Amabara no Gufunga Anodic Oxide Filime

Amabara no Gufunga Anodic Oxide Filime

Aluminiyumu n'ibiyikomokaho nyuma yo kuvura okiside ya anodic, yabyaye igice cya firime ya okiside ya okiside hejuru yacyo, nyuma yo kuvura amabara no kuyifunga, urashobora kubona amabara atandukanye, kandi urashobora kunoza ruswa ya firime, kwambara ukarwanya.

Igishushanyo mbonera cyerekana amabara ya electrolytike:

 Oxide ya firime

(1) Ibara rya pigment idasanzwe

cyane cyane adsorption yumubiri, ni ukuvuga molekules ya pigment ya organic organique yamamajwe hejuru ya microporome ya firime ya firime igomba kuzuzwa. Uburyo bwo gusiga amabara hue ntabwo bworoshye, kandi guhuza na substrate ni bibi, ariko kurwanya izuba nibyiza. Irangi ryifashishwa mu gusiga amabara ya organic organique rigabanijwemo ubwoko bubiri, kandi icyuma nyuma ya okiside ya anodic kigomba kwinjizwa muburyo bubiri bwibisubizo ubundi kugeza igihe umubare wibicuruzwa (pigment) byubwoko bubiri bwumunyu muri firime ya okiside byujuje ibisabwa.

(2) Irangi ryamabara

 uburyo burakomeye, mubisanzwe bizera ko bifite adsorption yumubiri na reaction ya chimique. Irangi ryamabara ya organique hamwe na alumina ya chimique yuburyo bukurikira alumina na marekile irangi kumatsinda ya fenolike kugirango bibe isano ya covalent; alumina na irangi rya molekile kumatsinda ya fenolike kugirango bahuze imigozi ya hydrogen; alumina no gusiga irangi molekile kugirango ikore ibigo. Ibirangantego kama bifite ibara ryinshi ryamabara meza, ariko bifite imirasire yizuba. Nibyiza gukoresha amazi yatoboye cyangwa amazi ya deionised kugirango utegure igisubizo cyo gusiga irangi kuruta amazi ya robine, kuko ion na calcium na magnesium ion mumazi ya robine bizahuzwa na molekile yamabara kugirango bibe bihuza, bizatuma igisubizo cyo gusiga irangi gishaje.

(3) Amabara ya electrolytike

ni okiside ya anodic ya aluminiyumu hamwe na alloys mu gisubizo cya electrolytike irimo umunyu wicyuma cya electrolysis, binyuze mumashanyarazi ya elegitoroniki, kuburyo ioni yicyuma kiremereye mumyobo ya firime ya oxyde kuri atome yicyuma, igashyirwa munsi yurwobo kumurongo utari mwiza kandi ugasiga amabara (Ishusho 5.10). Filime yamabara ya oxyde yabonetse muburyo bwa electrolytike yamabara ifite ibyiza byo kurwanya abrasion nziza, kurwanya izuba, kurwanya ubushyuhe, kurwanya ruswa hamwe nibara rihamye kandi rirambye, kandi ubu rikoreshwa cyane mumashusho ya aluminiyumu mugushushanya ubwubatsi. Umuvuduko mwinshi nigihe kinini gikoreshwa mugukoresha amabara ya electrolytike, ibara ryijimye.

 

Gufunga kashe ya firime ya oxyde

Nyuma ya okiside ya anodic ya aluminiyumu hamwe nayivanze, niyo yaba ibara cyangwa idafite ibara, birakenewe ko hajyaho uburyo bwo kuvura kashe mugihe, ikigamijwe ni ugukosora amarangi muri micropores, kwirinda gusohora, kandi mugihe kimwe, kunoza imishwarara ya firime, urumuri rwizuba, kwangirika no kubika ibintu. Uburyo bwo gufunga burimo uburyo bwo gufunga amazi ashyushye, uburyo bwo gufunga ibyuka byamazi, uburyo bwo gufunga dichromate, uburyo bwo gufunga hydrolysis hamwe nuburyo bwo kuzuza kashe.

(1) Ihame ryuburyo bwo gufunga amazi ashyushye

ni ugukoresha hydration ya amorphous AL2O3: AL2O3 + nH2O = AL2O3-nH2O

Ari 1 cyangwa 3. Iyo AL2O3 hydration ya alumina hydrated AL2O3-H2O, ingano yayo irashobora kwiyongera hafi 33%; yabyaye trihydrate alumina AL2O3-3H2O, ingano yayo yiyongereyeho 100%. Nkibisubizo bya hydration ya AL2O3 hejuru ya firime ya oxyde nurukuta rwa pore, amajwi ariyongera kandi agafunga imyenge ya firime.

Amazi ashyushye afunze inzira yubushyuhe bwamazi ashyushye ya 90 ~ 100 ° C, pH 6 ~ 7.5, isaha 15 ~ 30 min. amazi afunze agomba gutoborwa amazi cyangwa amazi ya deionised, kandi ntashobora gukoresha amazi ya robine, bitabaye ibyo bizagabanya umucyo wa firime ya oxyde nibara.

(2) Ihame ryuburyo bwo gufunga imyuka y'amazi

Nuburyo bumwe bwo gufunga amazi ashyushye, ariko ingaruka ni nziza cyane, ariko ikiguzi ni kinini.

(3) Uburyo bwo gufunga Dichromate

Bikorerwa muri potasiyumu dichromate yumuti hamwe na okiside ikomeye kandi mubushyuhe bwinshi. Iyo ibice bya aluminiyumu ya anodize bigaburiwe igisubizo, firime ya oxyde na aluminium oxyde yinkuta za pore bigira reaction ikurikira hamwe na potasiyumu dichromate mumuti wamazi:

2AL2O3 + 3K2Cr2O7 + 5H20 = 2ALOHCrO4 + 2ALOHCr2O7 + 6KOH

Chromate ya alkali aluminium na alkali aluminium dichromate igwa hamwe na alumina monohydrate na alumina trihydrate ikorwa na molekile y'amazi ashyushye hamwe na alumina bifunga micropores ya firime ya oxyde. Inzira nuburyo bwo gukemura igisubizo ni ibi bikurikira: potasiyumu dichromate 50 ~ 70g / L; ubushyuhe 90 ~ 95 ° C; igihe 15 ~ 25 min; pH agaciro 6 ~ 7.

Filime ya oxyde ivurwa nubu buryo ni umuhondo mu ibara kandi ifite imbaraga zo kurwanya ruswa. Irakwiriye gufungwa nyuma ya anodic okiside ya aluminiyumu ya aluminiyumu hagamijwe gukingirwa, kandi ntabwo ikwiriye gufunga firime ya oxyde yamabara hagamijwe gushushanya.

(4) Uburyo bwo gufunga Hydrolysis

Yerekeza kuri hydrolysis ikurikira nyuma yo gukemura cyane umunyu wa nikel n'umunyu wa cobalt byamamajwe na firime ya oxyde:

NI2 + + 2H2O = NI (OH) 2 + 2H +

Co2 + + 2H2O = Co (OH) 2 + 2H +.

Nikel hydroxide yakozwe cyangwa cobalt hydroxide ishyirwa muri micropores ya firime ya oxyde, bityo igafunga imyenge. Kuberako umubare muto wa hydroxide ya nikel na hydroxide ya cobalt bisa nkibara, ubwo buryo rero burakwiriye cyane cyane gufunga firime ya oxyde.

(5) Kuzuza uburyo bufunze

Usibye uburyo bwavuzwe haruguru bwafunzwe, firime ya anodic oxyde irashobora kandi gukoreshwa mubintu kama, nka varnish ibonerana, paraffine yashongeshejwe, ibisigazwa bitandukanye namavuta yumye, nibindi bifunze.