CN104313602A - Water electrolysis pole plate surface processing method with protective film forming on surface of pole plate - Google Patents
Water electrolysis pole plate surface processing method with protective film forming on surface of pole plate Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 230000001681 protective effect Effects 0.000 title claims abstract description 17
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 16
- 238000003672 processing method Methods 0.000 title abstract description 3
- 238000005260 corrosion Methods 0.000 claims abstract description 36
- 230000007797 corrosion Effects 0.000 claims abstract description 35
- 239000002253 acid Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 24
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 18
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 14
- 239000010962 carbon steel Substances 0.000 claims abstract description 13
- 229910001431 copper ion Inorganic materials 0.000 claims abstract description 10
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 6
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 6
- 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
- 239000003518 caustics Substances 0.000 claims description 17
- 238000005530 etching Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 238000004381 surface treatment Methods 0.000 claims description 11
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000005649 metathesis reaction Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 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
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 229960004418 trolamine Drugs 0.000 claims description 4
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 claims description 3
- 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
- WPUMTJGUQUYPIV-JIZZDEOASA-L disodium (S)-malate Chemical compound [Na+].[Na+].[O-]C(=O)[C@@H](O)CC([O-])=O WPUMTJGUQUYPIV-JIZZDEOASA-L 0.000 claims description 3
- 235000019265 sodium DL-malate Nutrition 0.000 claims description 3
- 239000001394 sodium malate Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 abstract description 3
- 230000003750 conditioning effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 235000015250 liver sausages Nutrition 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 62
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 28
- 229910052759 nickel Inorganic materials 0.000 description 14
- 239000012528 membrane Substances 0.000 description 11
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 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
- 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
- 239000013543 active substance Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000008151 electrolyte solution Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 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
- 230000003628 erosive effect Effects 0.000 description 3
- 238000005342 ion exchange Methods 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- 239000004141 Sodium laurylsulphate Substances 0.000 description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 2
- 239000012964 benzotriazole Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 229960003280 cupric chloride Drugs 0.000 description 2
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- -1 iron ion 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
- 229960004839 potassium iodide Drugs 0.000 description 2
- 235000007715 potassium iodide Nutrition 0.000 description 2
- 239000001509 sodium citrate Substances 0.000 description 2
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 2
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 2
- NGSFWBMYFKHRBD-UHFFFAOYSA-N sodium;2-hydroxypropanoic acid Chemical compound [Na+].CC(O)C(O)=O NGSFWBMYFKHRBD-UHFFFAOYSA-N 0.000 description 2
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 2
- 229940038773 trisodium citrate Drugs 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
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 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
- 239000003792 electrolyte Substances 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000004880 explosion Methods 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
- 239000002481 rotproofing Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to a water electrolysis pole plate surface processing method. The method comprises the specific steps that A, the surface of a pole plate made of carbon steel is cleaned; B, the pole plate is soaked in an acid corrosion solution with the temperature of 55 DEG C for 8 min, wherein the acid corrosion solution comprises, by weight, 15% of nitric acid, 3% of oxalic acid, and the balance water; C, the pole plate is soaked in a copper ion solution with the temperature of 40 DEG C for 5 min; D, the pole plate is soaked in an alkali corrosion solution with the temperature of 40 DEG C for 8 min; E, the pole pate is placed in a strong acid solution with the room temperature to be stirred, and impurities on the surface of the pole plate are removed; F, the pole plate is soaked in a conditioning fluid with the temperature of 35 DEG C for 12 min, the pole plate is flushed with clean water and dried after being taken out, and an anti-corrosion protective film is formed on the surface of the pole plate.
Description
The application is divisional application, the invention and created name of original application: water electrolysis polar board surface treatment process, 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 and carry out corrosion treatment and the processing method forming protective membrane, belong to field of metal surface treatment technology.
Background technology
Water electrolysis makes water decomposite hydrogen or oxygen under galvanic effect.In a whole set of water electrolysis equipment, electrolyzer is one of its most crucial device.Industrial conventional water electrolyzer regularly to be laminated to up to a hundred electrolytic chamber by dozens of as required and forms.Each electrolytic chamber is made up of positive plate, oxygen catalysis electrode, choke barrier film, insulated enclosure pad, hydrogen catalysis electrode, negative plate etc.Positive plate and negative plate adopt carbon steel steel plate to make usually.
Due to Strong acidic electrolyte composition electrolytic solution to metal, there is strong corrodibility, so the electrolytic solution of electrolyzer generally adopt concentration be 25% to 30% potassium hydroxide 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, reduce power consumption, the working temperature of electrolyzer is generally 85 DEG C to 90 DEG C.Such alkali concn and temperature very easily cause alkaline etching to carbon steel steel plate, so antianode plate and negative plate must carry out rotproofing.Because the caustic corrosion resistance performance of pure nickel is very excellent, at present, water electrolysis industry adopts the cathode-anode plate of carbon steel steel plate as water electrolyzer of nickel plating usually.
According to result of study display, due to nickel plating carbon steel pole plate in fact and can not plated nickel dam fully coated, nickel layer inevitably has micropore.When pole plate is in the electrolytic solution of harmful ion formation, these harmful ions can enter in the micropore of nickel layer, and enrichment in micropore, with iron ion generation hydrolysis reaction, form the acid that corrodibility is extremely strong, continue to corrode pole plate.In addition, because nickel layer is a kind of coating of cathodic, the standard potential of nickel is-0.25V, and the standard potential of iron is-0.44V, and nickel layer and plain steel can form a pair galvanic couple, electrochemical reaction will occur in the electrolytic solution when they expose simultaneously.Iron in micropore is anode, loses electronics and is dissolved; Nickel is outside negative electrode, obtains electronics, and water electrolysis is released hydrogen.It can thus be appreciated that the possibility that the nickel plating carbon steel pole plate adopting 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, probably set off an explosion, threaten the safety of personnel and 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 treatment and form protective membrane, effectively can improve the water electrolysis polar board surface treatment process of the erosion resistance after pole plate nickel plating.
The present invention is the technical scheme solving the problems of the technologies described above proposition: a kind of water electrolysis polar board surface treatment process, comprises the following steps:
A. the polar board surface of carbon steel material is cleaned;
B. pole plate is immersed in 5min to 15min in acid etching solution, carries out acid corrosion to polar board surface, the composition of described acid etching solution is the oxalic acid of the nitric acid of 8wt% to 15wt%, 2wt% to 8wt%, and all the other are water;
C. pole plate is immersed in 3min to 8min in copper ion solution, iron and cupric ion generation replacement(metathesis)reaction;
D. pole plate is immersed in 5min to 15min in caustic corrosion solution, carries out caustic corrosion to polar board surface, 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 into 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 solution, protective membrane is formed at polar board surface, the composition of described treatment solution is the complexon I of 5wt% to 12wt%, the complexing agent of 0.5wt% to 3wt%, the inhibiter of 0.2wt% to 2wt%, the tensio-active agent of 0.1wt% to 0.5wt, the pH adjusting agent of 0.02wt% to 2wt%, all the other are water; The pH value of described treatment solution is 3 to 6.
Above-mentioned complexing agent is one or more in Trisodium Citrate, Sodium.alpha.-hydroxypropionate, sodium malate.
Above-mentioned inhibiter is one or more in benzotriazole, potassiumiodide, Methylbenzotriazole.
Above-mentioned tensio-active agent is one or more in sodium lauryl sulphate, Sodium dodecylbenzene sulfonate or n-octyl sodium sulfate.
Above-mentioned pH adjusting agent is one or both in trolamine, triethylamine.
Above-mentioned copper ion solution is copper-bath or the Cupric Chloride Solution of 150mg/L to 500mg/L.
Above-mentioned strong acid solution to be temperature be 25 DEG C to 50 DEG C salpeter solution, hydrochloric acid soln or sulphuric acid soln.
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 solution is 25 DEG C to 45 DEG C, rinses and dry after pole plate takes out from treatment solution with clear water, and bake out temperature is 80 DEG C to 150 DEG C.
The present invention has positive effect: water electrolysis polar board surface treatment process of the present invention first carries out corrosion treatment to pole plate; protective membrane is formed again at polar board surface; corrosion treatment makes the micropore that the Surface Creation of pole plate is tiny; surface becomes coarse, is conducive to protective membrane and is compounded in better on pole plate.During corrosion treatment; first carry out acid attack and generate micropore at polar board surface; carry out alkaline corrosion again and generate more tiny micropore in polar board surface and micropore; thus make micropore be positioned at the position of more deep layer; the partial alkaline corrosive effect that replacement(metathesis)reaction occurs is more weak; thus the distribution of micropore is disperseed more, be conducive to increasing roughness, improve the composite effect of protective membrane.Treatment solution, using complexon I as main component, using complexing agent, inhibiter, tensio-active agent as ancillary component, can form fine and close protective membrane on the surface of pole plate, effectively isolate iron and contact with nickel layer, effectively promote the erosion resistance of pole plate.Complexon I does 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; Add the erosion resistance that complexing agent and inhibiter can improve protective membrane further, add the surface tension that tensio-active agent can significantly improve protective membrane and make pole plate protective membrane finer and close.Do not adopt passivator in treatment solution of the present invention, adopt complexing agent, inhibiter with exceeding, but the complexon I that a large amount of employing is with low cost, under the prerequisite ensureing quality of forming film, greatly can reduce production cost, be with a wide range of applications.
Embodiment
Embodiment 1
The water electrolysis polar board surface treatment process of the present embodiment, concrete steps are as follows:
A. the polar board surface of carbon steel material is cleaned: successively through oil removing, washing, pickling process, will the removing such as greasy dirt, dust, corrosion of polar board surface be attached to.
B. acid corrosion process is carried out to polar board surface.Pole plate being immersed in temperature is 10min in the acid etching solution of 60 DEG C, polar board surface is tentatively corroded, forms small pit, and the diameter of pit is less than 10 μm.The composition of described acid etching solution is the oxalic acid of the nitric acid of 10wt%, 5wt%, and all the other are water.
C. ion exchange process is carried out to polar board surface.Pole plate being immersed in temperature is 5min in the copper ion solution of 40 DEG C, makes the part iron in polar board surface and pit and cupric ion generation replacement(metathesis)reaction, separates out copper.Described copper ion solution is the copper-bath of 250mg/L.
D. caustic corrosion process is carried out to polar board surface.Pole plate being immersed in temperature is 10min in the caustic corrosion solution of 30 DEG C, makes to form more more tiny pits in polar board surface and pit.Described caustic corrosion solution is mixed by the sodium hydroxide solution of 20g/L and the sodium nitrate solution of 20g/L.
E. de-sludging process is carried out to polar board surface.Strong acid solution pole plate being put into normal temperature stirs, and removes the impurity of polar board surface, then rinses with clear water.Described strong acid solution to be concentration be 30% salpeter solution.
F. pole plate is immersed 15min in the treatment solution of 40 DEG C, rinse and dry after taking-up with clear water, bake out temperature is 90 DEG C.Polar board surface forms corrosion-resisting protective film.The composition of described treatment solution is: the complexon I of 10wt%, the Trisodium Citrate of 3wt%, the benzotriazole of 1wt%, the sodium lauryl sulphate of 0.3wt%, and all the other are water, is 3 by trolamine adjust ph.
Embodiment 2
The water electrolysis polar board surface treatment process of the present embodiment, concrete steps are as follows:
A. the polar board surface of carbon steel material is cleaned: successively through oil removing, washing, pickling process, will the removing such as greasy dirt, dust, corrosion of polar board surface be attached to.
B. acid corrosion process is carried out to polar board surface.Pole plate being immersed in temperature is 15min in the acid etching solution of 50 DEG C.The composition of described pre-etching solution is the oxalic acid of the nitric acid of 8wt%, 8wt%, and all the other are water.
C. ion exchange process is carried out to polar board surface.Pole plate being immersed in temperature is 8min in the copper ion solution of 40 DEG C, makes the part iron in polar board surface and pit and cupric ion generation replacement(metathesis)reaction, separates out copper.Described copper ion solution is the copper-bath of 200mg/L.
D. caustic corrosion process is carried out to polar board surface.Pole plate being immersed in temperature is 5min in the caustic corrosion solution of 35 DEG C, makes to form more more tiny pits in polar board surface and pit.Described caustic corrosion solution is mixed by the sodium hydroxide solution of 10g/L and the sodium nitrate solution of 30g/L.
E. de-sludging process is carried out to polar board surface.Pole plate being put into temperature is that the strong acid solution of 40 DEG C stirs, and removes the impurity of polar board surface, then rinses with clear water.Described strong acid solution to be concentration be 40% hydrochloric acid soln.
F. pole plate is immersed 20min in the treatment solution of 25 DEG C, rinse and dry after taking-up with clear water, bake out temperature is 80 DEG C.Polar board surface forms corrosion-resisting protective film.The composition of described treatment solution is: the complexon I of 8wt%, the Sodium.alpha.-hydroxypropionate of 1wt%, the potassiumiodide of 0.5wt%, the Sodium dodecylbenzene sulfonate of 0.2wt%, and all the other are water, is 4.5 by triethylamine adjust ph.
Embodiment 3
The water electrolysis polar board surface treatment process of the present embodiment, concrete steps are as follows:
A. the polar board surface of carbon steel material is cleaned: successively through oil removing, washing, pickling process, will the removing such as greasy dirt, dust, corrosion of polar board surface be attached to.
B. acid corrosion process is carried out to polar board surface.Pole plate being immersed in temperature is 8min in the acid etching solution of 55 DEG C.The composition of described pre-etching solution is the oxalic acid of the nitric acid of 15wt%, 3wt%, and all the other are water.
C. ion exchange process is carried out to polar board surface.Pole plate being immersed in temperature is 5min in the copper ion solution of 40 DEG C, makes the part iron in polar board surface and pit and cupric ion generation replacement(metathesis)reaction, separates out copper.Described solion is the Cupric Chloride Solution of 300mg/L.
D. caustic corrosion process is carried out to polar board surface.Pole plate being immersed in temperature is 8min in the caustic corrosion solution of 40 DEG C, makes to form more more tiny pits in polar board surface and pit.Described caustic corrosion solution is mixed by the sodium hydroxide solution of 30g/L and the sodium nitrate solution of 15g/L.
E. de-sludging process is carried out to polar board surface.Strong acid solution pole plate being put into normal temperature stirs, and removes the impurity of polar board surface, then rinses with clear water.Described strong acid solution to be concentration be 40% salpeter solution.
F. pole plate is immersed 12min in the treatment solution of 35 DEG C, rinse and dry after taking-up with clear water, bake out temperature is 120 DEG C.Polar board surface forms corrosion-resisting protective film.The composition of described treatment solution is: the complexon I of 12wt%, the sodium malate of 2wt%, the Methylbenzotriazole of 0.5wt%, the n-octyl sodium sulfate of 0.2wt%, and all the other are water, is 4 by trolamine adjust ph.
Adopt common process to carry out nickel plating to the pole plate of the water electrolysis polar board surface treatment process through embodiment 1 to 3, then carry out SaltSprayTest.Sample is put into salt-spray cabinet, and adopt the NaCl solution of 5%, humidity is 70%, and temperature is 50 DEG C, and continue spraying 8h every day, continuous 10 days, polar board surface was without obvious corrosion phenomenon.
Claims (1)
1. a water electrolysis polar board surface treatment process, comprises step as follows:
A. the polar board surface of carbon steel material is cleaned;
B. pole plate being immersed in temperature is 8min in the acid etching solution of 55 DEG C; The composition of described pre-etching solution is the oxalic acid of the nitric acid of 15wt%, 3wt%, and all the other are water;
C. pole plate being immersed in temperature is 5min in the copper ion solution of 40 DEG C, makes the part iron in polar board surface and pit and cupric ion generation replacement(metathesis)reaction, separates out copper;
D. pole plate being immersed in temperature is 8min in the caustic corrosion solution of 40 DEG C, carries out caustic corrosion to polar board surface; Described caustic corrosion solution is mixed by the sodium hydroxide solution of 30g/L and the sodium nitrate solution of 15g/L;
E. strong acid solution pole plate being put into normal temperature stirs, and removes the impurity of polar board surface, then rinses with clear water; Described strong acid solution to be concentration be 40% salpeter solution;
F. pole plate is immersed 12min in the treatment solution of 35 DEG C, rinse and dry after taking-up with clear water, polar board surface forms corrosion-resisting protective film; The composition of described treatment solution is: the complexon I of 12wt%, the sodium malate of 2wt%, the Methylbenzotriazole of 0.5wt%, the n-octyl sodium sulfate of 0.2wt%, and all the other are water, is 4 by trolamine adjust ph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210538399.XA Division CN103088350B (en) | 2012-12-13 | 2012-12-13 | Water electrolysis pole plate surface treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104313602A true CN104313602A (en) | 2015-01-28 |
| CN104313602B CN104313602B (en) | 2016-08-24 |
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| JPS61276982A (en) * | 1985-05-30 | 1986-12-06 | Nec Corp | Plating method for magnesium alloy |
| JPH06116734A (en) * | 1992-10-02 | 1994-04-26 | Mitsui Mining & Smelting Co Ltd | Highly corrosion resistant coating method of magnesium-base alloy |
| CN1712573A (en) * | 2004-06-24 | 2005-12-28 | 侯文清 | Surface cladding treatment of ferro-manganese aluminium alloy |
| CN1793425A (en) * | 2005-12-30 | 2006-06-28 | 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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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61276982A (en) * | 1985-05-30 | 1986-12-06 | Nec Corp | Plating method for magnesium alloy |
| JPH06116734A (en) * | 1992-10-02 | 1994-04-26 | Mitsui Mining & Smelting Co Ltd | Highly corrosion resistant coating method of magnesium-base alloy |
| CN1712573A (en) * | 2004-06-24 | 2005-12-28 | 侯文清 | Surface cladding treatment of ferro-manganese aluminium alloy |
| CN1793425A (en) * | 2005-12-30 | 2006-06-28 | 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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