1. Ukulungiselela ukumboza
Ukuze kube lula ukuhlolwa kwe-electrochemical kamuva, kukhethwa insimbi engagqwali engu-30mm × 4 mm 304 njengesisekelo. Pholisha bese ususa ungqimba lwe-oxide olusele kanye namabala okugqwala ebusweni be-substrate nge-sandpaper, uwafake ebhekheni eliqukethe i-acetone, uphathe amabala ebusweni be-substrate nge-bg-06c ultrasonic cleaner yenkampani ye-Bangjie electronics imizuzu engama-20, ususe udoti ogugile ebusweni be-substrate yensimbi ngotshwala namanzi acwengekile, bese uwomisa nge-blower. Ngemuva kwalokho, i-alumina (Al2O3), i-graphene kanye ne-hybrid carbon nanotube (mwnt-coohsdbs) zalungiswa ngokwesilinganiso (100: 0: 0, 99.8: 0.2: 0, 99.8: 0: 0.2, 99.6: 0.2: 0.2), bese ufakwa emshinini wokugaya ibhola (qm-3sp2 yefektri yezinsimbi yaseNanjing NANDA) ukuze kugaywe futhi kuxutshwe ibhola. Ijubane lokujikeleza kwe-ball mill labekwa ku-220 R / min, kanti i-ball mill yaphendulwa yaba
Ngemva kokugaya ibhola, setha isivinini sokujikeleza kwethangi lokugaya ibhola sibe yi-1/2 ngokushintshana ngemva kokuphothulwa kokugaya ibhola, bese usetha isivinini sokujikeleza kwethangi lokugaya ibhola sibe yi-1/2 ngokushintshana ngemva kokuphothulwa kokugaya ibhola. I-aggregate ye-ceramic egayiwe ngebhola kanye ne-binder kuxutshwa ngokulinganayo ngokwengxenye yobunzima engu-1.0 ∶ 0.8. Ekugcineni, i-adhesive ceramic coating itholakale ngenqubo yokwelapha.
2. Ukuhlolwa kokugqwala
Kulolu cwaningo, ukuhlolwa kokugqwala kwe-electrochemical kusebenzisa indawo yokusebenza ye-electrochemical ye-Shanghai Chenhua chi660e, kanti ukuhlolwa kusebenzisa uhlelo lokuhlola lwe-electrode ezintathu. I-electrode yeplatinum iyi-electrode esizayo, i-electrode yesiliva ye-chloride yesiliva iyi-electrode ebhekisela, kanti isampula ehlanganisiwe iyi-electrode esebenzayo, enendawo yokuchayeka ephumelelayo engu-1cm2. Xhuma i-electrode ebhekisela, i-electrode esebenzayo kanye ne-electrode esizayo kuseli ye-electrolytic nethuluzi, njengoba kuboniswe kuZithombe 1 no-2. Ngaphambi kokuhlolwa, cwilisa isampula ku-electrolyte, okuyisisombululo se-NaCl esingu-3.5%.
3. Ukuhlaziywa kwe-Tafel kokugqwala kwe-electrochemical kwezimbozo
Isithombe 3 sibonisa ijika le-Tafel le-substrate engagqokwanga kanye ne-ceramic coating embozwe ngezithasiselo ze-nano ezahlukene ngemva kokugqwala kwe-electrochemical amahora angu-19. I-voltage yokugqwala, ubuningi bamanje okugqwala kanye nedatha yokuhlola i-impedance kagesi etholwe ekuhlolweni kokugqwala kwe-electrochemical kuboniswe kuThebula 1.
Thumela
Uma ubuningi bamanje okugqwala buncane futhi ukusebenza kahle kokumelana nokugqwala kuphakeme, umphumela wokumelana nokugqwala wengubo ungcono. Kungabonakala kuMfanekiso 3 kanye nethebula 1 ukuthi uma isikhathi sokugqwala singu-19h, i-voltage ephezulu yokugqwala ye-matrix yensimbi engenalutho ingu-0.680 V, kanti ubuningi bamanje okugqwala kwe-matrix nayo inkulu kakhulu, ifinyelela ku-2.890 × 10-6 A/cm2 。 Uma imbozwe ngengubo ye-alumina ceramic emsulwa, ubuningi bamanje okugqwala behle baba ngu-78% kanti i-PE yayingu-22.01%. Kubonisa ukuthi ingubo ye-ceramic idlala indima engcono yokuvikela futhi ingathuthukisa ukumelana nokugqwala kwengubo ku-electrolyte engathathi hlangothi.
Lapho kufakwe i-0.2% mwnt-cooh-sdbs noma i-0.2% graphene ephepheni, ubuningi bamanje okugqwala buyehla, ukumelana kwanda, kanti ukumelana nokugqwala kwephepheni kwathuthukiswa kakhulu, nge-PE engu-38.48% kanye no-40.10% ngokulandelana. Lapho ubuso bumbozwe nge-0.2% mwnt-cooh-sdbs kanye ne-0.2% graphene mixed alumina coating, ugesi wokugqwala wehla kakhulu kusuka ku-2.890 × 10-6 A / cm2 kuya ku-1.536 × 10-6 A / cm2, inani eliphakeme lokumelana, lenyuke kusuka ku-11388 Ω kuya ku-28079 Ω, kanti i-PE yephepheni ingafinyelela ku-46.85%. Kubonisa ukuthi umkhiqizo oqondiwe olungiselelwe unokumelana okuhle kokugqwala, futhi umphumela wokubambisana wama-carbon nanotubes kanye ne-graphene ungathuthukisa ngempumelelo ukumelana nokugqwala kwephepheni le-ceramic.
4. Umphumela wesikhathi sokucwilisa ekuphepheni kokumboza
Ukuze kuhlolwe kabanzi ukumelana nokugqwala kwesembozo, uma kucatshangelwa ithonya lesikhathi sokucwiliswa kwesampula ku-electrolyte esivivinyweni, kutholakala amajika okushintsha kokumelana kwesembozo ezine ngesikhathi sokucwiliswa esihlukile, njengoba kuboniswe kuMfanekiso 4.
Thumela
Esigabeni sokuqala sokucwiliswa (amahora ayi-10), ngenxa yobuningi obuhle kanye nesakhiwo sesembozo, i-electrolyte kunzima ukuyicwilisa esembozweni. Ngalesi sikhathi, isembozo se-ceramic sibonisa ukumelana okuphezulu. Ngemva kokucwiliswa isikhathi esithile, ukumelana kwehla kakhulu, ngoba ngokuhamba kwesikhathi, i-electrolyte kancane kancane yakha isiteshi sokugqwala ngokusebenzisa ama-pores kanye nemifantu esembozweni bese ingena ku-matrix, okuholela ekunciphiseni okukhulu kokumelana kwesembozo.
Esigabeni sesibili, lapho imikhiqizo yokugqwala ikhula ibe yinani elithile, ukusabalala kuyavinjwa futhi igebe liyavinjwa kancane kancane. Ngesikhathi esifanayo, lapho i-electrolyte ingena esibonakalayo sokubopha sengqimba/i-matrix engezansi yokubopha, ama-molecule amanzi azosabela ne-Fe element ku-matrix endaweni yokuhlanganisa/i-matrix ukuze akhiqize ifilimu encane ye-oxide yensimbi, evimbela ukungena kwe-electrolyte ku-matrix futhi ikhulise inani lokumelana. Lapho i-matrix yensimbi engenalutho iguguleka nge-electrochemically, iningi lemvula eluhlaza e-flocculent ikhiqizwa phansi kwe-electrolyte. Isixazululo se-electrolytic asizange sishintshe umbala lapho kusetshenziswa i-electrolyte isampula embozwe, okungafakazela ukuthi kukhona ukusabela kwamakhemikhali okungenhla.
Ngenxa yesikhathi esifushane sokucwilisa kanye nezici ezinkulu zethonya langaphandle, ukuze kutholakale ubudlelwano obunembile bokushintsha kwamapharamitha e-electrochemical, ama-curve e-Tafel angamahora angu-19 namahora angu-19.5 ayahlaziywa. Ubuningi bamanje okugqwala kanye nokumelana okutholwe yisoftware yokuhlaziya i-zsimpwin kuboniswe kuThebula 2. Kungatholakala ukuthi uma kucwiliswa amahora angu-19, uma kuqhathaniswa ne-substrate engenalutho, ubuningi bamanje okugqwala be-alumina emsulwa kanye ne-alumina composite coating equkethe izinto ezengeziwe ze-nano buncane futhi inani lokumelana likhulu. Inani lokumelana le-ceramic coating equkethe ama-carbon nanotubes kanye ne-coating equkethe i-graphene cishe lifana, kuyilapho isakhiwo se-coating esine-carbon nanotubes kanye nezinto ze-graphene composite sithuthukiswa kakhulu, Lokhu kungenxa yokuthi umphumela wokubambisana wama-carbon nanotubes ane-dimensional eyodwa kanye ne-graphene ene-dimensional ezimbili uthuthukisa ukumelana kokugqwala kwezinto.
Njengoba isikhathi sokucwiliswa sikhuphuka (amahora angu-19.5), ukumelana kwe-substrate engenalutho kuyanda, okubonisa ukuthi kusesigabeni sesibili sokugqwala futhi ifilimu ye-oxide yensimbi ikhiqizwa ebusweni be-substrate. Ngokufanayo, njengoba isikhathi sikhula, ukumelana kwe-alumina ceramic coating emsulwa nakho kuyanda, okubonisa ukuthi ngalesi sikhathi, yize kunomphumela ophansi we-ceramic coating, i-electrolyte ifinyelele esibonakalayo sokubopha se-coating / matrix, futhi yakhiqiza ifilimu ye-oxide ngokusebenzisa ukusabela kwamakhemikhali.
Uma kuqhathaniswa noqweqwe lwe-alumina oluqukethe i-0.2% mwnt-cooh-sdbs, uqweqwe lwe-alumina oluqukethe i-0.2% graphene kanye noqweqwe lwe-alumina oluqukethe i-0.2% mwnt-cooh-sdbs kanye ne-0.2% graphene, ukumelana noqweqwe kwehle kakhulu ngokwanda kwesikhathi, kwehle ngo-22.94%, 25.60% kanye no-9.61% ngokulandelana, okubonisa ukuthi i-electrolyte ayizange ingene ejoyintini eliphakathi koqweqwe kanye ne-substrate ngalesi sikhathi, Lokhu kungenxa yokuthi isakhiwo sama-carbon nanotubes kanye ne-graphene sivimba ukungena kwe-electrolyte phansi, ngaleyo ndlela kuvikele i-matrix. Umphumela wokubambisana kwalokhu okubili uqinisekiswa ngokwengeziwe. Uqweqwe oluqukethe izinto ezimbili ze-nano lunokumelana okungcono kokugqwala.
Ngokusebenzisa ijika le-Tafel kanye nejika lokushintsha kwenani le-impedance kagesi, kutholakale ukuthi i-alumina ceramic coating ene-graphene, ama-carbon nanotubes kanye nengxube yawo kungathuthukisa ukumelana nokugqwala kwe-matrix yensimbi, kanti umphumela wokubambisana walokhu okubili ungathuthukisa ukumelana nokugqwala kwe-adhesive ceramic coating. Ukuze kuhlolwe kabanzi umphumela wezithasiselo ze-nano ekumelana nokugqwala kwe-coating, kwabonwa isimo se-micro surface se-coating ngemva kokugqwala.
Thumela
Isithombe 5 (A1, A2, B1, B2) sibonisa isimo sobuso be-304 stainless steel stainless kanye ne-coated pure alumina ceramics ekukhulisweni okuhlukile ngemva kokugqwala. Isithombe 5 (A2) sibonisa ukuthi ubuso ngemva kokugqwala buba buqinile. Kwi-substrate engenalutho, kuvela imigodi eminingana emikhulu yokugqwala ebusweni ngemva kokucwiliswa ku-electrolyte, okubonisa ukuthi ukumelana nokugqwala kwe-bare metal matrix kuphansi futhi i-electrolyte kulula ukungena ku-matrix. Nge-alumina ceramic coating emsulwa, njengoba kuboniswe ku-Figure 5 (B2), nakuba iziteshi zokugqwala ezinezimbobo zikhiqizwa ngemva kokugqwala, isakhiwo esiminyene kanye nokumelana nokugqwala okuhle kakhulu kwe-alumina ceramic coating emsulwa kuvimbela ngempumelelo ukuhlasela kwe-electrolyte, okuchaza isizathu sokuthuthukiswa okuphumelelayo kwe-impedance ye-alumina ceramic coating emsulwa.
Thumela
Ukwakheka kobuso be-mwnt-cooh-sdbs, izembozo eziqukethe i-graphene engu-0.2% kanye nezembozo eziqukethe i-0.2% mwnt-cooh-sdbs kanye ne-0.2% graphene. Kungabonakala ukuthi izembozo ezimbili eziqukethe i-graphene ku-Figure 6 (B2 kanye ne-C2) zinesakhiwo esiyisicaba, ukubopha phakathi kwezinhlayiya embethweni kuqinile, kanti izinhlayiya ezihlanganisiwe ziboshwe ngokuqinile nge-glue. Nakuba ubuso bugugulwa yi-electrolyte, kwakheka iziteshi ezincane ze-pore. Ngemva kokugqwala, ubuso be-coating bukhulu futhi kunezakhiwo ezimbalwa ze-defect. Ku-Figure 6 (A1, A2), ngenxa yezici ze-mwnt-cooh-sdbs, isembozo ngaphambi kokugqwala siyisakhiwo se-porous esisakazwa ngokulinganayo. Ngemva kokugqwala, izimbozo zengxenye yokuqala ziba zincane futhi zinde, futhi isiteshi siba sijulile. Uma kuqhathaniswa ne-Figure 6 (B2, C2), isakhiwo sinamaphutha amaningi, okuhambisana nokusatshalaliswa kosayizi kwenani le-impedance ye-coating elitholwe ekuhlolweni kokugqwala kwe-electrochemical. Kubonisa ukuthi uqweqwe lwe-alumina ceramic oluqukethe i-graphene, ikakhulukazi ingxube ye-graphene ne-carbon nanotube, lunokumelana okuhle kakhulu nokugqwala. Lokhu kungenxa yokuthi isakhiwo se-carbon nanotube ne-graphene singavimba ngempumelelo ukusabalala kwemifantu futhi sivikele i-matrix.
5. Ingxoxo kanye nesifinyezo
Ngokusebenzisa ukuhlolwa kokumelana nokugqwala kwama-carbon nanotubes kanye nezithasiselo ze-graphene ekumbozweni kwe-alumina ceramic kanye nokuhlaziywa kwesakhiwo esingaphezulu sengubo, kufinyelelwa eziphethweni ezilandelayo:
(1) Lapho isikhathi sokugqwala singu-19 h, kungezwa u-0.2% hybrid carbon nanotube + 0.2% graphene mixed material alumina ceramic coating, i-corrosion current density yanda kusuka ku-2.890 × 10-6 A / cm2 yehla yaya ku-1.536 × 10-6 A / cm2, i-electrical impedance yanda kusuka ku-11388 Ω kuya ku-28079 Ω, kanti ukusebenza kahle kokumelana nokugqwala kukhulu kakhulu, okungu-46.85%. Uma kuqhathaniswa nokugqoka okumsulwa kwe-alumina ceramic, ukugqoka okuhlanganisiwe okune-graphene kanye ne-carbon nanotubes kunokumelana nokugqwala okungcono.
(2) Njengoba isikhathi sokucwiliswa kwe-electrolyte sikhuphuka, i-electrolyte ingena ebusweni obuhlangene be-coating/substrate ukuze ikhiqize ifilimu ye-metal oxide, evimbela ukungena kwe-electrolyte kwi-substrate. I-electrical impedance iyancipha kuqala bese iyanda, futhi ukumelana nokugqwala kwe-alumina ceramic coating emsulwa akukuhle. Isakhiwo kanye nokusebenzisana kwama-carbon nanotubes kanye ne-graphene kuvimbele ukungena kwe-electrolyte phansi. Lapho kucwiliswa amahora angu-19.5, i-electrical impedance ye-coating equkethe izinto ze-nano yehle ngo-22.94%, 25.60% kanye no-9.61% ngokulandelana, futhi ukumelana nokugqwala kwe-coating bekukuhle.
6. Indlela yokuthonya ukumelana nokugqwala kokumboza
Ngokusebenzisa ijika le-Tafel kanye nejika lokushintsha kwenani le-impedance kagesi, kutholakale ukuthi i-alumina ceramic coating ene-graphene, ama-carbon nanotubes kanye nengxube yawo kungathuthukisa ukumelana nokugqwala kwe-matrix yensimbi, kanti umphumela wokubambisana walokhu okubili ungathuthukisa ukumelana nokugqwala kwe-adhesive ceramic coating. Ukuze kuhlolwe kabanzi umphumela wezithasiselo ze-nano ekumelana nokugqwala kwe-coating, kwabonwa isimo se-micro surface se-coating ngemva kokugqwala.
Isithombe 5 (A1, A2, B1, B2) sibonisa isimo sobuso be-304 stainless steel stainless kanye ne-coated pure alumina ceramics ekukhulisweni okuhlukile ngemva kokugqwala. Isithombe 5 (A2) sibonisa ukuthi ubuso ngemva kokugqwala buba buqinile. Kwi-substrate engenalutho, kuvela imigodi eminingana emikhulu yokugqwala ebusweni ngemva kokucwiliswa ku-electrolyte, okubonisa ukuthi ukumelana nokugqwala kwe-bare metal matrix kuphansi futhi i-electrolyte kulula ukungena ku-matrix. Nge-alumina ceramic coating emsulwa, njengoba kuboniswe ku-Figure 5 (B2), nakuba iziteshi zokugqwala ezinezimbobo zikhiqizwa ngemva kokugqwala, isakhiwo esiminyene kanye nokumelana nokugqwala okuhle kakhulu kwe-alumina ceramic coating emsulwa kuvimbela ngempumelelo ukuhlasela kwe-electrolyte, okuchaza isizathu sokuthuthukiswa okuphumelelayo kwe-impedance ye-alumina ceramic coating emsulwa.
Ukwakheka kobuso be-mwnt-cooh-sdbs, izembozo eziqukethe i-graphene engu-0.2% kanye nezembozo eziqukethe i-0.2% mwnt-cooh-sdbs kanye ne-0.2% graphene. Kungabonakala ukuthi izembozo ezimbili eziqukethe i-graphene ku-Figure 6 (B2 kanye ne-C2) zinesakhiwo esiyisicaba, ukubopha phakathi kwezinhlayiya embethweni kuqinile, kanti izinhlayiya ezihlanganisiwe ziboshwe ngokuqinile nge-glue. Nakuba ubuso bugugulwa yi-electrolyte, kwakheka iziteshi ezincane ze-pore. Ngemva kokugqwala, ubuso be-coating bukhulu futhi kunezakhiwo ezimbalwa ze-defect. Ku-Figure 6 (A1, A2), ngenxa yezici ze-mwnt-cooh-sdbs, isembozo ngaphambi kokugqwala siyisakhiwo se-porous esisakazwa ngokulinganayo. Ngemva kokugqwala, izimbozo zengxenye yokuqala ziba zincane futhi zinde, futhi isiteshi siba sijulile. Uma kuqhathaniswa ne-Figure 6 (B2, C2), isakhiwo sinamaphutha amaningi, okuhambisana nokusatshalaliswa kosayizi kwenani le-impedance ye-coating elitholwe ekuhlolweni kokugqwala kwe-electrochemical. Kubonisa ukuthi uqweqwe lwe-alumina ceramic oluqukethe i-graphene, ikakhulukazi ingxube ye-graphene ne-carbon nanotube, lunokumelana okuhle kakhulu nokugqwala. Lokhu kungenxa yokuthi isakhiwo se-carbon nanotube ne-graphene singavimba ngempumelelo ukusabalala kwemifantu futhi sivikele i-matrix.
7. Ingxoxo kanye nesifinyezo
Ngokusebenzisa ukuhlolwa kokumelana nokugqwala kwama-carbon nanotubes kanye nezithasiselo ze-graphene ekumbozweni kwe-alumina ceramic kanye nokuhlaziywa kwesakhiwo esingaphezulu sengubo, kufinyelelwa eziphethweni ezilandelayo:
(1) Lapho isikhathi sokugqwala singu-19 h, kungezwa u-0.2% hybrid carbon nanotube + 0.2% graphene mixed material alumina ceramic coating, i-corrosion current density yanda kusuka ku-2.890 × 10-6 A / cm2 yehla yaya ku-1.536 × 10-6 A / cm2, i-electrical impedance yanda kusuka ku-11388 Ω kuya ku-28079 Ω, kanti ukusebenza kahle kokumelana nokugqwala kukhulu kakhulu, okungu-46.85%. Uma kuqhathaniswa nokugqoka okumsulwa kwe-alumina ceramic, ukugqoka okuhlanganisiwe okune-graphene kanye ne-carbon nanotubes kunokumelana nokugqwala okungcono.
(2) Njengoba isikhathi sokucwiliswa kwe-electrolyte sikhuphuka, i-electrolyte ingena ebusweni obuhlangene be-coating/substrate ukuze ikhiqize ifilimu ye-metal oxide, evimbela ukungena kwe-electrolyte kwi-substrate. I-electrical impedance iyancipha kuqala bese iyanda, futhi ukumelana nokugqwala kwe-alumina ceramic coating emsulwa akukuhle. Isakhiwo kanye nokusebenzisana kwama-carbon nanotubes kanye ne-graphene kuvimbele ukungena kwe-electrolyte phansi. Lapho kucwiliswa amahora angu-19.5, i-electrical impedance ye-coating equkethe izinto ze-nano yehle ngo-22.94%, 25.60% kanye no-9.61% ngokulandelana, futhi ukumelana nokugqwala kwe-coating bekukuhle.
(3) Ngenxa yezici zama-carbon nanotubes, uqweqwe olufakwe ngama-carbon nanotubes kuphela lunesakhiwo esinamachibi esatshalaliswa ngokulinganayo ngaphambi kokugqwala. Ngemva kokugqwala, ama-pores engxenye yokuqala aba mancane futhi abe made, futhi iziteshi ziyajula. Uqweqwe oluqukethe i-graphene lunesakhiwo esiyisicaba ngaphambi kokugqwala, inhlanganisela phakathi kwezinhlayiya ezikuqweqweni iseduze, futhi izinhlayiya ezihlanganisiwe zigoqwe ngokuqinile nge-glue. Nakuba ubuso bugugulwa yi-electrolyte ngemva kokugqwala, kuneziteshi ezimbalwa zama-pore futhi isakhiwo sisaqinile. Isakhiwo sama-carbon nanotubes ne-graphene singavimba ngempumelelo ukusabalala kwemifantu futhi sivikele i-matrix.
Isikhathi sokuthunyelwe: Mashi-09-2022