Cov kev nyab xeeb profile ntawm titanium anodes: ib qho kev tsom xam dav dav ntawm cov hlau thiab noble hlau cov tsho hlau

Titanium anodes, hu uaQhov seem seem stable (DSA), tau hloov kho cov txheej txheem hluav taws xob hauv chlor -}} heev} ntau lawm rau electroplating thiab cathodic kev tiv thaiv cov tshuab. Tsis zoo li ib txwm graphite lossis cov quav qual, cov qauv no sib xyaw ua ke aTitanium hlau substratenrog catalytic coastings ntawmNoble Mastralslossis lawv cov oxide. Thaum nyob rau corrosion tsis kam thiab ua haujlwm muaj kev nyab xeeb yog nyob ntawm kev sib cuam tshuam ntawm lub hauv paus titanium thiab nws lub tsho tshaj hauv kev lag luam. Qhov kev txheeb xyuas qhov no tau kuaj cov profile nyab xeeb ntawm txhua tivthaiv -}}}}}, raws li cov qauv kev coj ua, cov qauv kev lag luam.

TusCov neeg lag luam ntshiab titanium (cp ti)Substrate serves ua cov txheej txheem txheem rau DSA Anodes. Nws txoj kev nyab xeeb cov qia los ntawm ib qho tshwj xeebtus kheej -} passivationmechanism. Thaum raug cov pa oxygen, titanium tam sim ntawd ua a3-5 nm tuab oxide txheej (tio₂), uas yog tshuaj lom inert thiab intrically insulating. Qhov kev tiv thaiv kev tiv thaiv no rov qab los0.01 vib nas thisYog tias kev puas siv tshuab puas, tiv thaiv kev tiv thaiv corrosion nyob rau hauv feem ntau ib puag ncig.

Txawm li cas los xij, titanium kev nyab xeeb yognyomHauv ob qho xwm txheej tseem ceeb:

 Cov tshuaj fluoride / ion: Electrolytes muaj ntau dua los yog sib npaug rau 2 ppm fluoride ions (F⁻) lossis cyanide ions (CN⁻) ua rau muaj mob loj pit corrosion hnyav. Fluoride reacts nrog tio₂, sib sau soluble [tif₆] ²⁻ complexes uas ua rau cov hlau liab qab mus rau ntxiv. Cyanide induces kev ntxhov siab- corrosion tsoo, ua rau cov qauv ua tsis tiav.

 Thim rov qab polarity raug: Siv Titanium Anodes ua Cathodes, txawm tias luv luv, pibHydrogen ClittlementCov. Hydrogen ions tau txo nyob rau saum npoo diffuse rau hauv titanium lattice, ua rau brittleness thiab thaum tawg.

Muaj cov protocols muaj cainruj fluoride tswjthiabPolarity Safeardstxhawm rau tswj kev ncaj ncees. NACE TM0108 kuaj xyuas cov titanium lub ruaj khov nyob rau hauv av / ntuj dej yuav tsum xav tau ntau dua lossis sib npaug rau 1.5 v los pib rhuav tshem.

Platinum hlau, ntau tshaj plaws muaj cov pob zeb platinum pawg coals, yog dav siv nyob rau hauv dej electrolysis cov hluav taws xob hauv Nyij Pooj. Nws yog xim hlau platinum tsis yog - pakic, tab sis cov toxicity ntawm solible platinum ntsev thiab platinum complies. Qhov tsawg kawg nkaus txhaj koob tshuaj lom rau lom zem los ntawm 20 mg rau 1 gram. Guinea npua txhaj uas muaj 20 mg ntawm cloroplatinate ib phaus ntawm lub cev hnyav tau muaj mob hawb pob thiab tuag peb feeb tom qab. (Piv txwv tias muaj kev lom zem nyob rau hauv tib neeg thiab Guinea npua, ib tug neeg lom zem uas muaj kev tawm tsam los ntawm cov txiaj ntsig zoo tib yam, ua pa rau cov leeg nqaij tawv nqaij. Platinum thiab nws cov tebchaw feem ntau muaj feem ntau nqus tau los ntawm tib neeg lub cev, thiab qhov txaus ntshai tshaj plaws, los ntawm kev ua pa. Tsawg heev platinum yog nqus los ntawm kev mob plab zom mov thiab ua rau cov zis. Platinum lub peev xwm rau kev ua pa nyuaj tshwm los sib thooj ntawm ib txwm pom cov platinum yog qhov muaj kev nyab xeeb heev. Qhov no tsa cov lus nug ntawm ntau npaum li cas. Feem ntau hais lus, ib qho gram ntawm platinum tuaj yeem tsim dua ib lab ampere arepe- sijhawm hluav taws xob. Yog tias siv rau cov tshuaj tua hluav taws xob electrolytic, nrog rau txaus sodium vloride, nws tuaj yeem tsim ze li ntawm ib lab grams ntawm muaj chlorine. Nyob rau hauv kev siv tshuaj tua kab mob tshwj xeeb, piv txwv tias muaj chlorine cov ntsiab lus ntawm ib puas txhiab los ntawm platinum tuaj yeem tsau dej rau hauv. Qhov no sawv cev tsuas yog 10 micrograms tsuas yog 10 lub platinum ib tuj dej, lossis 10 nanoGram ib kilogram, ib qho loj tshaj plaws ntawm 111. Cov tshuaj no tau hais txog kev txwv tsis pub dhau los ntawm cov thev naus laus zis tam sim no. Xav txog qhov ntawd, thaum Platinum muaj tsawg tsawg, nws cov loj concentration hauv ntiaj teb Continental Cills yog 3 ntu hauv 109. Txawm li cas los xij, vim nws qhov qis dua thiab qhov nyuaj ntawm kev nqus pa taws ntawm cov platinum thiab nws cov ions, zoo li no tsis yog kev pheej hmoo kom haus dej. Yog li ntawd, platinum tseem yog qhov kev xaiv nyab xeeb ua ib qho kev ua kom nquag / plating rau cov dej electrolysis hauv kev thov ntsig txog cov zaub mov thiab dej haus.

Platinum -}}} coated titanium anodes (piv txwv li ti / pt) leverage platinum'sqis tshaj overpotential rau oxygen evolution(1.563 v vs. nws) thiab kev tiv thaiv rau tshuaj lom neeg tawm tsam. Txawm li cas los xij, kev txhawj xeeb txog kev nyab xeeb tshwm sim los ntawm:

Electrochemical xaus: Hauv chloride - re} nplua nuj electrolytes saum pH 3, pt ua soluble cloroplatinate complexes ([PTCL₆] ²⁻). Tam sim no txawv>100 ma / cm²Ua kom nrawm qhov kev ploj no, tso 2-5 ug pt / cm² / lub lim tiam rau hauv kev daws teeb meem.

Mem tes tam sim no tsis muaj zog: Thaummem tes thim electroplating, Cathodic Cycles Txo PT rau cov pawg hlau, ua raucohesive tsis ua hauj lwmthiab Delamination. Qhov kev tsis tsim nyog PT los ntawm cov ntawv luam tawm hluav taws xob (PCB) kev tsim khoom uas hloov chaw uas hloov pauv.

Kev Siv Hluav Taws Xob: Iridium {- Ua cov txheej txheej yog hloov PT hauv mem tes-

Iridium: qhov ntev tshaj plaws {- nyob, qis -}} kev mob thiab acidic. Cov kev sim tsiaj tau pom tias qhov ncauj nqus ntawm Iridium thiab nws cov lus sib xyaw yog tsawg, tsawg dua 10%, thiab lawv feem ntau tau ua tiav hauv cov quav. Iridium kuj tseem txo cov tshuaj lom, thiab tsis muaj mob hauv lub chaw kuaj mob ntawm iridium lom tau piav qhia. Tsis tas li ntawd, nyob rau hauv cov oxygen evolution tej yam kev mob yog ntau dua ruaj ntseg dua li ib 10 ntev uas yog metralic platinum. Iridium kuj muaj ntau tsawg ntau nyob hauv lub ntiaj teb crust tshaj li platinum, nrog cov ntau ntau nyob rau hauv cov av continental crust muaj peev xwm tsawg li 1/10¹³Cov. Txuas ntxiv nrog piv txwv ntawm kev tua kab mob, Iridium cov kev daws nyob rau hauv cov kua aqueous tom qab electrolysis tuaj yeem ua kom tsawg li 1/10¹²los ntawm huab hwm coj. Platinum yog suav tias yog cov khoom muaj kev nyab xeeb tshaj plaws rau titanium electrode cov khoom siv hluav taws xob thiab tau muaj pov thawj los yog cov khoom siv hluav taws xob zoo heev hauv ntau daim ntawv thov. Txawm li cas los xij, raws li cov ntaub ntawv muaj cov tshuaj lom uas twb muaj lawm, muaj lub laj thawj ntseeg tias Iridium yeej muaj kev nyab xeeb dua.

Mixed hlau oxide (MMO) anodes nrogIro₂ - ta₂o ₅ txheej txheejDominate chlorine evolution thiab acidic dej electrolysis. Iridium qhov kev nyab xeeb rau cov txiaj ntsig muaj xws li:

 Tsawg Oxygen Evolution muaj peev xwm(1.385 v thiab nws), txo cov xovtooj ntawm tes los ntawm 15% tiv versus PT thiab txo cov ntawv me me tam sim no corrosion.

 Ceramic oxide stability: Iro₂ solubility hauv cov kua qaub yog qhov tsis txaus ntseeg (< 0.1 ppb at pH 0), preventing electrolyte contamination. This makes Ir-based MMO anodes suitable for Txuaj Hluav Taws Xob Cov Ntawv Nyiaj Toojqhov twg hlau purity tseem ceeb heev.

Lub Koom Haum Me Nyuam Yaus yogcoating degradation ntawm cov peev xwm siabCov. Saum toj no 1.8 v (vs ag / artcl), irok oxidizes rau kev hloov tsis yooj yim, ua rauua kom nrawm txheej poobCov. Tswj cov peev xwm hauv qab no cov kev ua haujlwm txuas ntxiv lub neej dhau los ntawm 5 xyoo.

Ruthenium: lub ntsiab tseem ceeb hauv chlorine evolution. Kev tshawb nrhiav tsiaj qhia txog kev nqus tau tsawg los ntawm cov plab zom mov, nrog tsuas yog soluble ruthenium sib txuas rau ntau dua 10%. Nqus Ruthenium khi rau hemoglobin hauv cov ntshav thiab thauj mus rau ntau lub plab hnyuv siab, feem ntau los ntawm ob lub raum thiab maj mam ua rau cov zis. Ruthenium thiab nws cov tebchaw yog tsawg - cov tshuaj lom. Tus nruab nrab ntawm cov kev txhaj tshuaj ntawm cov nas yog 132 MG / KG / KG / KG / KG Tam sim no tsis muaj cov kws kho mob qhia txog kev ua kom muaj kev lom zem ntawm kev ua neeg siab. Txawm li cas los xij, piv rau platinum thiab iridium, ruthenium yog qhov yuav muaj kev txhawj xeeb ntau dua. Qhov no feem ntau yog vim muaj kev xaiv ntawm Ruthenium Hlau Toxicity. Platinum thiab iridium dioxide yog xam ruaj ntseg. Raws li qhov sib xyaw ua ke, Ruthenium yog kom meej meej tsawg dua li platinum. Hauv qee cov kev siv, cov kev noj haus ruthenium yog qhov siab dua li Iridium, txawm tias platinum qib. Txawm li cas los xij, thaum cov electrolyte muaj cov tshuaj chloride txaus, kev siv tus nqi ntawm ruthenium dioxide yog txawm qis dua li ntawm iuav ntawm i ntawm iuav ntawm iSidium dioxide. Piv txwv li, yog tias muaj kev sib koom ua ke ntawm 1 feem rau 100,000 ntxiv, cov kev daws teeb meem kawg hauv cov kua aqueous yog kwv yees li 1/10¹¹rau 1/10¹³.

Ruo -} Ua cov txheej txheej zoo ua rauChlor - Alkali Txheej TxheemVim tias tsis tau siv chlorine evolution efficiency. Lawv txoj kev txwv kev nyab xeeb koom nrog:

 Oxidative degradation: Hauv oxygen - }olv ev ecolt electrolytes (piv txwv li cov chaw noj mov sulasaltic ntawm cov chaw no thiab cov khoom siv pob hluav taws xob nrog kev tso tawm.

 NEEG KHO TSHUAB STABTION: Ruo₂ - Cov tsho tuab si

Muaj kev cai: Avoiding Ru-based anodes in oxygen-evolving environments prevents catastrophic failure. Kev kuaj cov txheej dhau los ntawmVoltamammetrammeterric kev txhawb nqa kev txhawb nqaTshawb nrhiav thaum ntxov.

Nws cov khoom zoo ib yam li cov ntawm titanium hauv txhua qhov. Soluble Tantum tebchaw yog nqus tau cov nyiaj tsawg tsawg, thiab tantalum uas nkag mus rau tib neeg lub cev feem ntau tau ua tiav ntawm cov zis. Sparingly soluble tantalum tebchaw thiab tantalum oxides uas tsis tshua muaj solubility yog kev sib tw yog suav hais tias yog qis- pa. Xav tias Tantalum tsis yog thawj qhov hauv txheej, thiab tantalum pentoxility ntau dua li cov txheej txheem tantenox thiab tsis muaj kev pheej hmoo rau tib neeg kev noj qab haus huv.

Tantalum tsis tshua siv ib leeg tab sis yog qhov tseem ceeb li adopant stabantnyob rau hauv iro₂ lossis ruo₂ txheej. Ntxiv 20-30 mol% ta₂o₅ rau iro₂:

 Triples Txheej Ntxiv Adhesion Zuag from 35 N to >100 n nyob rau hauv khawb kev kuaj.

 Suppresses iro₃ tsimLos ntawm kev nce cov oxidation overpotential los ntawm 200-400 MV.

 Txo cov hlau ion leachingNtawm kev tsim cov kev daws teeb meem (ir, ta) o ₂ uas tiv taus cov kua qaub acidic dissolution.

Tantalum'sbiocompatibility(Hemolysis tus nqi <3.5%) ua kom siv cov khoom siv hluav taws xob kho mob

Txhua lub noble hlau cov txheej txheem degrade ntawm peb txoj hauv kev:

Electrochemical xaus: Nrawm los ntawm overvoltage excursions lossis rov qab los.

Mechanical Delamination: Tshwm sim los ntawm cov txheej txheem tsis zoo adhesion lossis roj npuas yaig.

Corrosive nres: Cov tshuaj fluoride tsis huv: corroding lub titanium substrate hauv qab.

Kev Lag Luam Zoo Tshaj Kev Coj Uarau kev pheej hmoo txaus ntshai:

Tam sim no ceev tswj: Khiav lag luam hauv qab no2,000 A/m²; Cov nqi siab dua tsis muaj xim.

Acidm ntxuav raws turocol: Tshem tawm cov ntxig ntxig ntxig nrog 10% oxalic acid txhua 2-4 lub lis piam los tiv thaiv luv luv circuits.

Cov txheej txheem kaw: Yaug anodes nrog dej deionized tom qab kaw. Tswj hwm a2-5 ib tug tuav tam sim noYog hais tias sab laug tso kom tsis txhob muaj zaj duab xis passive rhuav tshem.

Biocompatibility (ISO 10993): Titanium anodes for medical applications must pass cytotoxicity (cell viability >90%), hemolysis (<5%), and skin irritation tests. Studies confirm Ti–24Nb–4Zr–7.9Sn anodes after anodizing meet these thresholds .

Corrosion Ntsuas (Nace TM0108): Siv tau Titanium anode ruaj khov nyob rau hauv xau / ntuj waters ntawm 1000 teev polarization ntawm 10 a / m². Kev lees txais cov txheej txheem: Qhov hnyav poob <5 mg / cms / xyoo.

Txheej txheej ntxiv (ASTM C1624): Nano-scratch testing quantifies critical load for coating delamination. Medical-grade coatings require >100 n lub zog.

Rooj: Kev Nyab Xeeb Kev Nyab Xeeb Kev Nyab Xeeb Rau Cov Ntsiab Titanium Anode Cheebtsam

Cov Lus Qhia Yav Tom Ntej: Muaj Kev Nyab Xeeb Anode Technologies:

Nano - rech crystalline txheej: Iridium - tantalum oxides nrog cov nplej ntau thiab tsawg <50 NM EXPETITS 50% siab dua yauv tsis kam.

Tooj liab -} ineOyed substrates: Ntxiv 1.5% CU rau Titanium muab cov khoom siv tshuaj tua kab mob, txo cov biofilm-} muaj feem cuam corrosion hauv kev kho cov dej.

3D {{{{}} pawm cov qauv: Laser {-}}}}} i}}}}, kev ua haujlwm qis dua qub thiab kev ntxhov siab.

Titanium anodes tsis yog "immortal" tab sis enixed tshuab uas nws muaj kev nyab xeeb yog nyob ntawm kev txwv cov khoom txwv. Platinum muaj kev ua tau zoo tab sis tsis nyob hauv qab dim; Iridium resistics acids tab sis degrades ntawm siab volfages; Ruthenium exceled hauv chlorides tab sis yaj nyob rau hauv oxygen -} evolving hlwb. Nkag siab cov ciam teb no - tswj hwm los ntawm cov qauv zoo li nace tm0108 thiab muaj kev phom sij hauv hluav taws xob, phom sij, thiab cov txheej txheem ua tsis tau. Yav tom ntej anodes yuav yuav muaj kev sib xyawMulti - Txheej Txheej Txheemthiaballoyed substratesYuav kom kev nyab xeeb kev nyab xeeb wresholds ntxiv, ua rau txuas ntxiv rau yav tom ntej - tiam tshuab.

Thov cov lus hais