CN104313602B - The water electrolysis polar board surface processing method of diaphragm can be formed at polar board surface - Google Patents
The water electrolysis polar board surface processing method of diaphragm can be formed at polar board surface Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 16
- 238000003672 processing method Methods 0.000 title claims abstract description 12
- 238000005260 corrosion Methods 0.000 claims abstract description 42
- 230000007797 corrosion Effects 0.000 claims abstract description 42
- 239000002253 acid Substances 0.000 claims abstract description 26
- 239000003518 caustics Substances 0.000 claims abstract description 18
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910001431 copper ion Inorganic materials 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 14
- 238000005530 etching Methods 0.000 claims abstract description 14
- 239000010962 carbon steel Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 12
- KBIWNQVZKHSHTI-UHFFFAOYSA-N 4-n,4-n-dimethylbenzene-1,4-diamine;oxalic acid Chemical compound OC(=O)C(O)=O.CN(C)C1=CC=C(N)C=C1 KBIWNQVZKHSHTI-UHFFFAOYSA-N 0.000 claims abstract description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Natural products OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 10
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 10
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 235000010344 sodium nitrate Nutrition 0.000 claims description 5
- 239000004317 sodium nitrate Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- YLIMHFXLIKETBC-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCC[Na] YLIMHFXLIKETBC-UHFFFAOYSA-N 0.000 claims description 3
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims description 3
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 3
- 239000000243 solution Substances 0.000 description 52
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 28
- 238000000034 method Methods 0.000 description 14
- 229910052759 nickel Inorganic materials 0.000 description 14
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 239000008139 complexing agent Substances 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 238000007747 plating Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005342 ion exchange Methods 0.000 description 3
- -1 iron ion Chemical class 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- CYDQOEWLBCCFJZ-UHFFFAOYSA-N 4-(4-fluorophenyl)oxane-4-carboxylic acid Chemical compound C=1C=C(F)C=CC=1C1(C(=O)O)CCOCC1 CYDQOEWLBCCFJZ-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003002 pH adjusting agent Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000001509 sodium citrate Substances 0.000 description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 2
- 239000001540 sodium lactate Substances 0.000 description 2
- 229940005581 sodium lactate Drugs 0.000 description 2
- 235000011088 sodium lactate Nutrition 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- Electroplating Methods And Accessories (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The present invention relates to a kind of water electrolysis polar board surface processing method, concrete steps include: the polar board surface of carbon steel material is cleaned by A.；B. pole plate is immersed in 8min in the acid etching solution that temperature is 55 DEG C；The nitric acid that composition is 15wt% of described pre-etching solution, the ethanedioic acid of 3wt%, remaining is water；C. pole plate is immersed in 5min in the copper ion solution that temperature is 40 DEG C；D. pole plate is immersed in 8min in the caustic corrosion solution that temperature is 40 DEG C；E. pole plate is put in the strong acid solution of normal temperature and stir, remove the impurity of polar board surface；F., pole plate immersing 12min in the treatment fluid of 35 DEG C, rinses with clear water and dry after taking-up, polar board surface forms corrosion-resisting protective film.
Description
The application is divisional application, the invention and created name of original application: water electrolysis polar board surface processing method, application number: 201210538399.X, the applying date: 2012-12-13。
Technical field
The present invention relates to a kind of surface to carbon steel pole plate carry out corrosion treatmentCorrosion Science and form the process of diaphragm, belong to field of metal surface treatment technology.
Background technology
Water electrolysis is to make water decomposite hydrogen or oxygen under galvanic effect.In a whole set of water electrolysis equipment, electrolytic cell is one of its most crucial device.Industrial conventional water electrolyser is laminated by rule by dozens of to up to a hundred electrolytic chamber as required and constitutes.Each electrolytic chamber is made up of positive plate, oxygen catalysis electrode, choke barrier film, insulated enclosure pad, hydrogen catalysis electrode, minus plate etc..Positive plate and minus plate generally use carbon steel steel plate to make.
Owing to the electrolyte of Strong acidic electrolyte composition has strong corrosivity to metal, so the electrolyte of the electrolytic cell potassium hydroxide that typically uses concentration to be 25% to 30% or sodium hydroxide solution.Under the effect of electric field, potassium ion or sodium ion move to negative pole, and hydroxide ion moves to positive pole, thus separate out hydrogen and oxygen.In order to reduce overpotential, reducing power consumption, the operating temperature of electrolytic cell is generally 85 DEG C to 90 DEG C.Carbon steel steel plate is easily caused alkaline etching by such alkali concn and temperature, so positive plate and minus plate must be carried out preservative treatment.Owing to the caustic corrosion resistance performance of pure nickel is the most excellent, at present, water electrolysis industry generally uses the carbon steel steel plate cathode-anode plate as water electrolyser of nickel plating.
Show, owing to the carbon steel pole plate of nickel plating actually and can not be completely coated with by plated nickel dam, nickel coating inevitably has micropore according to result of study.In pole plate is in the electrolyte that harmful ion is formed, these harmful ions can enter in the micropore of nickel coating, and is enriched with in micropore, with iron ion generation hydrolysis, forms the acid that corrosivity is extremely strong, persistently corrodes pole plate.Additionally, due to nickel coating is the coating of a kind of cathodic, the standard electrode potential of nickel is-0.25V, and the standard electrode potential of iron is-0.44V, and nickel coating and plain steel can form a pair galvanic couple, and electrochemical reaction will occur in they are simultaneously exposed to electrolyte.Iron in micropore is anode, loses electronics and is dissolved；Nickel outside is negative electrode, obtains electronics, and water electrolysis is released hydrogen.It follows that the possibility that the nickel plating carbon steel pole plate using general technology to make is corroded is very big.Once pole plate occurs that serious corrosion can cause hydrogen or oxygen gas to be gone here and there mutually, leak alkali and electrical short, it is more likely that set off an explosion, and threatens personnel and the safety of equipment.
Summary of the invention
The technical problem to be solved in the present invention is, proposes a kind of surface to carbon steel pole plate and carries out corrosion treatmentCorrosion Science and form diaphragm, can be effectively improved the water electrolysis polar board surface processing method of the corrosion resistance after pole plate nickel plating.
The present invention solves that the technical scheme that above-mentioned technical problem proposes is: a kind of water electrolysis polar board surface processing method, comprise the following steps:
A. the polar board surface of carbon steel material is cleaned；
B. pole plate being immersed in 5min to 15min in acid etching solution, polar board surface carries out acid corrosion, the composition of described acid etching solution is the nitric acid of 8wt% to 15wt%, the ethanedioic acid of 2wt% to 8wt%, and remaining is water；
C. pole plate is immersed in 3min to 8min in copper ion solution, iron and copper ion generation displacement reaction；
D., pole plate being immersed in 5min to 15min in caustic corrosion solution, polar board surface carries out caustic corrosion, described caustic corrosion solution is mixed by the sodium hydroxide solution of 10g/L to 30g/L and the sodium nitrate solution of 10g/L to 30g/L；
E. pole plate is put in the strong acid solution that concentration is more than or equal to 30%, remove the impurity of polar board surface；
F. pole plate is immersed in 10min to 20min in treatment fluid; diaphragm is formed at polar board surface; the composition of described treatment fluid is the complexon I of 5wt% to 12wt%; the complexing agent of 0.5wt% to 3wt%; the corrosion inhibiter of 0.2wt% to 2wt%; the surfactant of 0.1wt% to 0.5wt, the pH adjusting agent of 0.02wt% to 2wt%, remaining is water；The pH value of described treatment fluid is 3 to 6.
Above-mentioned complexing agent is one or more in sodium citrate, sodium lactate, natrium malicum.
Above-mentioned corrosion inhibiter is one or more in BTA, KI, methylbenzotrazole.
Above-mentioned surfactant is one or more in lauryl sodium sulfate, neopelex or n-octyl sodium sulphate.
Above-mentioned pH adjusting agent is one or both in triethanolamine, triethylamine.
Above-mentioned copper ion solution is copper-bath or the copper chloride solution of 150mg/L to 500mg/L.
Above-mentioned strong acid solution be temperature be salpeter solution, hydrochloric acid solution or the sulfuric acid solution of 25 DEG C to 50 DEG C.
The temperature of above-mentioned acid etching solution is 40 DEG C to 60 DEG C, and the temperature of described copper ion solution is 30 DEG C to 45 DEG C, and the temperature of described caustic corrosion solution is 30 DEG C to 45 DEG C.
The temperature of above-mentioned treatment fluid is 25 DEG C to 45 DEG C, and pole plate rinses with clear water after taking out from treatment fluid and dries, and drying temperature is 80 DEG C to 150 DEG C.
The present invention has positive effect: the water electrolysis polar board surface processing method of the present invention is first pole plate to be carried out corrosion treatmentCorrosion Science; diaphragm is formed again at polar board surface; corrosion treatmentCorrosion Science makes the micropore that the Surface Creation of pole plate is tiny, and surface becomes coarse, and beneficially diaphragm is preferably compounded on pole plate.During corrosion treatmentCorrosion Science; first carry out sour corrosion and generate micropore at polar board surface; carry out alkaline corrosion again in polar board surface and micropore, generate more tiny micropore; so that micropore is positioned at the position of deeper; the partial alkaline corrosive effect that displacement reaction occurs is more weak; so that the distribution of micropore more disperses, be conducive to increasing roughness, improve the composite effect of diaphragm.Treatment fluid, using complexon I as main component, using complexing agent, corrosion inhibiter, surfactant as auxiliary element, can form the diaphragm of densification, be effectively isolated iron and contact with nickel coating, effectively promote the corrosion resistance of pole plate on the surface of pole plate.Complexon I is made two by three carboxyls by respective oxygen and nitrogen can form complex compound with iron ion coordinating to four-coordination, and sequestering power is extremely strong；Addition complexing agent and corrosion inhibiter can improve the corrosion resistance of diaphragm further, and addition surfactant can significantly improve the surface tension of diaphragm and make pole plate diaphragm finer and close.The treatment fluid of the present invention does not use passivator, uses complexing agent, corrosion inhibiter the most too much, but use complexon I with low cost in a large number, production cost can be substantially reduced, be with a wide range of applications on the premise of ensureing quality of forming film.
Detailed description of the invention
Embodiment 1
The water electrolysis polar board surface processing method of the present embodiment, specifically comprises the following steps that
A. the polar board surface of carbon steel material is cleaned: sequentially pass through oil removing, washing, pickling process, will be attached to the greasy dirt of polar board surface, dust, corrosion etc. and remove.
B. polar board surface is carried out acid corrosion process.Pole plate being immersed in 10min in the acid etching solution that temperature is 60 DEG C so that polar board surface is tentatively corroded, form small pit, the diameter of pit is less than 10 μm.The composition of described acid etching solution is the nitric acid of 10wt%, the ethanedioic acid of 5wt%, and remaining is water.
C. polar board surface is carried out ion exchange process.Pole plate is immersed in 5min in the copper ion solution that temperature is 40 DEG C so that the part iron in polar board surface and pit and copper ion generation displacement reaction, separates out copper.Described copper ion solution is the copper-bath of 250mg/L.
D. polar board surface is carried out caustic corrosion process.Pole plate is immersed in 10min in the caustic corrosion solution that temperature is 30 DEG C so that in polar board surface and pit, form more more tiny pits.Described caustic corrosion solution is mixed by the sodium hydroxide solution of 20g/L and the sodium nitrate solution of 20g/L.
E. polar board surface is carried out de-sludging process.Pole plate is put in the strong acid solution of normal temperature and stir, remove the impurity of polar board surface, be then rinsed with clear water.Described strong acid solution be concentration be the salpeter solution of 30%.
F., pole plate immersing 15min in the treatment fluid of 40 DEG C, rinses with clear water and dry after taking-up, drying temperature is 90 DEG C.Polar board surface forms corrosion-resisting protective film.The composition of described treatment fluid is: the complexon I of 10wt%, the sodium citrate of 3wt%, the BTA of 1wt%, the lauryl sodium sulfate of 0.3wt%, and remaining is water, is 3 by triethanolamine regulation pH value.
Embodiment 2
The water electrolysis polar board surface processing method of the present embodiment, specifically comprises the following steps that
A. the polar board surface of carbon steel material is cleaned: sequentially pass through oil removing, washing, pickling process, will be attached to the greasy dirt of polar board surface, dust, corrosion etc. and remove.
B. polar board surface is carried out acid corrosion process.Pole plate is immersed in 15min in the acid etching solution that temperature is 50 DEG C.The nitric acid that composition is 8wt% of described pre-etching solution, the ethanedioic acid of 8wt%, remaining is water.
C. polar board surface is carried out ion exchange process.Pole plate is immersed in 8min in the copper ion solution that temperature is 40 DEG C so that the part iron in polar board surface and pit and copper ion generation displacement reaction, separates out copper.Described copper ion solution is the copper-bath of 200mg/L.
D. polar board surface is carried out caustic corrosion process.Pole plate is immersed in 5min in the caustic corrosion solution that temperature is 35 DEG C so that in polar board surface and pit, form more more tiny pits.Described caustic corrosion solution is mixed by the sodium hydroxide solution of 10g/L and the sodium nitrate solution of 30g/L.
E. polar board surface is carried out de-sludging process.Pole plate is put in the strong acid solution that temperature is 40 DEG C and stir, remove the impurity of polar board surface, be then rinsed with clear water.Described strong acid solution be concentration be the hydrochloric acid solution of 40%.
F., pole plate immersing 20min in the treatment fluid of 25 DEG C, rinses with clear water and dry after taking-up, drying temperature is 80 DEG C.Polar board surface forms corrosion-resisting protective film.The composition of described treatment fluid is: the complexon I of 8wt%, the sodium lactate of 1wt%, the KI of 0.5wt%, the neopelex of 0.2wt%, and remaining is water, is 4.5 by triethylamine regulation pH value.
Embodiment 3
The water electrolysis polar board surface processing method of the present embodiment, specifically comprises the following steps that
A. the polar board surface of carbon steel material is cleaned: sequentially pass through oil removing, washing, pickling process, will be attached to the greasy dirt of polar board surface, dust, corrosion etc. and remove.
B. polar board surface is carried out acid corrosion process.Pole plate is immersed in 8min in the acid etching solution that temperature is 55 DEG C.The nitric acid that composition is 15wt% of described pre-etching solution, the ethanedioic acid of 3wt%, remaining is water.
C. polar board surface is carried out ion exchange process.Pole plate is immersed in 5min in the copper ion solution that temperature is 40 DEG C so that the part iron in polar board surface and pit and copper ion generation displacement reaction, separates out copper.Described solion is the copper chloride solution of 300mg/L.
D. polar board surface is carried out caustic corrosion process.Pole plate is immersed in 8min in the caustic corrosion solution that temperature is 40 DEG C so that in polar board surface and pit, form more more tiny pits.Described caustic corrosion solution is mixed by the sodium hydroxide solution of 30g/L and the sodium nitrate solution of 15g/L.
E. polar board surface is carried out de-sludging process.Pole plate is put in the strong acid solution of normal temperature and stir, remove the impurity of polar board surface, be then rinsed with clear water.Described strong acid solution be concentration be the salpeter solution of 40%.
F., pole plate immersing 12min in the treatment fluid of 35 DEG C, rinses with clear water and dry after taking-up, drying temperature is 120 DEG C.Polar board surface forms corrosion-resisting protective film.The composition of described treatment fluid is: the complexon I of 12wt%, the natrium malicum of 2wt%, the methylbenzotrazole of 0.5wt%, the n-octyl sodium sulphate of 0.2wt%, and remaining is water, is 4 by triethanolamine regulation pH value.
Use common process to carry out nickel plating on the pole plate of the water electrolysis polar board surface processing method through embodiment 1 to 3, then carry out salt spray test.Sample being put into salt spray test chamber, uses the NaCl solution of 5%, humidity is 70%, and temperature is 50 DEG C, and persistently spray every day 8h, and continuous 10 days, polar board surface was without obvious corrosion phenomenon.
Claims (1)
1. a water electrolysis polar board surface processing method, comprises the following steps that
A. the polar board surface of carbon steel material is cleaned；
B. pole plate is immersed in 8min in the acid etching solution that temperature is 55 DEG C；The composition of described acid etching solution is the nitric acid of 15wt%, the ethanedioic acid of 3wt%, and remaining is water；
C. pole plate is immersed in 5min in the copper ion solution that temperature is 40 DEG C so that the part iron in polar board surface and pit and copper ion generation displacement reaction, separates out copper；Described copper ion solution is the copper chloride solution of 300mg/L；
D. pole plate is immersed in 8min in the caustic corrosion solution that temperature is 40 DEG C, polar board surface is carried out caustic corrosion；Described caustic corrosion solution is mixed by the sodium hydroxide solution of 30g/L and the sodium nitrate solution of 15g/L；
E. pole plate is put in the strong acid solution of normal temperature and stir, remove the impurity of polar board surface, be then rinsed with clear water；Described strong acid solution be concentration be the salpeter solution of 40%；
F., pole plate immersing 12min in the treatment fluid of 35 DEG C, rinses with clear water and dry after taking-up, polar board surface forms corrosion-resisting protective film；The composition of described treatment fluid is: the complexon I of 12wt%, the natrium malicum of 2wt%, the methylbenzotrazole of 0.5wt%, the n-octyl sodium sulphate of 0.2wt%, and remaining is water, is 4 by triethanolamine regulation pH value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410673616.5A CN104313602B (en) | 2012-12-13 | 2012-12-13 | The water electrolysis polar board surface processing method of diaphragm can be formed at polar board surface |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410673616.5A CN104313602B (en) | 2012-12-13 | 2012-12-13 | The water electrolysis polar board surface processing method of diaphragm can be formed at polar board surface |
| CN201210538399.XA CN103088350B (en) | 2012-12-13 | 2012-12-13 | Water electrolysis pole plate surface treatment method |
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| CN201210538399.XA Division CN103088350B (en) | 2012-12-13 | 2012-12-13 | Water electrolysis pole plate surface treatment method |
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| JPS61276982A (en) * | 1985-05-30 | 1986-12-06 | Nec Corp | Plating method for magnesium alloy |
| JP3192003B2 (en) * | 1992-10-02 | 2001-07-23 | 三井金属鉱業株式会社 | High corrosion resistance coating method for magne-based alloy |
| CN100398700C (en) * | 2004-06-24 | 2008-07-02 | 侯文清 | Surface cladding treatment of ferro-manganese aluminium alloy |
| CN100408725C (en) * | 2005-12-30 | 2008-08-06 | 东北大学 | Process for compound surface sheilding of metal magnesium and magnesium alloy |
| CN102021552A (en) * | 2009-09-21 | 2011-04-20 | 邵阳市创捷化工有限公司 | Modifier for black metal surface matrix and production method thereof |
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