1. Nkwadebe mkpuchi
Iji kwado ule electrochemical mechara, a na-ahọrọ 30mm × 4 mm 304 igwe anaghị agba nchara dịka ntọala.Polish ma wepụ ihe fọdụrụ oxide oyi akwa na nchara tụrụ n'elu nke mkpụrụ na sandpaper, tinye ha n'ime a beaker nwere acetone, na-emeso ndị stains n'elu nke mkpụrụ na bg-06c ultrasonic Cleaner nke Bangjie electronics ụlọ ọrụ maka 20min, wepụ. na-eyi irighiri ihe n'elu nke metal mkpụrụ na mmanya na distilled mmiri, na ọkpọọ ha na a blower.Mgbe ahụ, a na-akwadebe alumina (Al2O3), graphene na ngwakọ carbon nanotube (mwnt-coohsdbs) n'ogo (100: 0: 0, 99.8: 0.2: 0, 99.8: 0: 0.2, 99.8: 0: 0.2, 99.6: 0.2: 0.2), wee tinye ya. igwe ihe igwe (qm-3sp2 nke ụlọ ọrụ akụrụngwa Nanjing NANDA) maka egwe ọka na ịgwakọta.Edobere ọsọ igwe igwe bọọlụ ka ọ bụrụ 220 R / min, a tụgharịrị igwe igwe bọọlụ.
Mgbe agbachachara bọọlụ, debe ọsọ ntugharị nke tankị bọọlụ ka ọ bụrụ 1/2 ọzọ ka emechara igwe igwe bọọlụ, ma mee ka ọ bụrụ 1/2 ọzọ na-agbagharị agbagharị bọọlụ ka emechara.A na-agwakọta mkpokọta seramiiki a na-egweri bọọlụ na ihe nkedo n'otu n'otu dabere na nha nha nke 1.0 ∶ 0.8.N'ikpeazụ, a nwetara mkpuchi seramiiki nrapado site na usoro ọgwụgwọ.
2. Nnwale corrosion
N'ime ọmụmụ ihe a, electrochemical corrosion test adopts Shanghai Chenhua chi660e electrochemical workstation, na ule adopts a atọ electrode ule usoro.Platinum electrode bụ ihe inyeaka, ọla ọcha chloride electrode bụ electrode ntụaka, na ihe nlere mkpuchi bụ electrode na-arụ ọrụ, yana mpaghara mkpughe dị mma nke 1cm2.Jikọọ electrode ntụaka, electrode na-arụ ọrụ na inyeaka electrode na cell electrolytic na ngwá ọrụ, dị ka egosiri na Figure 1 na 2. Tupu ule ahụ, gbanye ihe nlele na electrolyte, nke bụ 3.5% NaCl ngwọta.
3. Nyocha Tafel nke electrochemical corrosion nke mkpuchi
Fig. 3 na-egosi na Tafel curve nke uncoated substrate na seramiiki mkpuchi mkpuchi na dị iche iche nano mgbakwunye mgbe electrochemical corrosion maka 19h.Voltaji corrosion, njupụta corrosion ugbu a na data ule impedance eletrik enwetara na ule corrosion electrochemical ka egosiri na Tebụl 1.
Nyefee
Mgbe njupụta nke corrosion dị ugbu a dị ntakịrị na arụmọrụ nguzogide corrosion dị elu, mmetụta mgbochi corrosion nke mkpuchi dị mma.Enwere ike ịhụ ya site na eserese 3 na tebụl 1 na mgbe oge mmebi bụ 19h, voltaji corrosion kacha elu nke matrix metal efu bụ -0.680 V, na njupụta corrosion ugbu a nke matrix bụkwa nke kachasị ukwuu, na-eru 2.890 × 10-6 A. / cm2. Mgbe ejiri mkpuchi seramiiki alumina dị ọcha kpuchie, njupụta corrosion ugbu a belatara ruo 78% na PE bụ 22.01%.Ọ na-egosi na mkpuchi seramiiki na-arụ ọrụ nchebe ka mma ma nwee ike imeziwanye nguzogide corrosion nke mkpuchi na electrolyte na-anọpụ iche.
Mgbe 0.2% mwnt-cooh-sdbs ma ọ bụ 0.2% graphene agbakwunyere na mkpuchi ahụ, njupụta nke corrosion dị ugbu a na-ebelata, nguzogide na-abawanye, na nguzogide corrosion nke mkpuchi na-emewanyewanye, na PE nke 38.48% na 40.10% n'otu n'otu.Mgbe a na-ekpuchi elu ya na 0.2% mwnt-cooh-sdbs na 0.2% graphene agwakọta alumina mkpuchi, a na-ebelata corrosion ugbu a site na 2.890 × 10-6 A / cm2 ruo 1.536 × 10-6 A / cm2, nkwụsị kachasị elu. uru, mụbara site na 11388 Ω ruo 28079 Ω, na PE nke mkpuchi nwere ike iru 46.85%.Ọ na-egosi na ngwaahịa a kwadebere nke ọma nwere ezigbo nguzogide corrosion, yana mmetụta synergistic nke carbon nanotubes na graphene nwere ike imeziwanye nguzogide corrosion nke mkpuchi seramiiki.
4. Mmetụta nke oge ịrapara na mkpuchi mkpuchi
Iji chọpụta n'ihu n'ịchọpụta nkwụsị nke corrosion nke mkpuchi ahụ, na-atụle mmetụta nke oge imikpu nke ihe nlele na electrolyte na ule ahụ, a na-enweta mgbanwe mgbanwe nke nguzogide nke mkpuchi anọ na oge imikpu dị iche iche, dị ka egosiri na Figure. 4.
Nyefee
Na ọkwa mbụ nke imikpu (10 h), n'ihi njupụta dị mma na nhazi nke mkpuchi ahụ, electrolyte siri ike ịbanye n'ime mkpuchi ahụ.N'oge a, mkpuchi seramiiki na-egosi nguzogide dị elu.Mgbe ịsachara ahụ ruo oge ụfọdụ, nguzogide na-ebelata nke ukwuu, n'ihi na ka oge na-aga, electrolyte ji nwayọọ nwayọọ na-emepụta ọwa corrosion site na pores na cracks na mkpuchi ma banye n'ime matriks, na-eme ka mbelata dị ukwuu na nguzogide nke ahụ. ihe mkpuchi ahụ.
Na ọkwa nke abụọ, mgbe ngwaahịa corrosion na-abawanye ruo n'ókè ụfọdụ, a na-egbochi mgbasa ahụ ma jiri nwayọọ nwayọọ na-egbochi oghere ahụ.N'otu oge ahụ, mgbe electrolyte penetrates n'ime bonding interface nke bonding ala oyi akwa / matrix, mmiri ụmụ irighiri ga-emeghachi omume na Fe elementrị na matriks na mkpuchi / matrix junction na-emepụta a mkpa metal oxide film, nke na-egbochi ndị ahụ. ntinye nke electrolyte n'ime matriks ma na-abawanye uru nkwụsị.Mgbe matriks metal na-enweghị ihe na-emebi emebi na-emebi, ọtụtụ n'ime mmiri ozuzo na-acha akwụkwọ ndụ akwụkwọ ndụ na-emepụta na ala nke electrolyte.Ihe ngwọta nke electrolytic agbanweghị agba mgbe ị na-eme nyocha ihe nlele ahụ, nke nwere ike igosi ịdị adị nke mmeghachi omume kemịkal dị n'elu.
N'ihi obere oge ịrapara na nnukwu ihe mmetụta mpụga, iji nwetakwuo mmekọrịta mgbanwe ziri ezi nke paramita electrochemical, a na-enyocha usoro Tafel nke 19 h na 19.5 h.A na-egosi njupụta corrosion ugbu a na nguzogide nke zsimpwin na-enweta site na ngwanrọ nyocha na Tebụl 2. Enwere ike ịhụ na mgbe etinyere ya maka 19 h, ma e jiri ya tụnyere mkpụrụ osisi efu, njupụta corrosion ugbu a nke alumina dị ọcha na mkpuchi alumina mejupụtara nke nwere ihe mgbakwunye nano bụ. obere na uru nguzogide dị ukwuu.Uru iguzogide ihe mkpuchi seramiiki nwere carbon nanotubes na mkpuchi nwere graphene fọrọ nke nta ka ọ bụrụ otu, ebe a na-eme ka usoro mkpuchi ya na carbon nanotubes na ihe mejupụtara graphene na-abawanye nke ọma, Nke a bụ n'ihi na mmetụta synergistic nke otu akụkụ carbon nanotubes na graphene akụkụ abụọ. na-eme ka ihe mgbochi corrosion dịkwuo mma.
Site na mmụba nke oge imikpu (19.5 h), nguzogide nke mkpụrụ osisi efu na-abawanye, na-egosi na ọ bụ na ọkwa nke abụọ nke corrosion na ihe nkiri metal oxide na-emepụta n'elu mkpụrụ.N'otu aka ahụ, na mmụba nke oge, nguzogide nke mkpuchi seramiiki dị ọcha alumina na-abawanye, na-egosi na n'oge a, ọ bụ ezie na enwere mmetụta na-ebelata nke mkpuchi seramiiki, electrolyte abanyela na njikọ njikọ nke mkpuchi / matrix, wee mepụta ihe nkiri oxide. site na mmeghachi omume kemịkal.
E jiri ya tụnyere ihe mkpuchi alumina nke nwere 0.2% mwnt-cooh-sdbs, mkpuchi alumina nwere 0.2% graphene na mkpuchi alumina nwere 0.2% mwnt-cooh-sdbs na 0.2% graphene, mkpuchi mkpuchi ahụ belatara nke ukwuu na mmụba nke oge, belatara. site na 22.94%, 25.60% na 9.61% n'otu n'otu, na-egosi na electrolyte abanyeghị na nkwonkwo n'etiti mkpuchi na mkpụrụ n'oge a, Nke a bụ n'ihi na nhazi nke carbon nanotubes na graphene na-egbochi ntinye ala nke electrolyte, si otú a na-echebe ya. matrix.A na-enyochakwu mmetụta synergistic nke abụọ ahụ.Ihe mkpuchi nke nwere ihe nano abụọ nwere nguzogide corrosion ka mma.
Site na Tafel curve na mgbanwe mgbanwe nke uru impedance eletriki, a na-achọpụta na mkpuchi alumina seramiiki na graphene, carbon nanotubes na ngwakọta ha nwere ike imeziwanye nguzogide corrosion nke metal matrix, na mmetụta synergistic nke abụọ nwere ike imeziwanye corrosion. iguzogide ihe mkpuchi seramiiki nrapado.Iji chọpụtakwuo mmetụta nke nano additives na nguzogide corrosion nke mkpuchi ahụ, micro surface morphology nke mkpuchi mgbe a hụrụ corrosion.
Nyefee
Ihe osise 5 (A1, A2, B1, B2) na-egosi ọdịdị elu nke 304 igwe anaghị agba nchara na mkpuchi alumina dị ọcha na-ebuli elu mgbe corrosion gasịrị.Ọgụgụ 5 (A2) na-egosi na elu mgbe corrosion na-aghọ ihe siri ike.N'ihi na iferi mkpụrụ, ọtụtụ nnukwu corrosion olulu na-apụta n'elu mgbe imikpu na electrolyte, na-egosi na corrosion iguzogide nke iferi metal matrix adịghị mma na electrolyte dị mfe ịbanye n'ime matriks.Maka mkpuchi seramiiki alumina dị ọcha, dị ka egosiri na Figure 5 (B2), ọ bụ ezie na a na-emepụta ọwa corrosion porous mgbe corrosion gasịrị, usoro dị oke oke na nguzogide corrosion dị mma nke mkpuchi seramiiki alumina dị ọcha na-egbochi mwakpo nke electrolyte, nke na-akọwa ihe kpatara ya. mma mma nke impedance nke alumina seramiiki mkpuchi.
Nyefee
Ọdịdị dị elu nke mwnt-cooh-sdbs, mkpuchi nwere 0.2% graphene na mkpuchi nwere 0.2% mwnt-cooh-sdbs na 0.2% graphene.Enwere ike ịhụ na mkpuchi abụọ nke nwere graphene dị na eserese 6 (B2 na C2) nwere nhazi dị larịị, njikọ dị n'etiti ihe ndị dị na mkpuchi ahụ siri ike, na ihe nchịkọta na-ejikọta ya na nrapado.Ọ bụ ezie na electrolyte na-emebi elu ya, a na-emepụta ọwa pore dị ntakịrị.Mgbe corrosion gachara, mkpuchi mkpuchi dị oke ma enwere ụdị ntụpọ ole na ole.Maka eserese 6 (A1, A2), n'ihi njirimara nke mwnt-cooh-sdbs, mkpuchi tupu corrosion bụ ihe owuwu porous na-ekesa nke ọma.Mgbe corrosion gasịrị, oghere nke akụkụ mbụ ahụ na-adị warara ma dị ogologo, ọwa ahụ na-adịkwa omimi.E jiri ya tụnyere ọnụ ọgụgụ 6 (B2, C2), ihe owuwu ahụ nwere ntụpọ ndị ọzọ, nke kwekọrọ na nha nkesa nke mkpuchi mkpuchi mkpuchi nke enwetara site na ule corrosion electrochemical.Ọ na-egosi na mkpuchi alumina seramiiki nwere graphene, karịsịa ngwakọta nke graphene na carbon nanotube, nwere nguzogide corrosion kacha mma.Nke a bụ n'ihi na nhazi nke carbon nanotube na graphene nwere ike igbochi mgbasa mgbape nke ọma ma chebe matriks.
5. Mkparịta ụka na nchịkọta
Site na ule nguzogide corrosion nke carbon nanotubes na ihe mgbakwunye graphene na mkpuchi seramiiki alumina na nyocha nke microstructure elu nke mkpuchi ahụ, a na-enweta nkwubi okwu ndị a:
(1) Mgbe oge corrosion bụ 19 h, na-agbakwunye 0.2% ngwakọ carbon nanotube + 0.2% graphene agwakọta ihe alumina seramiiki mkpuchi, njupụta corrosion ugbu a mụbara site na 2.890 × 10-6 A / cm2 ruo 1.536 × 10-6 A / cm2, ihe mgbochi eletrik na-abawanye site na 11388 Ω ruo 28079 Ω, yana arụmọrụ nguzogide corrosion bụ nke kachasị, 46.85%.E jiri ya tụnyere mkpuchi seramiiki alumina dị ọcha, mkpuchi ihe mejupụtara ya na graphene na carbon nanotubes nwere nguzogide corrosion ka mma.
(2) Site na mmụba nke oge imi nke electrolyte, electrolyte na-abanye n'ime nkwonkwo mkpuchi / mkpụrụ iji mepụta ihe nkiri metal oxide, nke na-egbochi ntinye nke electrolyte n'ime mkpụrụ.Igwe ọkụ eletrik na-ebu ụzọ belata wee na-abawanye, na nguzogide corrosion nke mkpuchi seramiiki alumina dị ọcha adịghị mma.Nhazi na mmekọrịta nke carbon nanotubes na graphene gbochiri mbanye nke electrolyte ala.Mgbe a na-agbanye ya maka 19.5 h, ọkụ eletrik nke mkpuchi nke nwere ihe nano na-ebelata site na 22.94%, 25.60% na 9.61% n'otu n'otu, na nguzogide corrosion nke mkpuchi ahụ dị mma.
6. Mmetụta mmetụta nke mkpuchi mkpuchi corrosion
Site na Tafel curve na mgbanwe mgbanwe nke uru impedance eletriki, a na-achọpụta na mkpuchi alumina seramiiki na graphene, carbon nanotubes na ngwakọta ha nwere ike imeziwanye nguzogide corrosion nke metal matrix, na mmetụta synergistic nke abụọ nwere ike imeziwanye corrosion. iguzogide ihe mkpuchi seramiiki nrapado.Iji chọpụtakwuo mmetụta nke nano additives na nguzogide corrosion nke mkpuchi ahụ, micro surface morphology nke mkpuchi mgbe a hụrụ corrosion.
Ihe osise 5 (A1, A2, B1, B2) na-egosi ọdịdị elu nke 304 igwe anaghị agba nchara na mkpuchi alumina dị ọcha na-ebuli elu mgbe corrosion gasịrị.Ọgụgụ 5 (A2) na-egosi na elu mgbe corrosion na-aghọ ihe siri ike.N'ihi na iferi mkpụrụ, ọtụtụ nnukwu corrosion olulu na-apụta n'elu mgbe imikpu na electrolyte, na-egosi na corrosion iguzogide nke iferi metal matrix adịghị mma na electrolyte dị mfe ịbanye n'ime matriks.Maka mkpuchi seramiiki alumina dị ọcha, dị ka egosiri na Figure 5 (B2), ọ bụ ezie na a na-emepụta ọwa corrosion porous mgbe corrosion gasịrị, usoro dị oke oke na nguzogide corrosion dị mma nke mkpuchi seramiiki alumina dị ọcha na-egbochi mwakpo nke electrolyte, nke na-akọwa ihe kpatara ya. mma mma nke impedance nke alumina seramiiki mkpuchi.
Ọdịdị dị elu nke mwnt-cooh-sdbs, mkpuchi nwere 0.2% graphene na mkpuchi nwere 0.2% mwnt-cooh-sdbs na 0.2% graphene.Enwere ike ịhụ na mkpuchi abụọ nke nwere graphene dị na eserese 6 (B2 na C2) nwere nhazi dị larịị, njikọ dị n'etiti ihe ndị dị na mkpuchi ahụ siri ike, na ihe nchịkọta na-ejikọta ya na nrapado.Ọ bụ ezie na electrolyte na-emebi elu ya, a na-emepụta ọwa pore dị ntakịrị.Mgbe corrosion gachara, mkpuchi mkpuchi dị oke ma enwere ụdị ntụpọ ole na ole.Maka eserese 6 (A1, A2), n'ihi njirimara nke mwnt-cooh-sdbs, mkpuchi tupu corrosion bụ ihe owuwu porous na-ekesa nke ọma.Mgbe corrosion gasịrị, oghere nke akụkụ mbụ ahụ na-adị warara ma dị ogologo, ọwa ahụ na-adịkwa omimi.E jiri ya tụnyere ọnụ ọgụgụ 6 (B2, C2), ihe owuwu ahụ nwere ntụpọ ndị ọzọ, nke kwekọrọ na nha nkesa nke mkpuchi mkpuchi mkpuchi nke enwetara site na ule corrosion electrochemical.Ọ na-egosi na mkpuchi alumina seramiiki nwere graphene, karịsịa ngwakọta nke graphene na carbon nanotube, nwere nguzogide corrosion kacha mma.Nke a bụ n'ihi na nhazi nke carbon nanotube na graphene nwere ike igbochi mgbasa mgbape nke ọma ma chebe matriks.
7. Mkparịta ụka na nchịkọta
Site na ule nguzogide corrosion nke carbon nanotubes na ihe mgbakwunye graphene na mkpuchi seramiiki alumina na nyocha nke microstructure elu nke mkpuchi ahụ, a na-enweta nkwubi okwu ndị a:
(1) Mgbe oge corrosion bụ 19 h, na-agbakwunye 0.2% ngwakọ carbon nanotube + 0.2% graphene agwakọta ihe alumina seramiiki mkpuchi, njupụta corrosion ugbu a mụbara site na 2.890 × 10-6 A / cm2 ruo 1.536 × 10-6 A / cm2, ihe mgbochi eletrik na-abawanye site na 11388 Ω ruo 28079 Ω, yana arụmọrụ nguzogide corrosion bụ nke kachasị, 46.85%.E jiri ya tụnyere mkpuchi seramiiki alumina dị ọcha, mkpuchi ihe mejupụtara ya na graphene na carbon nanotubes nwere nguzogide corrosion ka mma.
(2) Site na mmụba nke oge imi nke electrolyte, electrolyte na-abanye n'ime nkwonkwo mkpuchi / mkpụrụ iji mepụta ihe nkiri metal oxide, nke na-egbochi ntinye nke electrolyte n'ime mkpụrụ.Igwe ọkụ eletrik na-ebu ụzọ belata wee na-abawanye, na nguzogide corrosion nke mkpuchi seramiiki alumina dị ọcha adịghị mma.Nhazi na mmekọrịta nke carbon nanotubes na graphene gbochiri mbanye nke electrolyte ala.Mgbe a na-agbanye ya maka 19.5 h, ọkụ eletrik nke mkpuchi nke nwere ihe nano na-ebelata site na 22.94%, 25.60% na 9.61% n'otu n'otu, na nguzogide corrosion nke mkpuchi ahụ dị mma.
(3) N'ihi njirimara nke carbon nanotubes, mkpuchi agbakwunyere na carbon nanotubes naanị nwere usoro porous na-ekesa n'otu n'otu tupu corrosion.Mgbe corrosion gasịrị, oghere nke akụkụ mbụ ahụ na-adị warara ma dị ogologo, na ọwa na-adị omimi karị.Ihe mkpuchi nke nwere graphene nwere usoro dị larịị tupu corrosion, nchikota n'etiti ihe ndị dị na mkpuchi dị nso, na ihe nchịkọta na-ejikọta ya na nrapado.Ọ bụ ezie na elu na-emebi site na electrolyte mgbe corrosion gasịrị, enwere ọwa pore ole na ole na nhazi ahụ ka dị oke.Ọdịdị nke carbon nanotubes na graphene nwere ike igbochi mgbape mgbape nke ọma ma chebe matriks.
Oge nzipu: Mar-09-2022