1. Txheej Kev Npaj Ua Haujlwm
Txhawm rau kom yooj yim rau cov ntawv xeem tom qab, 30 hli yog xaiv × 4 hli 304 stainless hlau raws li lub hauv paus. Polish thiab tshem tawm cov txheej oxide residual thiab xeb me ntsis nrog cov acetone, muab lawv tso rau hauv qab-06 lub tsev huv huv ntawm cov tuam txhab hluav taws xob rau 20min, tshem tawm Cov khib nyiab nyob rau saum npoo ntawm cov hlau substrate nrog dej cawv thiab distilled dej, thiab qhuav lawv nrog lub blower. Tom qab ntawd, Alumina (Al2o3), graphene thiab hybrid carbon nanotube (100: 0, 99.8: 0.2: 0.2: 0.2), thiab muab tso rau hauv Ib lub pob zeb (QM-3SP2 ntawm Nanjing Nanda ntsuas Hoobkas) rau pob milling thiab sib xyaw. Qhov kev sib hloov ceev ntawm lub pob zeb tau teeb tsa rau 220 R / min, thiab pob zeb tau hloov mus rau
Tom qab pob milling, teeb tsa kev sib hloov ceev ntawm pob milling tank ua tiav, thiab teeb tsa qhov kev hloov pauv pob milling tank ua 1/2 hloov tom qab lub pob milling tiav. Cov pob milled ceramic ua ke thiab binder tau sib xyaw covyees raws li pawg feem ntawm 1.0: 0.8. Thaum kawg, cov nplaum nplaum nplaum sib xyaw tau los ntawm kev kho cov txheej txheem.
2. Corrosion Xeem
Nyob rau hauv txoj kev tshawb no, controchemical corrosion corrosion corrosion adops shanghai chenhua chi660 eurglectionation, thiab kev sim ua peb chav ntsuas hluav taws xob. Lub Platinum Electrode yog cov kev pab pawg hluav taws xob, cov nyiaj Silver Strode yog qhov siv hluav taws xob hauv electrode, thiab coated electrode, nrog rau thaj chaw ua haujlwm electrode, nrog rau thaj chaw ua haujlwm ntawm 1cm2. Txuas cov ntaub ntawv siv hluav taws xob, ua haujlwm electrode, raws li cov khoom siv electrolytic nyob rau hauv cov ntsuas hluav taws xob nrog kev ntsuas, uas yog 3.5% nacl daws.
3. TAFEL tsom xam ntawm electrochemical corrosion ntawm txheej
Daim duab 3 qhia txog Tafel nkhaus ntawm uncoated substrate thiab ceramic txheej coated nrog ntau cov quav ntxiv tom qab electrochemical corrosion rau 19h. Cov volrosion corrosage, corrosion tam sim no ceev thiab hluav taws xob impedance cov ntaub ntawv tau los ntawm electrochemical corrosion yog qhia hauv Table 1.
Mloog lus
Thaum lub corrosion tam sim no me dua thiab cov xeb tsis kam ua haujlwm yog qhov siab dua, cov xeb tsis zoo ntawm cov txheej zoo dua. Nws tuaj yeem pom los ntawm daim duab 3 thiab lub rooj 1 uas thaum lub siab corrosion yog 19h, qhov corrosion tseem ceeb tshaj plaws ntawm Matrix tseem yog qhov loj tshaj plaws, ncav cuag 2.890 × 10-6 a / CM2. Thaum coated nrog cov ntshiab alumina tej hub nkauj txheej, qhov kev xeb tam sim no ceev faj poob qis mus rau 78% thiab PE yog 22.01%. Nws qhia tau tias cov ceramic txheej ua yeeb yam zoo dua lub luag haujlwm thiab tuaj yeem txhim kho cov txheej corrosion tsis kam ntawm cov hluav taws xob hauv nruab nrab hluav taws xob.
Thaum 0.2% MWNT-RDBS lossis 0.2% graphene tau ntxiv, kev tiv thaiv corrosion tam sim no txo qis dua, nrog pe ntawm 38.48% thiab 40.10% feem. Thaum cov nplaim hluav taws xob nrog 0.2% mwnt-sooh-sdbs thiab 0.2% × tam sim no yog ntxiv rau 1.536 × 10-6 a / cm2, qhov siab tshaj plaws Tus nqi, nce los ntawm 11388 ω rau 28079 ω, thiab pe hawm ntawm txheej tuaj yeem ncav cuag 46.85%. Nws qhia tau tias cov khoom lag luam npaj tau zoo, thiab cov nyhuv zoo ntawm cov pa roj carbon nanotubes thiab graphene tuaj yeem txhim kho lub corrosion tsis kam ntawm Cleamic txheej.
4. Cov nyam ntawm soaking lub sij hawm ntawm txheej txheej impedance
Txhawm rau txhawm rau tshawb cov xeb tsis kam ntawm cov txheej, kev hloov pauv ntawm cov qauv hauv nruab nrab ntawm lub sij hawm sib txawv ntawm lub sijhawm sib txawv tau, raws li qhia hauv daim duab 4.
Mloog lus
Nyob rau ntawm thawj theem ntawm immersion (10 h), vim muaj qhov zoo ntom ntom thiab cov qauv ntawm txheej, cov electrolyte yog qhov nyuaj rau rawv mus rau txheej. Nyob rau lub sijhawm no, cov kab ke kab ke ua yeeb yam muaj txiaj ntsig siab. Tom qab so rau ib lub sijhawm, kev tiv thaiv tsawg, vim hais tias nrog cov txheej txheem ntawm cov kab corrosion los ntawm cov txheej txheem thiab nkag rau hauv cov kab ke ua kom zoo nkauj thiab ua rau muaj kev tiv thaiv zoo txheej.
Hauv theem ob, thaum cov khoom corrosion nce rau qee qhov nyiaj, qhov diffusion yog thaiv thiab qhov sib txawv yog maj mam thaiv. Nyob rau tib lub sijhawm, thaum electrolyte penetross ntawm cov txheej txheem hauv qab txheej / matrix kev sib tw ua cov yeeb yaj kiab / matrix los ua ib qho xim hlau oxide cov yeeb yaj kiab, uas cuam tshuam Nkag mus rau hauv electrolyte rau hauv matrix thiab nce tus nqi tiv taus. Thaum cov hlau av hlau matrix yog Electrochemically corroded, feem ntau ntawm cov ntsuab flocculent nag lossis daus yog tsim tawm hauv qab ntawm electrolyte. Cov tshuaj electrolytic tsis hloov xim thaum cov qauv siv hluav taws xob, uas tuaj yeem ua pov thawj lub hav zoov ntawm cov tshuaj lom neeg saum toj no.
Vim yog lub sijhawm luv luv soaking thiab kom tau txais kev sib raug zoo ntxiv ntawm cov electrochemical tsis sib xws ntawm 19 h thiab 19.5 h yog kev txheeb xyuas. Cov xeb tawm tam sim no thiab kev tawm tsam tau los ntawm Zsimpwin Kev Tshawb Xyuas So, kev sib cais tam sim no, piv rau cov khoom ntshiab uas muaj nano additive cov ntaub ntawv yog me thiab cov nqi tiv thaiv tsis kam loj dua. Tus nqi tiv thaiv ntawm cov kab ke muaj cov nanotubes thiab txheej txheej zoo ib yam, qhov no yog qhov ua tau zoo ib yam, thaum lub teeb ci ntsa iab ntawm ib-seem carbon nanotubes thiab ob-graphene Txhim kho cov corrosion tsis kam ntawm cov khoom.
Nrog rau kev nce ntawm lub sijhawm nqus dej (19,5 h), qhia tias nws yog nyob rau theem ob ntawm cov zaj duab xis thiab hlau oxide zaj duab xis yog tsim nyob rau ntawm ntug substrate. Ib yam li ntawd, nrog kev nce ntawm lub sijhawm, cov tshuaj tiv thaiv ntshiab alumina, txawm hais tias muaj cov nyhuv ceramic, qhia tias muaj cov hluav taws xob qeeb, qhia tau tias muaj cov txheej txheem sib xyaw los ntawm kev siv tshuaj lom neeg.
Piv nrog alumina txheej muaj 0.2% mwnt-rdbs, graphina graphene muaj ntau dua nrog rau lub sijhawm, txo qis 22.94%, 25.60% thiab 9.61% feem, qhia tias cov electrolyte Tsis txhob nkag mus rau hauv kev sib koom ua ke ntawm txheej thiab lub substrate nyob rau lub sijhawm no, qhov no yog vim tias kev tiv thaiv cov electrolyte, yog li tiv thaiv cov matrix. Lub synergistic nyhuv ntawm ob yog ntxiv tshawb xyuas. Cov txheej muaj ob lub nano cov ntaub ntawv muaj cov khoom lag luam zoo dua.
Los ntawm Tafel nkhaus thiab cov hloov pauv ntawm hluav taws xob tus nqi, nws pom tias cov neeg siv hluav taws xob nrog cov hlau sib xyaw nrog ob qho tuaj yeem txhim kho lub xeb corrosion Kuj ntawm adhesive ceramic txheej. Txhawm rau kom paub ntxiv cov nyhuv ntawm cov nyhuv ntxiv ntawm kev ua kom xeb tawm ntawm cov txheej, micro nto morphology ntawm cov txheej tom qab corrosion tau pom.
Mloog lus
Daim duab 5 (A2, B1, B2) qhia txog lub ntsej muag morphology ntawm tus kab mob hauv qab ntawm 304 stainless hlau Daim duab 5 (A2) qhia tau tias saum npoo tom qab corrosion ua ntxhib. Rau qhov liab qab substrate, ob peb lub pits loj loj tshwm ntawm qhov chaw tom qab siv electrolyte, ua tsis tau zoo thiab cov electrolyte tau nkag mus rau hauv matrix. Rau cov ntshiab alumina cov txheej txheem txheej, raws li muaj nyob hauv Daim Duab 5 (B2) Kev txhim kho tau zoo ntawm impedance ntawm alumina tej hub txheej.
Mloog lus
Deg ntawm morphology ntawm mwnt-rdbs, txheej ci muaj 0.2% graphene thiab txheej ci ntsa iab muaj 0.2% mwnt-sdbs thiab 0.2% graphene. Nws tuaj yeem pom tau tias ob qho teeb meem uas muaj graphene hauv daim duab 6 (B2 thiab cov qauv sib dhos kom nruj, thiab cov ntawv sib cav sib ceg yog cov nplaum kom nruj. Txawm hais tias qhov saum npoo yog eroded los ntawm electrolyte, tsawg dua pore raws li tsim. Tom qab corrosion, txheej txheej txheej deg yog ntom thiab muaj ob peb yam tsis xws luag. Rau Daim Duab 6 (A2), vim muaj cov yam ntxwv ntawm Mwnt-SDBS, txheej ua ntej corrosion yog ib qho qauv sib xyaw ua ke. Tom qab corrosion, lub pores ntawm thawj feem ua nqaim thiab ntev, thiab cov channel ua tob. Piv nrog Daim Duab 6 (B2, C2), tus qauv muaj qhov tsis xws luag, uas yog sib xws nrog qhov loj me faib ntawm txheej txheem hluav taws xob. Nws qhia tau hais tias Alumina Ceramic Txheej muaj graphene, tshwj xeeb tshaj yog kev sib xyaw ntawm graphene thiab carbon naniberube, muaj qhov zoo tshaj plaws corrosion tsis kam. Qhov no yog vim tias cov qauv ntawm cov pa roj carbon nanotube thiab graphene tuaj yeem thaiv qhov kev sib cav sib diffusion thiab tiv thaiv kev sib txawv.
5. Kev Sib Tham thiab Ntsiab Lus
Los ntawm kev ntsuas corrosion tiv thaiv cov pa roj carbon nanotubes thiab cov duab sib txuas thiab kev tsom xam ntawm cov txheej txheej ntawm txheej, cov lus xaus hauv qab no yog kos:
(1) Thaum lub nroog corrosion yog 19 h, ntxiv 0.2% hybrid carbon nanotube tau nce los ntawm 2.890 × 10-6 × 10-6 a / CM2, lub hluav taws xob impedance nce los ntawm 11388 ω rau 28079 ω, thiab cov corrosion kam ua haujlwm yog Qhov loj tshaj plaws, 46.85%. Piv nrog cov ntshiab alumina cov kab ke
(2) Nrog lub sijhawm nqus dej nce electrolyte, cov electrolyte penetrates rau hauv cov txheej txheem sib zog ntawm cov neeg hlau oxide, uas thas xim rau hauv electrate. Lub hluav taws xob impedance txo thiab tom qab ntawd nce, thiab corrosion tsis kam ntawm Alumina cov khoom siv ntshiab yog cov neeg pluag. Cov qauv thiab cov khoom noj ntawm cov pa roj carbon nanotubes thiab graphene thaiv qhov qis rau hauv electrolyte. Thaum soaked rau 19.5 h, hluav taws xob cuam tshuam ntawm txheej muaj nano cov ntaub ntawv poob qis, thiab 9.61% feem ntau ntawm cov txheej ua kom zoo.
6. Cuam Tshuam Mechanism ntawm coating Corrosion Kuj
Los ntawm Tafel nkhaus thiab cov hloov pauv ntawm hluav taws xob tus nqi, nws pom tias cov neeg siv hluav taws xob nrog cov hlau sib xyaw nrog ob qho tuaj yeem txhim kho lub xeb corrosion Kuj ntawm adhesive ceramic txheej. Txhawm rau kom paub ntxiv cov nyhuv ntawm cov nyhuv ntxiv ntawm kev ua kom xeb tawm ntawm cov txheej, micro nto morphology ntawm cov txheej tom qab corrosion tau pom.
Daim duab 5 (A2, B1, B2) qhia txog lub ntsej muag morphology ntawm tus kab mob hauv qab ntawm 304 stainless hlau Daim duab 5 (A2) qhia tau tias saum npoo tom qab corrosion ua ntxhib. Rau qhov liab qab substrate, ob peb lub pits loj loj tshwm ntawm qhov chaw tom qab siv electrolyte, ua tsis tau zoo thiab cov electrolyte tau nkag mus rau hauv matrix. Rau cov ntshiab alumina cov txheej txheem txheej, raws li muaj nyob hauv Daim Duab 5 (B2) Kev txhim kho tau zoo ntawm impedance ntawm alumina tej hub txheej.
Deg ntawm morphology ntawm mwnt-rdbs, txheej ci muaj 0.2% graphene thiab txheej ci ntsa iab muaj 0.2% mwnt-sdbs thiab 0.2% graphene. Nws tuaj yeem pom tau tias ob qho teeb meem uas muaj graphene hauv daim duab 6 (B2 thiab cov qauv sib dhos kom nruj, thiab cov ntawv sib cav sib ceg yog cov nplaum kom nruj. Txawm hais tias qhov saum npoo yog eroded los ntawm electrolyte, tsawg dua pore raws li tsim. Tom qab corrosion, txheej txheej txheej deg yog ntom thiab muaj ob peb yam tsis xws luag. Rau Daim Duab 6 (A2), vim muaj cov yam ntxwv ntawm Mwnt-SDBS, txheej ua ntej corrosion yog ib qho qauv sib xyaw ua ke. Tom qab corrosion, lub pores ntawm thawj feem ua nqaim thiab ntev, thiab cov channel ua tob. Piv nrog Daim Duab 6 (B2, C2), tus qauv muaj qhov tsis xws luag, uas yog sib xws nrog qhov loj me faib ntawm txheej txheem hluav taws xob. Nws qhia tau hais tias Alumina Ceramic Txheej muaj graphene, tshwj xeeb tshaj yog kev sib xyaw ntawm graphene thiab carbon naniberube, muaj qhov zoo tshaj plaws corrosion tsis kam. Qhov no yog vim tias cov qauv ntawm cov pa roj carbon nanotube thiab graphene tuaj yeem thaiv qhov kev sib cav sib diffusion thiab tiv thaiv kev sib txawv.
7. Kev Sib Tham thiab Ntsiab Lus
Los ntawm kev ntsuas corrosion tiv thaiv cov pa roj carbon nanotubes thiab cov duab sib txuas thiab kev tsom xam ntawm cov txheej txheej ntawm txheej, cov lus xaus hauv qab no yog kos:
(1) Thaum lub nroog corrosion yog 19 h, ntxiv 0.2% hybrid carbon nanotube tau nce los ntawm 2.890 × 10-6 × 10-6 a / CM2, lub hluav taws xob impedance nce los ntawm 11388 ω rau 28079 ω, thiab cov corrosion kam ua haujlwm yog Qhov loj tshaj plaws, 46.85%. Piv nrog cov ntshiab alumina cov kab ke
(2) Nrog lub sijhawm nqus dej nce electrolyte, cov electrolyte penetrates rau hauv cov txheej txheem sib zog ntawm cov neeg hlau oxide, uas thas xim rau hauv electrate. Lub hluav taws xob impedance txo thiab tom qab ntawd nce, thiab corrosion tsis kam ntawm Alumina cov khoom siv ntshiab yog cov neeg pluag. Cov qauv thiab cov khoom noj ntawm cov pa roj carbon nanotubes thiab graphene thaiv qhov qis rau hauv electrolyte. Thaum soaked rau 19.5 h, hluav taws xob cuam tshuam ntawm txheej muaj nano cov ntaub ntawv poob qis, thiab 9.61% feem ntau ntawm cov txheej ua kom zoo.
(3) Vim yog cov yam ntxwv ntawm cov nanotubes, txheej ntxiv nrog cov pa roj carbon nanotubes ib leeg muaj cov qauv faib ua ntej xeb ua ntej corrosion. Tom qab corrosion, lub pores ntawm tus thawj feem ua nqaim thiab ntev, thiab cov channels ua kom tob dua. Cov txheej muaj graphene muaj cov qauv tiaj ua ntej corrosion ua ntej kev sib xyaw ua ke hauv cov txheej hauv cov txheej txheem yog kaw kom nruj li cov nplaum. Txawm hais tias qhov saum npoo yog yaig los ntawm electrolyte tom qab corrosion, muaj ob peb pore raws thiab tus qauv tseem ntom. Tus qauv ntawm cov pa roj carbon nanotubes thiab graphene tuaj yeem thaiv cov kev sib tsoo thiab tiv thaiv kev sib tw.
Lub Sijhawm Post: Mar-09-2022