1. Kugadzirira kupfeka
Kuti ufambise bvunzo yekupedzisira ye electrochemical, 30mm inosarudzwa × 4 mm 304 simbi isina tsvina sehwaro.Polish uye bvisa yakasara oxide layer uye ngura makwapa pamusoro pe substrate ne sandpaper, zviise mubeaker rine acetone, bvisa mavara ari pamusoro pe substrate ne bg-06c ultrasonic cleaner ye Bangjie electronics company for 20min, bvisa. marara akapfeka pamusoro pesimbi substrate nedoro uye mvura yakasvibiswa, uye oomesa nemhepo inoputika.Zvadaro, alumina (Al2O3), graphene uye hybrid kabhoni nanotube (mwnt-coohsdbs) zvakagadzirirwa muchikamu (100: 0: 0, 99.8: 0.2: 0, 99.8: 0: 0.2, 99.6: 0.2: 0.2), uye kuiswa mukati chigayo chebhora (qm-3sp2 yeNanjing NANDA chiridzwa fekitori) yekugaya bhora nekusanganisa.Iyo inotenderera yekumhanya yebhora regiyo yakaiswa ku220 R / min, uye bhora regiyo rakashandurwa ku.
Mushure mekugaya bhora, isa kumhanya kwekutenderera kwetangi yekugayira bhora kuti ive 1/2 zvakachinjana mushure mekunge kugaya kwebhora kwapera, uye isa kumhanya kwekutenderera kwetangi rekugaya bhora kuve 1/2 zvakachinjana mushure mekunge kugaya kwebhora kwapera.Bhora rakagayiwa ceramic aggregate uye binder rakasanganiswa zvakaenzana zvichienderana nehupamhi chikamu che1.0 ∶ 0.8.Pakupedzisira, iyo inonamira ceramic coating yakawanikwa nekurapa maitiro.
2. Corrosion test
Muchidzidzo ichi, iyo electrochemical corrosion test inotora Shanghai Chenhua chi660e electrochemical workstation, uye bvunzo inotora matatu emagetsi test system.Iyo platinamu electrode ndiyo yekubatsira electrode, sirivheri sirivheri chloride electrode ndiyo yereferenzi electrode, uye sampuli yakavharwa ndiyo electrode inoshanda, ine inobudirira exposure nzvimbo ye1cm2.Batanidza chirevo che electrode, kushanda kwe electrode uye electrode yekubatsira mumusero we electrolytic nechiridzwa, sezvinoratidzwa muMifananidzo 1 uye 2. Usati waedzwa, sora sampu mu electrolyte, iyo 3.5% NaCl solution.
3. Tafel kuongororwa kwe electrochemical corrosion yezvipfeko
Mufananidzo 3 unoratidza Tafel curve ye-uncoated substrate uye ceramic coating yakavharwa neakasiyana nano additives mushure me electrochemical corrosion ye19h.Iyo corrosion voltage, corrosion current density uye magetsi impedance test data yakawanikwa kubva kuelectrochemical corrosion test inoratidzwa muTafura 1.
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Kana iyo corrosion yazvino density idiki uye iyo corrosion kuramba kushanda kwakakwira, iyo corrosion resistance effect yejasi iri nani.Zvinogona kuonekwa kubva kuMufananidzo 3 uye tafura 1 kuti kana nguva yekuora yasvika 19h, iyo yakawanda yekuora kwemhepo yesimbi isina chinhu matrix ndeye -0.680 V, uye kuora kwezvino density yematrix ndiyo yakakura, inosvika 2.890 × 10-6 A. /cm2 . Kana yakaputirwa nealumina ceramic coating yakachena, iyo corrosion current density yakaderera kusvika 78% uye PE yaive 22.01%.Iyo inoratidza kuti iyo ceramic coating inoita basa rekudzivirira riri nani uye inogona kuvandudza kusimba kwekupotera kweiyo coating mu neutral electrolyte.
Apo 0.2% mwnt-cooh-sdbs kana 0.2% graphene yakawedzerwa kumucheka, kusvibiswa kwemazuva ano kwakaderera kwakaderera, kupikisa kwakawedzera, uye kushorwa kwehuputi kwakawedzera kuvandudzwa, ne PE ye38.48% uye 40.10% maererano.Kana iyo yepamusoro yakaputirwa ne0.2% mwnt-cooh-sdbs uye 0.2% graphene yakasanganiswa alumina coating, iyo corrosion ikozvino inoderedzwa kubva 2.890 × 10-6 A / cm2 kusvika 1.536 × 10-6 A / cm2, iyo yakanyanya kuramba. kukosha, kwakawedzera kubva 11388 Ω kusvika 28079 Ω, uye PE yejasi inogona kusvika 46.85%.Zvinotaridza kuti chigadzirwa chakagadzirirwa chakanangana chine kunaka kwekupokana, uye iyo synergistic mhedzisiro yekabhoni nanotubes uye graphene inogona zvinobudirira kuvandudza kushora kuramba kweceramic coating.
4. Mhedzisiro yekunyura nguva pakuvhara impedance
Kuti uenderere mberi nekuongorora kusagadzikana kwekuora kwejira, tichifunga nezve simba rekunyudza nguva yemuenzaniso mu electrolyte pamuedzo, kushandura mitsara yekudzivirira kwezviputi zvina panguva yakasiyana yekunyudzwa kunowanikwa, sezvinoratidzwa mumufananidzo. 4.
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Padanho rekutanga rekunyudzwa (10 h), nekuda kwehunyoro hwakanaka uye chimiro chejasi, iyo electrolyte yakaoma kunyudza mukati mekupfeka.Panguva ino, iyo ceramic coating inoratidza kupikisa kwakanyanya.Mushure mekunyura kwenguva yakati rebei, kushomeka kunoderera zvakanyanya, nekuti nekufamba kwenguva, iyo electrolyte zvishoma nezvishoma inogadzira chiteshi chekuora kuburikidza nemapores uye kuputika mumucheka uye inopinda mukati me matrix, zvichikonzera kuderera kukuru mukupokana kwe. the coating.
Muchikamu chechipiri, apo zvigadzirwa zvekuora zvinowedzera kusvika kune imwe chiyero, kupararira kunovharwa uye gaka rinovharwa zvishoma nezvishoma.Panguva imwecheteyo, kana iyo electrolyte ikapinda mukubatana kweiyo bonding yezasi layer / matrix, mamorekuru emvura anozobatana neFe element mumatrix pacoating / matrix junction kuburitsa simbi yakatetepa oxide firimu, inotadzisa kupinda kwe electrolyte mumatrix uye kunowedzera kukosha kwekupikisa.Kana iyo simbi isina matrix yakasvibiswa nemagetsi, mvura zhinji yegirinhi inoyerera inogadzirwa pazasi pe electrolyte.Iyo electrolytic mhinduro haina kuchinja ruvara kana electrolyzing sampu yakavharwa, iyo inogona kuratidza kuvepo kweiyo pamusoro kemikari reaction.
Nekuda kwenguva pfupi yekunyura uye yakakura yekunze pesvedzero zvinhu, kuitira kuti uwedzere kuwana iyo chaiyo shanduko hukama hwe electrochemical paramita, iyo Tafel curves ye19 h uye 19.5 h inoongororwa.Iyo corrosion current density uye kuramba kunowanikwa nezsimpwin analysis software inoratidzwa muTable 2. Inogona kuwanikwa kuti kana yakanyoroveswa kwe19 h, ichienzaniswa neyakashama substrate, iyo corrosion ikozvino density ye pure alumina uye alumina composite coating ine nano additive materials. diki uye kukosha kwekupikisa kwakakura.Iko kukosha kwekupotera kweceramic coating ine kabhoni nanotubes uye coating ine graphene yakada kufanana, ukuwo dhizaini dhizaini ine kabhoni nanotubes uye graphene composite zvinhu inowedzerwa zvakanyanya, Izvi imhaka yekuti synergistic mhedzisiro yeimwe-dimensional kabhoni nanotubes uye maviri-dimensional graphene. inovandudza corrosion resistance yezvinyorwa.
Nekuwedzera kwekunyudza nguva (19.5 h), kushorwa kwevasina substrate kunowedzera, zvichiratidza kuti iri muchikamu chechipiri chekuora uye metal oxide film inogadzirwa pamusoro pe substrate.Saizvozvo, nekuwedzera kwenguva, kushorwa kwealumina ceramic coating yakachena kunowedzerawo, zvichiratidza kuti panguva ino, kunyangwe paine kunonoka kweceramic coating, iyo electrolyte yakapinda mu bonding interface yejasi / matrix, uye yakagadzira oxide firimu. kuburikidza nemakemikari anoita.
Kuenzaniswa nealumina coating ine 0.2% mwnt-cooh-sdbs, iyo alumina yekuputira ine 0.2% graphene uye alumina coating ine 0.2% mwnt-cooh-sdbs uye 0.2% graphene, kupikisa kwekuvhara kwakaderera zvakanyanya nekuwedzera kwenguva, kwakadzikira. ne 22.94%, 25.60% uye 9.61% zvichiteerana, zvichiratidza kuti electrolyte haina kupinda mujoini pakati pekuputira nesubstrate panguva ino, Izvi zvinodaro nekuti chimiro checarbon nanotubes uye graphene chinovharira kudzika kunopinda kwe electrolyte, nokudaro kudzivirira. iyo matrix.Iyo synergistic mhedzisiro yezviviri inosimbiswa zvakare.Iyo yekupfekedza ine maviri nano zvinhu ine zvirinani corrosion resistance.
Kuburikidza neTafel curve uye shanduko yemagetsi impedance kukosha, inowanikwa kuti alumina ceramic coating ine graphene, kabhoni nanotubes uye musanganiswa wavo unogona kuvandudza corrosion kuramba kwesimbi matrix, uye synergistic mhedzisiro yezviviri izvi zvinogona kuwedzera kuvandudza ngura. kushorwa kweadhesive ceramic coating.Kuti uwedzere kuongorora mhedzisiro ye nano additives pakupokana kwekupokana kwejasi, iyo micro surface morphology yekupfeka mushure mekuora yakaonekwa.
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Mufananidzo.Mufananidzo 5 (A2) inoratidza kuti nzvimbo mushure mekuora inova yakaoma.Kune iyo substrate isina chinhu, makomba akawanda makuru ekuora anoonekwa pamusoro mushure mekunyudzwa mu electrolyte, zvichiratidza kuti kusaonda kwesimbi isina matrix kwakashata uye electrolyte iri nyore kupinda mukati me matrix.Kune yakachena alumina ceramic coating, sezvakaratidzwa muFigure 5 (B2), kunyange zvazvo porous corrosion channels inogadzirwa mushure mekuora, chimiro chakanyanya kusimba uye yakanakisa kurongeka kwekupokana kwe pure alumina ceramic coating zvinodzivirira kupindira kwe electrolyte, iyo inotsanangura chikonzero che kuvandudza kunoshanda kweiyo impedance yealumina ceramic coating.
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Surface morphology yemwnt-cooh-sdbs, machira ane 0.2% graphene uye machira ane 0.2% mwnt-cooh-sdbs uye 0.2% graphene.Zvinogona kuonekwa kuti mabhanhire maviri ane graphene mumufananidzo 6 (B2 neC2) ane chimiro cheflat, kusungirirwa pakati pezvikamu mumucheka kwakasimba, uye zvikamu zvakabatanidzwa zvakaputirwa zvakasimba nekunamatira.Kunyange zvazvo nzvimbo yacho yakanyungudutswa ne electrolyte, nzira shoma dzepore dzinoumbwa.Mushure mekuora, iyo yekuputira nzvimbo yakaoma uye kune mashoma akaremara zvimiro.Kune Mufananidzo 6 (A1, A2), nekuda kwemaitiro emwnt-cooh-sdbs, kupfekedza kusati kwaora kwakagoverwa zvakafanana porous chimiro.Mushure mekuora, ma pores echikamu chepakutanga anove akamanikana uye akareba, uye mugero unova wakadzika.Kuenzaniswa neFigure 6 (B2, C2), chimiro chine hurema hwakawanda, hunoenderana nehukuru hwekugovera coating impedance kukosha inowanikwa kubva electrochemical corrosion test.Zvinotaridza kuti iyo alumina ceramic coating ine graphene, kunyanya musanganiswa wegraphene uye kabhoni nanotube, ine yakanyanya kunaka corrosion resistance.Izvi zvinodaro nekuti chimiro chekabhoni nanotube uye graphene inogona kunyatso kuvharidzira kutsemuka uye kudzivirira matrix.
5. Hurukuro nepfupiso
Kuburikidza neiyo corrosion resistance test yecarbon nanotubes uye graphene additives pane alumina ceramic coating uye kuongororwa kweiyo yepamusoro microstructure yejasi, zvinotevera zvinotorwa:
(1) Kana nguva yekuora yaive 19 h, ichiwedzera 0.2% hybrid kabhoni nanotube + 0.2% graphene yakasanganiswa zvinhu alumina ceramic coating, iyo ngura yemazuva ano density yakawedzera kubva 2.890 × 10-6 A / cm2 pasi kusvika 1.536 × 10-6 A / cm2, iyo impedance yemagetsi inowedzerwa kubva pa11388 Ω kuenda pa28079 Ω, uye kugwinya kwegora ndiko kukuru, 46.85%.Kuenzaniswa neyakachena alumina ceramic coating, iyo composite coating ine graphene uye kabhoni nanotubes ine nani corrosion kuramba.
(2) Nekuwedzera kwenguva yekunyudzwa kwe electrolyte, iyo electrolyte inopinda mukati mejoint surface ye coating / substrate kuti ibudise metal oxide film, iyo inotadzisa kupinda kwe electrolyte mu substrate.Iyo impedance yemagetsi inotanga kuderera uye yobva yawedzera, uye kuramba kwecorrosion kweyakachena alumina ceramic coating haina kunaka.Chimiro uye synergy yekabhoni nanotubes uye graphene yakavharira kudzika kwakadzika kwe electrolyte.Kana yakanyoroveswa kwe19.5 h, iyo impedance yemagetsi yejasi ine nano zvinhu yakadzikira ne22.94%, 25.60% uye 9.61% zvichiteerana, uye kushomeka kwekupotera kwaive kwakanaka.
6. Kupesvedzera nzira yekuputira corrosion resistance
Kuburikidza neTafel curve uye shanduko yemagetsi impedance kukosha, inowanikwa kuti alumina ceramic coating ine graphene, kabhoni nanotubes uye musanganiswa wavo unogona kuvandudza corrosion kuramba kwesimbi matrix, uye synergistic mhedzisiro yezviviri izvi zvinogona kuwedzera kuvandudza ngura. kushorwa kweadhesive ceramic coating.Kuti uwedzere kuongorora mhedzisiro ye nano additives pakupokana kwekupokana kwejasi, iyo micro surface morphology yekupfeka mushure mekuora yakaonekwa.
Mufananidzo.Mufananidzo 5 (A2) inoratidza kuti nzvimbo mushure mekuora inova yakaoma.Kune iyo substrate isina chinhu, makomba akawanda makuru ekuora anoonekwa pamusoro mushure mekunyudzwa mu electrolyte, zvichiratidza kuti kusaonda kwesimbi isina matrix kwakashata uye electrolyte iri nyore kupinda mukati me matrix.Kune yakachena alumina ceramic coating, sezvakaratidzwa muFigure 5 (B2), kunyange zvazvo porous corrosion channels inogadzirwa mushure mekuora, chimiro chakanyanya kusimba uye yakanakisa kurongeka kwekupokana kwe pure alumina ceramic coating zvinodzivirira kupindira kwe electrolyte, iyo inotsanangura chikonzero che kuvandudza kunoshanda kweiyo impedance yealumina ceramic coating.
Surface morphology yemwnt-cooh-sdbs, machira ane 0.2% graphene uye machira ane 0.2% mwnt-cooh-sdbs uye 0.2% graphene.Zvinogona kuonekwa kuti mabhanhire maviri ane graphene mumufananidzo 6 (B2 neC2) ane chimiro cheflat, kusungirirwa pakati pezvikamu mumucheka kwakasimba, uye zvikamu zvakabatanidzwa zvakaputirwa zvakasimba nekunamatira.Kunyange zvazvo nzvimbo yacho yakanyungudutswa ne electrolyte, nzira shoma dzepore dzinoumbwa.Mushure mekuora, iyo yekuputira nzvimbo yakaoma uye kune mashoma akaremara zvimiro.Kune Mufananidzo 6 (A1, A2), nekuda kwemaitiro emwnt-cooh-sdbs, kupfekedza kusati kwaora kwakagoverwa zvakafanana porous chimiro.Mushure mekuora, ma pores echikamu chepakutanga anove akamanikana uye akareba, uye mugero unova wakadzika.Kuenzaniswa neFigure 6 (B2, C2), chimiro chine hurema hwakawanda, hunoenderana nehukuru hwekugovera coating impedance kukosha inowanikwa kubva electrochemical corrosion test.Zvinotaridza kuti iyo alumina ceramic coating ine graphene, kunyanya musanganiswa wegraphene uye kabhoni nanotube, ine yakanyanya kunaka corrosion resistance.Izvi zvinodaro nekuti chimiro chekabhoni nanotube uye graphene inogona kunyatso kuvharidzira kutsemuka uye kudzivirira matrix.
7. Hurukuro nepfupiso
Kuburikidza neiyo corrosion resistance test yecarbon nanotubes uye graphene additives pane alumina ceramic coating uye kuongororwa kweiyo yepamusoro microstructure yejasi, zvinotevera zvinotorwa:
(1) Kana nguva yekuora yaive 19 h, ichiwedzera 0.2% hybrid kabhoni nanotube + 0.2% graphene yakasanganiswa zvinhu alumina ceramic coating, iyo ngura yemazuva ano density yakawedzera kubva 2.890 × 10-6 A / cm2 pasi kusvika 1.536 × 10-6 A / cm2, iyo impedance yemagetsi inowedzerwa kubva pa11388 Ω kuenda pa28079 Ω, uye kugwinya kwegora ndiko kukuru, 46.85%.Kuenzaniswa neyakachena alumina ceramic coating, iyo composite coating ine graphene uye kabhoni nanotubes ine nani corrosion kuramba.
(2) Nekuwedzera kwenguva yekunyudzwa kwe electrolyte, iyo electrolyte inopinda mukati mejoint surface ye coating / substrate kuti ibudise metal oxide film, iyo inotadzisa kupinda kwe electrolyte mu substrate.Iyo impedance yemagetsi inotanga kuderera uye yobva yawedzera, uye kuramba kwecorrosion kweyakachena alumina ceramic coating haina kunaka.Chimiro uye synergy yekabhoni nanotubes uye graphene yakavharira kudzika kwakadzika kwe electrolyte.Kana yakanyoroveswa kwe19.5 h, iyo impedance yemagetsi yejasi ine nano zvinhu yakadzikira ne22.94%, 25.60% uye 9.61% zvichiteerana, uye kushomeka kwekupotera kwaive kwakanaka.
(3) Nekuda kwehunhu hwekabhoni nanotubes, iyo yakawedzera nekabhoni nanotubes chete ine yakagovaniswa porous chimiro isati yaora.Mushure mekuora, ma pores echikamu chepakutanga anove akamanikana uye akareba, uye migero inova yakadzika.Iyo yekupfekedza ine graphene ine chimiro chakati sandara isati yaora, musanganiswa pakati pezvimedu mujasi iri padyo, uye zvidimbu zvakaunganidzwa zvakaputirwa zvakasimba neanonamatira.Kunyangwe nzvimbo yacho yakanyungudutswa ne electrolyte mushure mekuora, pane mashoma pore nzira uye chimiro chichiri chakakora.Chimiro chekabhoni nanotubes uye graphene inogona kunyatso kuvharira kupararira kwekuputika uye kuchengetedza matrix.
Nguva yekutumira: Kurume-09-2022