1. Nkwadebe mkpuchi
Iji kwado ule electrochemical mechara, a na-ahọrọ 30mm × 4 mm 304 igwe anaghị agba nchara dịka ntọala. Polish na-ewepụ 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 ndị wear irighiri ihe n'elu nke metal mkpụrụ na mmanya na distilled ha na-egbu maramara na mmiri. Mgbe ahụ, a na-akwado alumina (Al2O3), graphene na ngwakọ carbon nanotube (mwnt-coohsdbs) n'oke nha (100: 0: 0, 99.8: 0.2: 0, 99.8: 0: 0.2, 99.6: 0.2: 0.2sp) ma tinye NAnji bọọlụ (2) factory) 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 electrode inyeaka, ọla ọcha chloride electrode bụ electrode ntụaka, na ihe mkpuchi 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 ahụ bụ 19h, voltaji corrosion kacha elu nke matrix metal efu bụ -0.680 V, na njupụta corrosion dị ugbu a nke matrix bụkwa nke kachasị ukwuu, na-eru 2.890 × 10-6 A / cm2. 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, ọnụahịa kachasị elu, na-abawanye site na 113828 Ω 7 Ω na mkpuchi PE9 11380 Ω. gbanwere -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 nguzogide 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 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 matrix, na-eme ka mbelata dị ukwuu na nguzogide nke 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 matrix na mkpuchi / matrix junction na-emepụta a mkpa metal oxide film, nke na-egbochi penetration nke electrolyte n'ime matriks na-abawanye na-eguzogide uru. 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 nke corrosion ugbu a na nguzogide nke zsimpwin na-enweta software na-egosi na Tebụl 2. Enwere ike ịhụ na mgbe a na-agbanye ya maka 19 h, ma e jiri ya tụnyere ihe na-adịghị ahụ anya, njupụta corrosion nke ugbu a nke alumina dị ọcha na mkpuchi alumina nke nwere ihe mgbakwunye nano dị ntakịrị na uru nguzogide dị ukwuu. Uru iguzogide ihe mkpuchi seramiiki nwere carbon nanotubes na mkpuchi nwere graphene fọrọ nke nta ka ọ bụrụ otu ihe, 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 mgbochi corrosion nke ihe ahụ 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 kemịkalụ.
E jiri ya tụnyere ihe mkpuchi alumina nke nwere 0.2% mwnt-cooh-sdbs, ihe 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, belata site na 0.2% 22.9.6. 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 matrix. A na-enyochakwu mmetụta synergistic nke abụọ ahụ. Ihe mkpuchi nke nwere ihe abụọ nano nwere ihe mgbochi 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 ahụ nwere ike imeziwanye nguzogide corrosion nke 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
Ọnụọgụ 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 ọcha nke mkpuchi seramiiki alumina dị ọcha na-egbochi mwakpo nke electrolyte, nke na-akọwa ihe kpatara mmụba dị mma nke impedance nke mkpuchi seramiiki alumina.
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 ahụ 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 obere. 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 n'otu n'otu. 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, na-abawanye site na ọkụ eletrik 8001 ruo 8. Ω, na arụmọrụ nguzogide corrosion bụ nke kachasị, 46.85%. N'iji ya na 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 ahụ nwere ike imeziwanye nguzogide corrosion nke mkpuchi seramiiki nrapado. Iji chọpụtakwuo mmetụta nke nano additives na nguzogide corrosion nke mkpuchi ahụ, micro surface morphology nke mkpuchi mgbe a hụrụ corrosion.
Ọnụọgụ 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 ọcha nke mkpuchi seramiiki alumina dị ọcha na-egbochi mwakpo nke electrolyte, nke na-akọwa ihe kpatara mmụba dị mma nke impedance nke mkpuchi seramiiki alumina.
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 ahụ 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 obere. 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 n'otu n'otu. 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, na-abawanye site na ọkụ eletrik 8001 ruo 8. Ω, na arụmọrụ nguzogide corrosion bụ nke kachasị, 46.85%. N'iji ya na 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