1. Kugadzirira kuputira
Kuti bvunzo yemagetsi iite nyore, 30mm inosarudzwa × 4 mm 304 simbi isina tsvina sehwaro. Poresa wobvisa madonhwe e oxide akasara uye ngura pamusoro pe substrate ne sandpaper, woaisa mubeaker ine acetone, gadzira mavara ari pamusoro pe substrate ne bg-06c ultrasonic cleaner yekambani yemagetsi yeBangjie kwemaminitsi makumi maviri, bvisa marara akasakara pamusoro pe substrate yesimbi ne alcohol nemvura yakasanganiswa, woaomesa ne blower. Zvadaro, alumina (Al2O3), graphene uye hybrid carbon nanotube (mwnt-coohsdbs) zvakagadzirwa zvakaenzana (100: 0: 0, 99.8: 0.2: 0, 99.8: 0: 0.2, 99.6: 0.2: 0.2), woisa mu ball mill (qm-3sp2 yeNanjing NANDA instrument factory) yekugaya nekusanganisa bhora. Kumhanya kwekutenderera kwemuchina webhora kwakagadzirirwa pa220 R / min, uye muchina webhora wakashandurwa kuita
Mushure mekugaya bhora, isa kumhanya kwekutenderera kwetangi rekugaya bhora kuve 1/2 zvichichinjana mushure mekunge kugaya bhora kwapera, uye isa kumhanya kwekutenderera kwetangi rekugaya bhora kuve 1/2 zvichichinjana mushure mekunge kugaya bhora kwapera. Bhodhi receramic rakagayiwa nebhandi zvinosanganiswa zvakaenzana zvichienderana nechikamu chehukuru hwe1.0 ∶ 0.8. Pakupedzisira, jira receramic rinonamira rakawanikwa nekushandisa nzira yekurapa.
2. Kuedzwa kwengura
Muchidzidzo ichi, bvunzo ye electrochemical corrosion inoshandisa Shanghai Chenhua chi660e electrochemical workstation, uye bvunzo inoshandisa system yekuedza ma electrode matatu. Electrode yeplatinum ndiyo electrode inobatsira, electrode yesirivha ye chloride yesirivha ndiyo electrode yekureva, uye sampuro yakaputirwa ndiyo electrode inoshanda, ine nzvimbo inoshanda ye 1cm2. Batanidza electrode yekureva, electrode inoshanda uye electrode yekubatsira mu electrolytic cell nemudziyo, sezvakaratidzwa muMifananidzo 1 ne2. Musati maedzwa, nyikai sampuro mu electrolyte, inova 3.5% NaCl solution.
3. Kuongororwa kweTafel kwekuora kwemagetsi kwezvipfeko
Mufananidzo 3 unoratidza Tafel curve ye substrate isina kuputirwa uye ceramic coating yakafukidzwa ne nano additives dzakasiyana mushure mekuora kwe electrochemical kwemaawa gumi nemapfumbamwe. Corrosion voltage, corrosion current density uye electrical impedance test data yakawanikwa kubva ku electrochemical corrosion test inoratidzwa muTafura 1.
Tumira
Kana huwandu hwe corrosion current hwakaderera uye kushanda zvakanaka kwe corrosion resistance kwakakwira, mhedzisiro ye corrosion resistance ye coating inova nani. Zvinogona kuonekwa kubva paMufananidzo 3 netafura 1 kuti kana nguva ye corrosion iri 19h, corrosion voltage yepamusoro ye bare metal matrix i -0.680 V, uye corrosion current density ye matrix ndiyo yakakurawo, inosvika 2.890 × 10-6 A/cm2 。 Kana yakafukidzwa ne pure alumina ceramic coating, corrosion current density yakaderera kusvika 78% uye PE yaive 22.01%. Izvi zvinoratidza kuti ceramic coating inoita basa rekudzivirira zviri nani uye inogona kuvandudza corrosion resistance ye coating mu neutral electrolyte.
Kana 0.2% mwnt-cooh-sdbs kana 0.2% graphene yakawedzerwa pa coating, corrosion current density yakaderera, resistance yakawedzera, uye corrosion resistance ye coating yakawedzerwa, nePE ye38.48% uye 40.10% zvichiteerana. Kana pamusoro pakafukidzwa ne 0.2% mwnt-cooh-sdbs uye 0.2% graphene mixed alumina coating, corrosion current inoderedzwa kubva pa2.890 × 10-6 A / cm2 kusvika pa1.536 × 10-6 A / cm2, iyo yakanyanya resistance value, yakawedzera kubva pa11388 Ω kusvika pa28079 Ω, uye PE ye coating inogona kusvika pa46.85%. Izvi zvinoratidza kuti chigadzirwa chakagadzirwa chine resistance yakanaka ye corrosion, uye synergistic effect ye carbon nanotubes ne graphene inogona kuvandudza zvinobudirira corrosion resistance ye ceramic coating.
4. Mhedzisiro yenguva yekunyorova pakuvhara impedance
Kuti tiongorore zvakanyanya kuramba kwejira rekuputira, tichifunga nezvesimba renguva yekunyudzwa kwemuenzaniso mu electrolyte pamuedzo, ma curve ekuchinja kwekuramba kwejira rekuputira mana panguva dzakasiyana dzekunyudzwa anowanikwa, sezvakaratidzwa muMufananidzo 4.
Tumira
Pakutanga kwekunyudzwa (maawa gumi), nekuda kwekuwanda kwakanaka uye chimiro chependi, electrolyte inonetsa kunyudzwa mupendi. Panguva ino, pendi yeceramic inoratidza kuramba kwakanyanya. Mushure mekunyudzwa kwenguva yakati, kuramba kunoderera zvakanyanya, nekuti nekufamba kwenguva, electrolyte inogadzira nzira yekuora kuburikidza nemaburi nemaburi ari mupendi uye inopinda mu matrix, zvichikonzera kudzikira kukuru kwekudzivirira kwependi.
Muchikamu chechipiri, kana zvigadzirwa zve corrosion zvikawedzera kusvika pahuwandu hwakati, kupararira kunovharwa uye mukaha unovharwa zvishoma nezvishoma. Panguva imwe chete, kana electrolyte ichipinda mu bonding interface ye bonding bottom layer / matrix, mamorekuru emvura achaita neFe element iri mu matrix pa coating / matrix junction kuti igadzire thin metal oxide film, iyo inotadzisa kupinda kwe electrolyte mu matrix uye inowedzera resistance value. Kana bare metal matrix yapwanywa ne electrochemically, yakawanda ye green flocculent precipitation inogadzirwa pasi pe electrolyte. Electrolytic solution haina kuchinja ruvara pa electrolysing coated sample, izvo zvinogona kuratidza kuvapo kwe chemical reaction iri pamusoro apa.
Nekuda kwenguva pfupi yekunyorova uye zvinhu zvakawanda zvinopesvedzera kunze, kuti tiwane hukama hwakarurama hwekuchinja kwema electrochemical parameters, ma Tafel curves emaawa 19 uye 19.5 anoongororwa. Kuwanda kwe corrosion current uye resistance zvinowanikwa ne zsimpwin analysis software zvinoratidzwa muTafura 2. Zvinogona kuwanikwa kuti kana zvanyorova kwemaawa 19, zvichienzaniswa ne bare substrate, corrosion current density ye pure alumina ne alumina composite coating ine nano additive materials idiki uye resistance value yakakura. Resistance value ye ceramic coating ine carbon nanotubes uye coating ine graphene inenge yakafanana, nepo coating structure ine carbon nanotubes uye graphene composite materials inowedzera zvakanyanya, Izvi zvinodaro nekuti synergistic effect ye one-dimensional carbon nanotubes uye two-dimensional graphene inovandudza corrosion resistance yezvinhu.
Nekuwedzera kwenguva yekunyudzwa (19.5 h), kuramba kwe substrate isina chinhu kunowedzera, zvichiratidza kuti iri padanho rechipiri rekuora uye firimu resimbi oxide rinogadzirwa pamusoro pe substrate. Saizvozvowo, nekuwedzera kwenguva, kuramba kwe pure alumina ceramic coating kunowedzerawo, zvichiratidza kuti panguva ino, kunyangwe paine mhedzisiro inononoka ye ceramic coating, electrolyte yapinda mu bonding interface ye coating / matrix, uye yakagadzira oxide firimu kuburikidza ne chemical reaction.
Zvichienzaniswa ne alumina coating ine 0.2% mwnt-cooh-sdbs, alumina coating ine 0.2% graphene uye alumina coating ine 0.2% mwnt-cooh-sdbs uye 0.2% graphene, coating resistance yakaderera zvakanyanya nekuwedzera kwenguva, yakaderera ne22.94%, 25.60% uye 9.61% zvichiteerana, zvichiratidza kuti electrolyte haina kupinda mujoinhi iri pakati pe coating ne substrate panguva ino, Izvi zvinodaro nekuti chimiro checarbon nanotubes ne graphene chinovhara kupinda kwe electrolyte pasi, nokudaro chichidzivirira matrix. Mhedzisiro yekubatana kwezviviri inosimbiswa zvakare. Coating ine zvinhu zviviri zve nano ine coating iri nani ye corrosion.
Kuburikidza neTafel curve uye kuchinja kwekuchinja kwesimba remagetsi, zvakaonekwa kuti alumina ceramic coating ine graphene, carbon nanotubes nemusanganiswa wadzo zvinogona kuvandudza kuramba kwesimbi, uye kushanda pamwe chete kwezviviri kunogona kuwedzera kuramba kwesimbi coating ine adhesive ceramic. Kuti tiongorore zvakanyanya mhedzisiro ye nano additives pakuramba kwesimbi, chimiro che micro surface che coating mushure mekuora chakaonekwa.
Tumira
Mufananidzo 5 (A1, A2, B1, B2) unoratidza chimiro chepamusoro chesimbi isina tsvina 304 uye pure alumina ceramics dzakaputirwa pakukura kwakasiyana mushure mekuora. Mufananidzo 5 (A2) unoratidza kuti pamusoro mushure mekuora panova pakaoma. Kune substrate isina chinhu, makomba akati wandei ekuora anoonekwa pamusoro mushure mekunyudzwa mu electrolyte, zvichiratidza kuti kuramba kwekuora kwe matrix yesimbi isina chinhu kwakashata uye electrolyte iri nyore kupinda mu matrix. Kune pure alumina ceramic coating, sezvakaratidzwa muMufananidzo 5 (B2), kunyangwe nzira dze corrosion dzine maburi dzichigadzirwa mushure mekuora, chimiro chakasimba uye kuramba kwekuora kwakanaka kwe pure alumina ceramic coating zvinodzivirira kupinda kwe electrolyte, izvo zvinotsanangura chikonzero chekuvandudzika kwakanaka kwe impedance ye alumina ceramic coating.
Tumira
Maumbirwo epamusoro e mwnt-cooh-sdbs, machira ane 0.2% graphene uye machira ane 0.2% mwnt-cooh-sdbs uye 0.2% graphene. Zvinogona kuonekwa kuti machira maviri ane graphene muMufananidzo 6 (B2 naC2) ane chimiro chakati sandara, kubatana pakati pezvikamu zviri mujira kwakasimba, uye zvikamu zvakabatanidzwa zvakaputirwa zvakasimba ne namati. Kunyangwe pamusoro pacho pakabviswa ne electrolyte, nzira shoma dzemaburi dzinoumbwa. Mushure mekuora, pamusoro pejira pacho pakaoma uye pane zvimiro zvishoma zvekukanganisa. PaMufananidzo 6 (A1, A2), nekuda kwehunhu hwe mwnt-cooh-sdbs, chifukidziro chisati chasvika pakuora chimiro chine maburi chakapararira zvakaenzana. Mushure mekuora, maburi echikamu chekutanga anova matete uye akareba, uye chiteshi chinova chakadzika. Kana tichienzanisa neMufananidzo 6 (B2, C2), chimiro chacho chine zvikanganiso zvakawanda, zvinoenderana nekugoverwa kwehukuru hwe coating impedance value inowanikwa kubva ku electrochemical corrosion test. Zvinoratidza kuti alumina ceramic coating ine graphene, kunyanya musanganiswa wegraphene necarbon nanotube, ine simba rakanakisisa rekudzivirira ngura. Izvi zvinodaro nekuti chimiro checarbon nanotube negraphene chinogona kudzivirira kupararira kwematombo uye kudzivirira matrix.
5. Kukurukurirana uye pfupiso
Kuburikidza nekuyedzwa kwekudzivirira ngura kwemachubhu ecarbon nanotubes uye zvinowedzera zvegraphene pa alumina ceramic coating uye kuongororwa kwechimiro chepamusoro che coating, mhedziso dzinotevera dzinotorwa:
(1) Nguva yekuora payakanga iri maawa gumi nemapfumbamwe, kuwedzera 0.2% hybrid carbon nanotube + 0.2% graphene mixed material alumina ceramic coating, corrosion current density yakawedzera kubva pa2.890 × 10-6 A / cm2 kusvika pa1.536 × 10-6 A / cm2, electrical impedance yakawedzera kubva pa11388 Ω kusvika pa28079 Ω, uye corrosion resistance efficiency ndiyo yakakura kupfuura dzose, 46.85%. Kana tichienzanisa ne pure alumina ceramic coating, composite coating ine graphene uye carbon nanotubes ine corrosion resistance iri nani.
(2) Nekuwedzera kwenguva yekunyudzwa kwe electrolyte, electrolyte inopinda mukati mechikamu che coating/substrate kuti igadzire metal oxide film, iyo inotadzisa kupinda kwe electrolyte mu substrate. Kupinzwa kwemagetsi kunotanga kwaderera uye kwozowedzera, uye kuramba kwekuora kwe pure alumina ceramic coating kwakashata. Maumbirwo uye kubatana kwe carbon nanotubes ne graphene zvakavhara kupinda kwe electrolyte pasi. Pakanyorova kwemaawa 19.5, kupinzwa kwemagetsi kwe coating ine nano materials kwakaderera ne22.94%, 25.60% uye 9.61% zvichiteerana, uye kuramba kwekuora kwe coating kwaive kwakanaka.
6. Maitiro ekudzivirira ngura pakuputira
Kuburikidza neTafel curve uye kuchinja kwekuchinja kwesimba remagetsi, zvakaonekwa kuti alumina ceramic coating ine graphene, carbon nanotubes nemusanganiswa wadzo zvinogona kuvandudza kuramba kwesimbi, uye kushanda pamwe chete kwezviviri kunogona kuwedzera kuramba kwesimbi coating ine adhesive ceramic. Kuti tiongorore zvakanyanya mhedzisiro ye nano additives pakuramba kwesimbi, chimiro che micro surface che coating mushure mekuora chakaonekwa.
Mufananidzo 5 (A1, A2, B1, B2) unoratidza chimiro chepamusoro chesimbi isina tsvina 304 uye pure alumina ceramics dzakaputirwa pakukura kwakasiyana mushure mekuora. Mufananidzo 5 (A2) unoratidza kuti pamusoro mushure mekuora panova pakaoma. Kune substrate isina chinhu, makomba akati wandei ekuora anoonekwa pamusoro mushure mekunyudzwa mu electrolyte, zvichiratidza kuti kuramba kwekuora kwe matrix yesimbi isina chinhu kwakashata uye electrolyte iri nyore kupinda mu matrix. Kune pure alumina ceramic coating, sezvakaratidzwa muMufananidzo 5 (B2), kunyangwe nzira dze corrosion dzine maburi dzichigadzirwa mushure mekuora, chimiro chakasimba uye kuramba kwekuora kwakanaka kwe pure alumina ceramic coating zvinodzivirira kupinda kwe electrolyte, izvo zvinotsanangura chikonzero chekuvandudzika kwakanaka kwe impedance ye alumina ceramic coating.
Maumbirwo epamusoro e mwnt-cooh-sdbs, machira ane 0.2% graphene uye machira ane 0.2% mwnt-cooh-sdbs uye 0.2% graphene. Zvinogona kuonekwa kuti machira maviri ane graphene muMufananidzo 6 (B2 naC2) ane chimiro chakati sandara, kubatana pakati pezvikamu zviri mujira kwakasimba, uye zvikamu zvakabatanidzwa zvakaputirwa zvakasimba ne namati. Kunyangwe pamusoro pacho pakabviswa ne electrolyte, nzira shoma dzemaburi dzinoumbwa. Mushure mekuora, pamusoro pejira pacho pakaoma uye pane zvimiro zvishoma zvekukanganisa. PaMufananidzo 6 (A1, A2), nekuda kwehunhu hwe mwnt-cooh-sdbs, chifukidziro chisati chasvika pakuora chimiro chine maburi chakapararira zvakaenzana. Mushure mekuora, maburi echikamu chekutanga anova matete uye akareba, uye chiteshi chinova chakadzika. Kana tichienzanisa neMufananidzo 6 (B2, C2), chimiro chacho chine zvikanganiso zvakawanda, zvinoenderana nekugoverwa kwehukuru hwe coating impedance value inowanikwa kubva ku electrochemical corrosion test. Zvinoratidza kuti alumina ceramic coating ine graphene, kunyanya musanganiswa wegraphene necarbon nanotube, ine simba rakanakisisa rekudzivirira ngura. Izvi zvinodaro nekuti chimiro checarbon nanotube negraphene chinogona kudzivirira kupararira kwematombo uye kudzivirira matrix.
7. Kukurukurirana uye pfupiso
Kuburikidza nekuyedzwa kwekudzivirira ngura kwemachubhu ecarbon nanotubes uye zvinowedzera zvegraphene pa alumina ceramic coating uye kuongororwa kwechimiro chepamusoro che coating, mhedziso dzinotevera dzinotorwa:
(1) Nguva yekuora payakanga iri maawa gumi nemapfumbamwe, kuwedzera 0.2% hybrid carbon nanotube + 0.2% graphene mixed material alumina ceramic coating, corrosion current density yakawedzera kubva pa2.890 × 10-6 A / cm2 kusvika pa1.536 × 10-6 A / cm2, electrical impedance yakawedzera kubva pa11388 Ω kusvika pa28079 Ω, uye corrosion resistance efficiency ndiyo yakakura kupfuura dzose, 46.85%. Kana tichienzanisa ne pure alumina ceramic coating, composite coating ine graphene uye carbon nanotubes ine corrosion resistance iri nani.
(2) Nekuwedzera kwenguva yekunyudzwa kwe electrolyte, electrolyte inopinda mukati mechikamu che coating/substrate kuti igadzire metal oxide film, iyo inotadzisa kupinda kwe electrolyte mu substrate. Kupinzwa kwemagetsi kunotanga kwaderera uye kwozowedzera, uye kuramba kwekuora kwe pure alumina ceramic coating kwakashata. Maumbirwo uye kubatana kwe carbon nanotubes ne graphene zvakavhara kupinda kwe electrolyte pasi. Pakanyorova kwemaawa 19.5, kupinzwa kwemagetsi kwe coating ine nano materials kwakaderera ne22.94%, 25.60% uye 9.61% zvichiteerana, uye kuramba kwekuora kwe coating kwaive kwakanaka.
(3) Nekuda kwehunhu hwemachubhu ecarbon nano, chifukidziro chinowedzerwa nemachubhu ecarbon nano chete chine chimiro chakapararira zvakaenzana chisati chaora. Mushure mekuora, maburi echikamu chekutanga anova matete uye akareba, uye nzira dzinodzika. Chifukidziro chine graphene chine chimiro chakati sandara chisati chaora, musanganiswa wezvikamu zviri muchifukidziro uri pedyo, uye zvikamu zvakasanganiswa zvakaputirwa zvakasimba nenamira. Kunyangwe pamusoro pacho pakabviswa neelectrolyte mushure mekuora, kune nzira shoma dzemaburi uye chimiro chichiri chakakora. Chimiro chemachubhu ecarbon nano negraphene chinogona kudzivirira kupararira kwemutswe uye kuchengetedza matrix.
Nguva yekutumira: Kurume-09-2022