2020-08-11 | 2020-11-20 | 湖北工程学院 | A kind of green and environment-friendly copper foil anti-oxidant and anti-oxidation process using the same |
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| CN112342537A (en) * | 2020-10-16 | 2021-02-09 | 惠州市佳一美金属表面处理材料有限公司 | Neutral environment-friendly stainless steel passivator and preparation method thereof |
| CN114381774A (en) * | 2020-10-22 | 2022-04-22 | 海安南京大学高新技术研究院 | A kind of preparation method of NdFeB magnet alloy coating |
| CN114381774B (en) * | 2020-10-22 | 2023-12-29 | 海安南京大学高新技术研究院 | Preparation method of neodymium-iron-boron magnet alloy coating |
| CN112647071A (en) * | 2020-11-24 | 2021-04-13 | 东莞领杰金属精密制造科技有限公司 | Passivation method of stainless steel vapor chamber |
| CN113025445A (en) * | 2021-03-25 | 2021-06-25 | 中核四川环保工程有限责任公司 | Cleaning agent for cleaning high-temperature sintered metal filter |
| CN114427097A (en) * | 2022-02-25 | 2022-05-03 | 沈阳永清环保科技有限公司 | Citric acid copper alloy pickling solution and preparation method thereof |
| CN114645280A (en) * | 2022-03-28 | 2022-06-21 | 深圳市铨天科技有限公司 | BGA substrate bonding wire golden finger cleaning agent and cleaning method |
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