1. Hoʻomākaukau i ka uhi
I mea e maʻalahi ai ka hoʻāʻo electrochemical hope, koho ʻia ʻo 30mm × 4 mm 304 kila kila ma ke kumu. Polani a wehe i ke koena o ka oxide a me na wahi lepo ma ka ili o ka substrate me ke one, e hookomo ia lakou i loko o ka beaker i loaʻa ka acetone, e mālama i nā kohu ma ka ʻili o ka substrate me ka bg-06c ultrasonic cleaner o Bangjie electronics company no 20min, e wehe i ka ʻōpala ma luna o ka ʻili o ka substrate metala me ka wai ʻona a maloʻo me ka wai. A laila, ua hoʻomākaukau ʻia ka alumina (Al2O3), graphene a me ka hybrid carbon nanotube (mwnt-coohsdbs) ma ke kaulike (100: 0: 0, 99.8: 0.2: 0, 99.8: 0: 0.2, 99.6: 0.2: 0.2), a hoʻokomo ʻia i loko o ka mea hana ball Nnjing3 mill. a hui pu. Ua hoʻonohonoho ʻia ka wikiwiki o ka wili pōleʻa i 220 R / min, a ua hoʻohuli ʻia ka wili pōleʻa i
Ma hope o ka wili poepoe, e hoʻonoho i ka māmā holo o ka pahu wili kinipōpō i 1/2 ma hope o ka pau ʻana o ka wili kinipōpō, a e hoʻonoho i ka māmā holo o ka pahu wili kinipōpō i 1/2 ma hope o ka pau ʻana o ka wili kinipōpō. Hoʻohui like ʻia ka ʻāpana seramika i wili ʻia i ka pōleʻa a me ka mea hoʻopili e like me ka hakina nui o 1.0 ∶ 0.8. ʻO ka mea hope loa, ua loaʻa ka hoʻopili ceramic adhesive ma ke kaʻina hana curing.
2. Ho'āʻo corrosion
Ma kēia noiʻi ʻana, hoʻohana ka hoʻāʻo ʻino electrochemical iā Shanghai Chenhua chi660e electrochemical workstation, a hoʻohana ka hoʻāʻo i kahi ʻōnaehana hoʻāʻo electrode ʻekolu. ʻO ka electrode platinum ka electrode kōkua, ʻo ke kala kala chloride electrode ka electrode kuhikuhi, a ʻo ka laʻana i uhi ʻia ʻo ia ka electrode hana, me kahi wahi hoʻolaha kūpono o 1cm2. E hoʻohui i ka electrode kuhikuhi, electrode hana a me ka electrode kōkua i loko o ke kelepona electrolytic me ka mea kani, e like me ka hōʻike ʻana ma nā Kiʻi 1 a me 2. Ma mua o ka hoʻāʻo ʻana, e hoʻoinu i ka hāpana i loko o ka electrolyte, ʻo ia ka 3.5% NaCl solution.
3. Ka nānā 'ana o Tafel o ka ho'ohehe'e electrochemical o nā uhi
Hōʻike ka Fig. 3 i ka pihi Tafel o ka substrate uncoated a me ka uhi seramika i uhi ʻia me nā mea hoʻohui nano ʻokoʻa ma hope o ka ʻino electrochemical no 19h. Hōʻike ʻia ka ʻikepili corrosion voltage, corrosion current density a me ka ʻikepili hoʻāʻo impedance uila i loaʻa mai ka hoʻāʻo ʻino electrochemical ma ka Papa 1.
Waiho mai
I ka liʻiliʻi o ka nui o ka corrosion o kēia manawa a ʻoi aku ka maikaʻi o ka pale ʻana i ka corrosion, ʻoi aku ka maikaʻi o ka hopena o ka corrosion o ka uhi. Hiki ke ʻike ʻia mai ka Figure 3 a me ka papa 1 i ka wā o ka corrosion manawa he 19h, ʻo ka nui o ka corrosion voltage o ka pahu metala matrix he -0.680 V, a ʻo ka corrosion o kēia manawa ka nui o ka matrix ka mea nui loa, hiki i 2.890 × 10-6 A/cm2 。 I ka wā i uhi ʻia me ka alumina keramika maʻemaʻe i kēia manawa, ua hoʻemi ʻia ka poly alumina ceramic o kēia manawa a me ka hoʻemi ʻana i ka poly alumina ceramic i kēia manawa, ʻo ka hoʻemi ʻana i ka poly alumina ceramic o kēia manawa, ʻo ka hoʻemi ʻia ʻana o ka poly alumina ceramic o kēia manawa, ʻo ka hoʻemi ʻia ʻana o ka poly alumina ceramic 8% a hiki i ka 2,890 × 10-6 A/cm2. 22.01%. Hōʻike ia he ʻoi aku ka maikaʻi o ka pale ʻana o ka uhi seramika a hiki ke hoʻomaikaʻi i ka pale ʻana i ka corrosion o ka uhi i ka electrolyte neutral.
I ka hoʻohui ʻia ʻana o 0.2% mwnt-cooh-sdbs a i ʻole 0.2% graphene i ka uhi ʻana, ua emi ka nui o ka corrosion o kēia manawa, ua hoʻonui ʻia ke kūpaʻa, a ua hoʻomaikaʻi hou ʻia ke kūpaʻa corrosion o ka uhi, me ka PE o 38,48% a me 40,10%. Ke uhi ʻia ka ʻili me ka 0.2% mwnt-cooh-sdbs a me ka 0.2% graphene i hui pū ʻia me ka alumina, ua hoʻemi hou ʻia ka corrosion o kēia manawa mai 2.890 × 10-6 A / cm2 a hiki i 1.536 × 10-6 A / cm2, ke kumu kūʻai nui loa, hoʻonui ʻia mai 11388 Ω a hiki i ka 928 Ω. hiki i ka 46.85%. Hōʻike ia i ka huahana i hoʻomākaukau ʻia he kūpaʻa maikaʻi ka corrosion, a ʻo ka hopena synergistic o carbon nanotubes a me graphene hiki ke hoʻomaikaʻi maikaʻi i ka pale ʻana i ka corrosion o ka uhi seramika.
4. Ka hopena o ka manawa hoʻoluʻu i ka impedance uhi
I mea e 'imi hou aku ai i ke ku'e 'ino o ka uhi, me ka noonoo ana i ka mana o ka manawa kaiapuni o ka laana ma ka electrolyte ma ka hoao ana, ua loaa na kaha hoololi o ke ku'e o na uhi eha i ka manawa kaiapuni like ole, e like me ka hoike ana ma ke Kii 4.
Waiho mai
I ka hoʻomaka mua o ka hoʻoinu ʻana (10 h), ma muli o ka maikaʻi maikaʻi a me ke ʻano o ka uhi, paʻakikī ka electrolyte e hoʻokomo i loko o ka uhi. I kēia manawa, hōʻike ka uhi ʻana o ka ceramic i ke kūpaʻa kiʻekiʻe. Ma hope o ka hoʻouluʻana no kekahi manawa, emi nui ke kū'ēʻana, no ka mea, me ka halaʻana o ka manawa, hana mālie ka electrolyte i kahi alaʻino ma o nā pores a me nā māwae i loko o ka uhi a komo i loko o ka matrix, e hopena i ka emi nui o ke kū'ē o ka uhi.
I ka lua o ka pae, i ka wā e hoʻonui ai nā huahana corrosion i kahi nui, paʻa ka diffusion a paʻa iki ka ʻā. I ka manawa like, i ka wā e komo ai ka electrolyte i loko o ka pilina paʻa o ka papa lalo / matrix hoʻopaʻa ʻia, e pane nā molekele wai me ka mea Fe i loko o ka matrix ma ka uhi / matrix junction e hana i kahi kiʻi ʻoniʻoni ʻoniʻoni metala, e pale ana i ke komo ʻana o ka electrolyte i loko o ka matrix a hoʻonui i ka waiwai kūʻē. Ke hoʻoheheʻe ʻia ka matrix metala ʻole i ka electrochemically, hana ʻia ka hapa nui o ka ua ʻōmaʻomaʻo flocculent ma lalo o ka electrolyte. ʻAʻole i hoʻololi ke kala electrolytic i ka wā e koho ai i ka hāpana i uhi ʻia, hiki ke hōʻoia i ke ʻano o ka hopena kemika ma luna.
Ma muli o ka manawa pōkole pōkole a me nā kumu hoʻoikaika nui o waho, i mea e loaʻa hou ai ka pilina hoʻololi pololei o nā ʻāpana electrochemical, ʻike ʻia nā pihi Tafel o 19 h a me 19.5 h. Hōʻike ʻia ka nui o ka corrosion a me ke kūpaʻa i loaʻa e ka zsimpwin analysis software ma ka Papa 2. Hiki ke ʻike ʻia i ka wā i hoʻomoʻi ʻia no 19 h, ke hoʻohālikelike ʻia me ka substrate ʻaʻole, ʻoi aku ka liʻiliʻi o ka ʻino o kēia manawa o ka alumina maʻemaʻe a me ka alumina composite i loaʻa nā mea hoʻohui nano a ʻoi aku ka nui o ka waiwai kūʻē. ʻO ka waiwai kū'ē o ka uhi pālima i loaʻa i nā nanotubes kalapona a me ka uhi i loko o ka graphene ua aneane like, ʻoiai ke hoʻonui nui ʻia ka hoʻopili ʻana me ka carbon nanotubes a me nā mea graphene composite, ʻo ia no ka mea ʻo ka hopena synergistic o hoʻokahi-dimensional carbon nanotubes a me ʻelua-dimensional graphene e hoʻomaikaʻi i ke kūpaʻa corrosion o ka mea.
Me ka piʻi ʻana o ka manawa hoʻomaʻamaʻa (19.5 h), piʻi ke kūʻē ʻana o ka substrate ʻole, e hōʻike ana aia ia i ka lua o ka pae o ka corrosion a me ke kiʻi ʻoniʻoni metala i hana ʻia ma ka ʻili o ka substrate. Pēlā nō, me ka hoʻonui ʻana o ka manawa, piʻi aʻe ke kūʻē ʻana o ka alumina ceramic coating maʻemaʻe, e hōʻike ana i kēia manawa, ʻoiai aia ka hopena lohi o ka uhi seramika, ua komo ka electrolyte i ka pilina paʻa o ka coating / matrix, a hana i ke kiʻi oxide ma o ka hopena kemika.
Ke hoʻohālikelikeʻia me ka'āpana alumina e loaʻa ana i ka 0.2% mwnt-cooh-sdbs,ʻo ka pale alumina i loaʻa i ka 0.2% graphene a me ka pale alumina i loaʻa ka 0.2% mwnt-cooh-sdbs a me ka 0.2% graphene, ua emi loa ka pale pale me ka hoʻonuiʻana o ka manawa, ua emi iho ka 22.94%, 22.94%, a me 22.94%. e hōʻike ana ʻaʻole i komo ka electrolyte i loko o ka hui ma waena o ka uhi a me ka substrate i kēia manawa, ʻo ia ke kumu o ke ʻano o ka carbon nanotubes a me ka graphene poloka i ke komo ʻana i lalo o ka electrolyte, pēlā e pale ai i ka matrix. Ua hōʻoia hou ʻia ka hopena synergistic o nā mea ʻelua. ʻOi aku ka maikaʻi o ka pale ʻana i ka corrosion o ka uhi i loaʻa i ʻelua mau mea nano.
Ma o ka Tafel curve a me ka hoololi ana o ka uila impedance waiwai, ua ike ia i ka alumina ceramic uhi me graphene, carbon nanotubes a me ko lakou hui hiki ke hoʻoikaika i ka corrosion kū'ē o ka metala matrix, a me ka synergistic hopena o na mea elua hiki hou i ka corrosion kū'ē o adhesive ceramic uhi. I mea e ʻimi hou aku ai i ka hopena o nā mea hoʻohui nano i ka pale ʻana i ka corrosion o ka uhi, ʻike ʻia ka micro surface morphology o ka uhi ma hope o ka corrosion.
Waiho mai
Hōʻike ka Figure 5 (A1, A2, B1, B2) i ka morphology o ka ʻili o ke kila kila 304 i hōʻike ʻia a uhi ʻia nā seramika alumina maʻemaʻe ma ka hoʻonui ʻokoʻa ma hope o ka ʻino ʻana. Hōʻike ke kiʻi 5 (A2) i ka ʻili o ka ʻili ma hope o ka ʻinoʻino. No ka papa lepo ʻole, ʻike ʻia kekahi mau lua ʻino nui ma ka ʻili ma hope o ka hoʻokomo ʻia ʻana i loko o ka electrolyte, e hōʻike ana he ʻilihune ke kūʻē ʻana o ka matrix metala a ua maʻalahi ka electrolyte e komo i loko o ka matrix. No ka uhi ʻana i ka alumina seramika maʻemaʻe, e like me ka mea i hōʻike ʻia ma ke Kiʻi 5 (B2), ʻoiai ua hoʻokumu ʻia nā awāwa porous ma hope o ka ʻino, ʻo ke ʻano ʻano paʻa a me ke kūpaʻa maikaʻi maikaʻi o ka pale ʻana i ka alumina seramika maʻemaʻe e pale pono ai i ka hoʻouka ʻana o ka electrolyte, e wehewehe ana i ke kumu o ka hoʻomaikaʻi maikaʻi ʻana o ka impedance o ka alumina ceramic coating.
Waiho mai
ʻO ka morphology o ka ʻili o ka mwnt-cooh-sdbs, nā uhi i loaʻa i ka 0.2% graphene a me nā uhi i loaʻa 0.2% mwnt-cooh-sdbs a me 0.2% graphene. Hiki ke ʻike ʻia ʻo nā ʻāpana ʻelua i loaʻa i ka graphene ma ke Kiʻi 6 (B2 a me C2) he ʻano palahalaha, paʻa ka paʻa ʻana ma waena o nā ʻāpana i loko o ka uhi ʻana, a ua wahī paʻa ʻia nā ʻāpana aggregate e ka mea hoʻopili. ʻOiai ua hoʻopau ʻia ka ʻili e ka electrolyte, ua hoʻokumu ʻia nā kahawai pore liʻiliʻi. Ma hope o ka corrosion, ʻoʻoleʻa ka ʻili o ka uhi a he liʻiliʻi nā hale kīnā. No ka Kiʻi 6 (A1, A2), ma muli o nā hiʻohiʻona o mwnt-cooh-sdbs, ʻo ka uhi ʻana ma mua o ka corrosion he ʻano porous i māhele like ʻia. Ma hope o ka corrosion, lilo nā pores o ka ʻāpana kumu i haiki a lōʻihi, a hohonu ke kahawai. Hoʻohālikelike ʻia me ke Kiʻi 6 (B2, C2), ʻoi aku ka nui o nā hemahema o ka hale, i kūlike me ka nui o ka hāʻawi ʻana i ka waiwai impedance coating i loaʻa mai ka hoʻāʻo ʻana i ka corrosion electrochemical. Hōʻike ia ʻo ka alumina ceramic coating i loaʻa i ka graphene, ʻoi aku ka maikaʻi o ka hui ʻana o ka graphene a me carbon nanotube, ʻoi aku ka maikaʻi o ka pale ʻana i ka corrosion. ʻO kēia no ka mea hiki i ke ʻano o carbon nanotube a me ka graphene ke hoʻopaʻa pono i ka diffusion māwae a pale i ka matrix.
5. Kūkākūkā a hōʻuluʻulu manaʻo
Ma o ka hoʻāʻo ʻana i ka corrosion resistance o carbon nanotubes a me graphene additives ma ka alumina ceramic coating a me ka nānā ʻana o ka microstructure surface o ka uhi, ua huki ʻia nā hopena aʻe:
(1) I ka manawa o ka corrosion he 19 h, hoʻohui i ka 0.2% hybrid carbon nanotube + 0.2% graphene i hui pū ʻia me ka alumina ceramic coating, ua hoʻonui ʻia ka nui o ka corrosion mai 2.890 × 10-6 A / cm2 a hiki i 1.536 × 10-6 A / cm2, ua hoʻonui ʻia ka impedance uila mai 8Ω8 a i 8Ω8. a ʻo ka maikaʻi o ka pale ʻana i ka corrosion ka mea nui loa, 46.85%. Ke hoʻohālikelike ʻia me ka hoʻoheheʻe alumina seramika maʻemaʻe, ʻoi aku ka maikaʻi o ka pale ʻana i ka corrosion o ka uhi ʻana me ka graphene a me carbon nanotubes.
(2) Me ka hoʻonui ʻana o ka manawa hoʻolulu o ka electrolyte, komo ka electrolyte i loko o ka ʻili hui o ka uhi / substrate e hana i ke kiʻi ʻoniʻoni metala, kahi e pale ai i ke komo ʻana o ka electrolyte i loko o ka substrate. Hoʻemi mua ka impedance uila a laila hoʻonui, a maikaʻi ʻole ka pale ʻana i ka corrosion o ka alumina ceramic coating. ʻO ke ʻano a me ka synergy o carbon nanotubes a me graphene i ālai i ke komo ʻana i lalo o ka electrolyte. I ka wā i hoʻomoʻa ʻia no 19.5 h, ua emi ka impedance uila o ka uhi i loaʻa nā mea nano e 22.94%, 25.60% a me 9.61% pakahi, a ua maikaʻi ke kūpaʻa corrosion o ka uhi.
6. ʻO ka mana o ka uhi ʻana i ka corrosion resistance
Ma o ka Tafel curve a me ka hoololi ana o ka uila impedance waiwai, ua ike ia i ka alumina ceramic uhi me graphene, carbon nanotubes a me ko lakou hui hiki ke hoʻoikaika i ka corrosion kū'ē o ka metala matrix, a me ka synergistic hopena o na mea elua hiki hou i ka corrosion kū'ē o adhesive ceramic uhi. I mea e ʻimi hou aku ai i ka hopena o nā mea hoʻohui nano i ka pale ʻana i ka corrosion o ka uhi, ʻike ʻia ka micro surface morphology o ka uhi ma hope o ka corrosion.
Hōʻike ka Figure 5 (A1, A2, B1, B2) i ka morphology o ka ʻili o ke kila kila 304 i hōʻike ʻia a uhi ʻia nā seramika alumina maʻemaʻe ma ka hoʻonui ʻokoʻa ma hope o ka ʻino ʻana. Hōʻike ke kiʻi 5 (A2) i ka ʻili o ka ʻili ma hope o ka ʻinoʻino. No ka papa lepo ʻole, ʻike ʻia kekahi mau lua ʻino nui ma ka ʻili ma hope o ka hoʻokomo ʻia ʻana i loko o ka electrolyte, e hōʻike ana he ʻilihune ke kūʻē ʻana o ka matrix metala a ua maʻalahi ka electrolyte e komo i loko o ka matrix. No ka uhi ʻana i ka alumina seramika maʻemaʻe, e like me ka mea i hōʻike ʻia ma ke Kiʻi 5 (B2), ʻoiai ua hoʻokumu ʻia nā awāwa porous ma hope o ka ʻino, ʻo ke ʻano ʻano paʻa a me ke kūpaʻa maikaʻi maikaʻi o ka pale ʻana i ka alumina seramika maʻemaʻe e pale pono ai i ka hoʻouka ʻana o ka electrolyte, e wehewehe ana i ke kumu o ka hoʻomaikaʻi maikaʻi ʻana o ka impedance o ka alumina ceramic coating.
ʻO ka morphology o ka ʻili o ka mwnt-cooh-sdbs, nā uhi i loaʻa i ka 0.2% graphene a me nā uhi i loaʻa 0.2% mwnt-cooh-sdbs a me 0.2% graphene. Hiki ke ʻike ʻia ʻo nā ʻāpana ʻelua i loaʻa i ka graphene ma ke Kiʻi 6 (B2 a me C2) he ʻano palahalaha, paʻa ka paʻa ʻana ma waena o nā ʻāpana i loko o ka uhi ʻana, a ua wahī paʻa ʻia nā ʻāpana aggregate e ka mea hoʻopili. ʻOiai ua hoʻopau ʻia ka ʻili e ka electrolyte, ua hoʻokumu ʻia nā kahawai pore liʻiliʻi. Ma hope o ka corrosion, ʻoʻoleʻa ka ʻili o ka uhi a he liʻiliʻi nā hale kīnā. No ka Kiʻi 6 (A1, A2), ma muli o nā hiʻohiʻona o mwnt-cooh-sdbs, ʻo ka uhi ʻana ma mua o ka corrosion he ʻano porous i māhele like ʻia. Ma hope o ka corrosion, lilo nā pores o ka ʻāpana kumu i haiki a lōʻihi, a hohonu ke kahawai. Hoʻohālikelike ʻia me ke Kiʻi 6 (B2, C2), ʻoi aku ka nui o nā hemahema o ka hale, i kūlike me ka nui o ka hāʻawi ʻana i ka waiwai impedance coating i loaʻa mai ka hoʻāʻo ʻana i ka corrosion electrochemical. Hōʻike ia ʻo ka alumina ceramic coating i loaʻa i ka graphene, ʻoi aku ka maikaʻi o ka hui ʻana o ka graphene a me carbon nanotube, ʻoi aku ka maikaʻi o ka pale ʻana i ka corrosion. ʻO kēia no ka mea hiki i ke ʻano o carbon nanotube a me ka graphene ke hoʻopaʻa pono i ka diffusion māwae a pale i ka matrix.
7. Kūkākūkā a me ka hōʻuluʻulu manaʻo
Ma o ka hoʻāʻo ʻana i ka corrosion resistance o carbon nanotubes a me graphene additives ma ka alumina ceramic coating a me ka nānā ʻana o ka microstructure surface o ka uhi, ua huki ʻia nā hopena aʻe:
(1) I ka manawa o ka corrosion he 19 h, hoʻohui i ka 0.2% hybrid carbon nanotube + 0.2% graphene i hui pū ʻia me ka alumina ceramic coating, ua hoʻonui ʻia ka nui o ka corrosion mai 2.890 × 10-6 A / cm2 a hiki i 1.536 × 10-6 A / cm2, ua hoʻonui ʻia ka impedance uila mai 8Ω8 a i 8Ω8. a ʻo ka maikaʻi o ka pale ʻana i ka corrosion ka mea nui loa, 46.85%. Ke hoʻohālikelike ʻia me ka hoʻoheheʻe alumina seramika maʻemaʻe, ʻoi aku ka maikaʻi o ka pale ʻana i ka corrosion o ka uhi ʻana me ka graphene a me carbon nanotubes.
(2) Me ka hoʻonui ʻana o ka manawa hoʻolulu o ka electrolyte, komo ka electrolyte i loko o ka ʻili hui o ka uhi / substrate e hana i ke kiʻi ʻoniʻoni metala, kahi e pale ai i ke komo ʻana o ka electrolyte i loko o ka substrate. Hoʻemi mua ka impedance uila a laila hoʻonui, a maikaʻi ʻole ka pale ʻana i ka corrosion o ka alumina ceramic coating. ʻO ke ʻano a me ka synergy o carbon nanotubes a me graphene i ālai i ke komo ʻana i lalo o ka electrolyte. I ka wā i hoʻomoʻa ʻia no 19.5 h, ua emi ka impedance uila o ka uhi i loaʻa nā mea nano e 22.94%, 25.60% a me 9.61% pakahi, a ua maikaʻi ke kūpaʻa corrosion o ka uhi.
(3) Ma muli o nā hiʻohiʻona o nā nanotubes kalapona, ʻo ka uhi i hoʻohui ʻia me nā nanotubes kalapona wale nō i hoʻokaʻawale like ʻia ke ʻano porous ma mua o ka ʻino. Ma hope o ka corrosion, lilo nā pores o ka ʻāpana kumu i haiki a lōʻihi, a hohonu nā kahawai. ʻO ka uhi i loaʻa i ka graphene he papa pālahalaha ma mua o ka ʻino ʻana, kokoke ka hui ʻana ma waena o nā ʻāpana i loko o ka uhi ʻana, a ua uhi paʻa ʻia nā ʻāpana aggregate e ka adhesive. ʻOiai ua hoʻopau ʻia ka ʻili e ka electrolyte ma hope o ka ʻino ʻana, he kakaikahi nā kahawai pore a paʻa mau ke ʻano. Hiki i ke ʻano o ka carbon nanotubes a me ka graphene ke pale pono i ka hoʻolaha ʻana o ka māwae a pale i ka matrix.
Ka manawa hoʻouna: Mar-09-2022