Yuav Ua Li Cas Titanium Anodized?

Koj puas tau xav paub yuav ua li cas koj cov titanium hniav nyiaj hniav kub los yog gadgets tau lawv cov du, kav ntev? Tag nrho nws yog ua tau vim hais tias ntawm intriguing electrochemical txheej txheem hu ua anodization. Titanium tuaj yeem ua rau muaj kev tiv thaiv corrosion ntau dua, muaj qhov tawv tawv dua, thiab xim tsis tas siv cov dyes los ntawm anodizing nws. Cia peb tshuaj xyuas cov txheej txheem thiab cov kev qhia tshwj xeeb uas ua rau lub tshuab no ua haujlwm.

Titanium yog anodized siv cov txheej txheem ua tib zoo saib xyuas cov txheej txheem los lav qhov zoo tshaj plaws thiab kev ua haujlwm ntev. Cov txheej txheem txhim kho cov khoom siv dav dav nrog rau nws cov tsos thiab tsis kam hnav.

Nws yog ib qho tseem ceeb uas yuav tsum tau ua kom koj txoj kev txaus siab hauv anodizing titanium ciaj sia, tshwj xeeb yog tias koj tab tom txiav txim siab ua-nws-koj tus kheej cov haujlwm lossis kev lag luam siv.

Tau txais tag nrho cov cuab yeej tsim nyog ua ke yog qhov tseem ceeb ua ntej koj pib txheej txheem anodization. Lub zog hluav taws xob uas tuaj yeem xa cov hluav taws xob sib txawv-feem ntau ntawm 0 thiab 120 volts-yog xav tau. Ib qho tshuaj electrolyte, uas feem ntau yog ua los ntawm diluted sulfuric acid, kuj yuav tsum tau. Ib lub thawv rau kev daws teeb meem, titanium hlau rau lub cathode, thiab cov khoom titanium uas koj xav tau anodize yuav tsum yog tag nrho ntawm kev teeb tsa.

Anodizing titanium thiab titanium alloys tam sim no feem ntau ua tiav hauv cov kua qaub. Cov txheej txheem tsis thiab anodic oxidation tov sib txawv, raws li cov xim, thickness, thiab cov khoom ntawm oxide txheej uas yog tsim.

Thaum titanium thiab titanium alloy anodic oxidation zaj duab xis tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua, cov txheej txheem tseem ceeb yog oxalic acid anodic oxidation, mem tes anodic oxidation, tuab zaj duab xis anodic oxidation, thiab xim anodic oxidation. Tsis tas li ntawd, titanium thiab titanium alloy anodic oxidation zaj duab xis ntawm kev tshem tawm yog koom nrog. Kev taw qhia txog xim anodizing muaj nyob ntawm no.

Cov pa oxygen uas ua rau ntawm titanium anode reacts nrog titanium los tsim cov oxide zaj duab xis, uas thickens nrog voltage thiab tsub kom cov oxide zaj duab xis tsis kam mus rau tam sim no txaus thaum tam sim no ntws los ntawm titanium anode tshem tawm hauv electrolyte. Ib qho hluav taws xob tshwj xeeb yog cuam tshuam nrog ib qho tshwj xeeb oxide zaj duab xis tuab, thiab oxide zaj duab xis xim txawv raws li nws thickens.

Zoo ib yam li cov electrolyte, anodic coloring thiab electroplating yuav tsum tsis muaj tej yam kev mob. Muaj ntau yam kev daws teeb meem, suav nrog 10% sulfuric acid, 5% ammonium sulfate, 5% magnesium sulfate, 1% trisodium phosphate, thiab, thaum muaj xwm txheej ceev, dawb caw tuaj yeem ntxiv rau cov tshuaj aqueous. Feem ntau hais lus, cov tshuaj distilled aqueous uas muaj 3% -5% los ntawm qhov hnyav ntawm trisodium phosphate tuaj yeem siv. Txhawm rau kom ua tiav cov xim hluav taws xob siab thaum lub sijhawm xim, chlorine ions yuav tsum tsis txhob muaj nyob rau hauv electrolyte. Vim tias qhov kub thiab txias tuaj yeem ua rau cov electrolyte tsis zoo thiab ua rau cov yeeb yaj kiab oxide ntxeem tau, cov electrolyte yuav tsum tau khaws cia rau hauv qhov chaw txias.

Thaum siv cov xim anodic, lub cathode cheeb tsam yuav tsum sib phim lossis tshaj qhov anode cheeb tsam. Vim tias tus kws kos duab nquag welds cov cathode tam sim no tso tawm ncaj qha rau cov hlau clip ntawm txhuam thaum xim xim me me, kev txwv tam sim no yog qhov tseem ceeb hauv cov xim anodic. Kev txwv qhov loj me tam sim no yog qhov tseem ceeb los xyuas kom meej tias cov tshuaj tiv thaiv anodic ceev, electrode loj, thiab xim cheeb tsam sib phim, es tsis yog tsim los ntawm ntau dhau tam sim no induced los ntawm oxide zaj duab xis rupture thiab galvanic corrosion.

Anodic oxidation yog ib hom txheej txheem electrochemical uas tsim cov oxide zaj duab xis ntawm cov hlau lossis hlau. Thaum cov txheej txheem plating tau teeb tsa thiab cov qauv tau muab tso rau hauv nws, anodic oxidation yuav siv qhov chaw ntawm cov qauv ntawm qhov chaw los ntawm kev kho qhov voltage lossis tam sim no los tsim cov oxide zaj duab xis. Rau titanium thiab nws cov alloys, hom hlau no tuaj yeem hloov kho los tswj cov electrolyte concentration, voltage thiab tam sim no magnitude, thiab lub sij hawm cov tshuaj tiv thaiv, los tsim ib txheej ntawm controllable ntev thiab diameters ntawm cov hlab ntsha nyob rau hauv lub TiO 2 nanotubes. tus qauv tus nto nanosizing. Cov raj no loj hlob los ntawm cov qauv hauv paus thiab sib txuas nrog lub hauv paus, kev sim hauv paus ntsiab lus ntawm TiO 2 nanotubes npaj rau ntawm qhov chaw ntawm titanium thiab titanium alloys siv anodic oxidation yog sau los ntawm ob lub ntsiab lus tseem ceeb:

Ti + 2H 2O=TiO 2 + 4H + + 4e (txoj kev muaj xws li 2H 2O → O 2 + 4e + 4H + Ti + O 2 → TiO 2)

TiO 2 + 6F - + 4H +=[TiF 6] 2- + 2H 2O

Nws yog pov thawj los ntawm kev saib cov tshuaj tiv thaiv mis uas muaj ob txoj kev tshuaj tiv thaiv thawj zaug: cov txheej txheem tsim ntawm TiO 2 thiab cov txheej txheem dissolution ntawm TiO 2. Cov txheej txheem ntawm dissolving TiO 2 yog tshuaj lom neeg cov tshuaj tiv thaiv, whereas creation ntawm TiO 2 tshwm sim nyob rau hauv ib puag ncig electrochemical. Lub voj voog ntawm ob qhov xwm txheej no thaum kawg ua rau kev tsim cov nanotubes. Kev tsim ntawm TiO 2 nanotubes tuaj yeem muab faib ua peb theem raws li qhov tam sim no thiab lub sijhawm, raws li pom los ntawm qhov ceev ceev-lub sij hawm nkhaus thaum lub sij hawm anodic oxidation nyob rau hauv daim duab 1. Cov tam sim no kuj tseem ceeb hauv cov tshuaj tiv thaiv anodic oxidation.

Fig. 1 Tam sim no qhov ceev-lub sij hawm nkhaus thaum lub sij hawm anodic oxidation txheej txheem

Hauv thawj theem, TiO oxide txheej yog tsim; cov tshuaj tiv thaiv twb nyuam qhuav pib, qhov tsis kam yog me me, thiab ib tug loj tam sim no generated; TiO zaj duab xis no yog tsim los ntawm TiO zaj duab xis barrier txheej; nyob rau theem thib ob, txheej thaiv txheej tsim los ntawm thawj theem ntawm TiO zaj duab xis pib yaj; ntawm ib tug tej thickness, tam sim no nyob rau hauv Circuit Court yog maj mam rov qab mus rau ib tug du lub xeev, qhia lub localized dissolution ntawm TiO zaj duab xis thiab zus tau tej cov me me qhov; nyob rau hauv lub thib peb theem, lub TiO nanotubes yog tsim, tsim los ntawm lub thib ob theem ntawm lub microporous tshwm sim los ntawm lub specimen lub saum npoo tej zaum yuav ob qho tib si siab thiab qis, hluav taws xob teb yog ntau concentrated nyob rau hauv lub qhov ntawm qhov qis concave, thiaj li hais tias cov oxidation ntawm Cov cheeb tsam no tau nrawm los ntawm cov tshuaj tiv thaiv oxidation uas tsim los ntawm Ti 4 nrog rau cov tshuaj tiv thaiv ntawm kev txav mus los ntawm cov txheej txheem oxide, uas ua rau cov txheej txheem oxidative ntawm oxide txheej yog yaj, thiab sab saum toj ntawm nanopore oxide txheej yaj ntawm qeeb. ceev, hauv qab ntawm lub qhov los ntawm lub peev xwm tshwm sim los ntawm oxidative txheej ntawm oxide txheej yog yaj Lub dissolution ntawm oxide txheej nyob rau sab saum toj ntawm lub nanopore yog qeeb, thiab lub dissolution ntawm oxide txheej nyob rau hauv qab ntawm lub pore tshwm sim. los ntawm cov hluav taws xob muaj peev xwm yog ceev ceev, yog li cov me me micropores Ameslikas generated tseem yaj thiab txuas ntxiv thiab maj mam tsim cov nanotubes.

Anodizing titanium muaj ntau qhov zoo, ib qho ntawm cov muaj peev xwm tsim cov xim zoo nkauj yam tsis tas yuav tsum tau pleev xim lossis xim. Kev cuam tshuam ntawm lub teeb nthwv dej thaws tawm ntawm oxide txheej saum npoo thiab cov hlau hauv qab no ua rau muaj xim daj. Koj tuaj yeem sib txawv ntawm cov xim uas tsim los ntawm kev tswj cov thickness ntawm oxide txheej los ntawm kev sib txawv ntawm qhov hluav taws xob muab thaum lub sij hawm txheej txheem anodization.

Tsis muaj oxide txheej thiab xim tsis sib xws yog cov teeb meem anodizing. Cov teeb meem no feem ntau tshwm sim los ntawm kev npaj tsis txaus, electrolyte paug, lossis hluav taws xob tsis tu ncua. Ua kom lub chaw ua haujlwm kom huv si thiab cov khoom siv hluav taws xob ruaj khov tuaj yeem pab txo cov teeb meem no.

Titanium anodization yog cov txheej txheem tseem ceeb rau kev lag luam thiab kev siv hauv tsev vim nws zoo heev txhim kho cov hlau resilience thiab pom kev zoo nkauj. Nws yog qhov yooj yim kom tau txais lub zog thiab muaj zog ua tiav nrog cov cuab yeej thiab cov txheej txheem. Thov hu rau kuv ntawm euros.yang@xuboti.com yog xav paub ntxiv.

Saib Ntxiv