Pali zosintha izi mu kukula kwake kwa aluminiyamu aloyi isanachitike komanso pambuyo pa okosijeni!?

Anthu ambiri ali ndi funso: "N'chifukwa chiyani pores amakula pambuyo oxidation?" Izi ziyenera kufotokozedwa kuchokera ku mfundo ya makutidwe ndi okosijeni, makutidwe ndi okosijeni ndi osiyana ndi kupopera mbewu mankhwalawa kapena electroplating, anodizing ikuchitika pamwamba pa aluminiyamu alloy, ndi njira yochitira kuchokera pamwamba kuti ipange filimu ya oxide.

Nthawi zambiri, kukula kwa filimu ya oxide kumaphatikizapo zinthu ziwiri izi: (1) mapangidwe a filimuyi (2) njira yowonongeka ya electrochemical ya filimuyo.

Panthawi ya magetsi, mpweya ndi aluminiyumu zimakhala ndi chiyanjano chachikulu, ndipo gawo lapansi la aluminiyamu limapanga msanga wosanjikiza wosanjikiza, womwe makulidwe ake amadalira mphamvu ya thanki.

Chifukwa cha kuchuluka kwa maatomu a aluminiyamu, amakula, chotchinga chotchinga chimakhala chosagwirizana, zomwe zimapangitsa kuti pakhale kugawanika kwamakono, kukana pang'ono mu concave, panopa, ndi zosiyana ndi convex.

Electrochemical kuvunda ndi mankhwala Kutha H2SO4 zimachitika patsekeke pansi zochita za magetsi, ndi patsekeke pang`onopang`ono amakhala dzenje ndi dzenje khoma, ndi chotchinga wosanjikiza anasamutsa kwa wosanjikiza porous.

Chitsulo kapena aloyi amagwiritsidwa ntchito ngati anode, ndipo filimu ya okusayidi imapangidwa pamwamba pake ndi electrolysis. Kanema wachitsulo wa oxide amasintha mawonekedwe ndi magwiridwe antchito, monga utoto wapamtunda, kukonza kukana kwa dzimbiri, kukulitsa kukana komanso kuuma, kuteteza pamwamba pazitsulo. Aluminiyamu anodizing, zotayidwa ndi aloyi ake ayikidwa mu lolingana electrolyte (monga asidi sulfuric, asidi chromic, asidi oxalic, etc.) monga anode, pa zinthu zenizeni ndi chidwi panopa, electrolysis. Aluminiyamu ya anodic kapena aloyi yake imapangidwa ndi oxidized kuti ikhale yocheperako ya aluminium oxide pamwamba, yokhala ndi makulidwe a ma microns 5 mpaka 30, ndipo filimu yolimba ya anodic oxide imatha kufika ma microns 25 mpaka 150.

Ntchito yoyambirira ya anodizing

Popanga filimu ya okusayidi, m'pofunika kuchita alkali etching ndi kupukuta ntchito kumayambiriro.

Kuwonongeka kwa alkali ndi njira yochotsera ndikuyika filimu yachilengedwe ya oxide (AL2O3) pamwamba pa aluminiyumu. Kuthamanga kwa dzimbiri zamchere kumadalira kuchuluka kwake komanso kutentha kwa madzi osambira a alkali, zomwe zimadalira kwambiri mulingo wa corrosion agent (sodium gluconate) ndi zomwe zili mu ayoni aluminiyamu (AL3+). Aluminiyamu pamwamba khalidwe, kumva, flatness ndi okusayidi film electroplating, dzimbiri alkali zonse zimatenga mbali yofunika.

Cholinga cha etching ya alkali ndikuchotsa filimu yopangidwa ndi okosijeni yomwe imapangidwa pamwamba pa zigawo za aluminiyamu pogwira ntchito yotentha kapena mwachilengedwe, komanso mafuta otsalira omwe amagwiritsidwa ntchito popanga mkaka ndi kupanga kupanga. Kaya ntchitoyi ikuchitika bwino imatsimikizira chinsinsi cha filimu ya anodic oxide yomwe imapezeka. Mfundo zofunika kuziganizira ndi izi. Chitani ntchito yabwino yoyang'anira musanachite dzimbiri zamchere, zomwe zapezeka kuti sizoyenera mankhwala opangira dzimbiri zamchere ziyenera kusankhidwa pasadakhale. Njira yopangira mankhwala musanayike alkali iyenera kukhala yoyenera komanso yokwanira. Dziwani bwino zaukadaulo wa ntchito ya alkali etching.

Imachitidwa pa makina opukutira, mbiri ya aluminiyamu imayikidwa patebulo la ntchito nthawi zonse, ndipo pamwamba pake imakhudzidwa ndikugwedezeka ndi gudumu lopukuta lothamanga kwambiri, kotero kuti pamwamba ndi yosalala komanso yosalala, komanso ngakhale galasi. zimatheka. Kupukuta kumagwiritsidwa ntchito popanga kuthetsa mikwingwirima ya extrusion, kotero kumatchedwanso "mechanical sweep" panthawiyi.

mwachidule

Kusintha kwa kukula kwa aluminiyumu aloyi kungasankhidwe, kutengera njira ya okosijeni, nthawi, ndi njira yochizira.

Kukula kwakung'ono: Panthawi yonse ya makutidwe ndi okosijeni, ndikofunikiranso kuti alowetse aloyi ya aluminiyamu mu njira ya sulfuric acid, izi zitha kuyambitsa dzimbiri kwa aloyi ya aluminiyamu, ndiye tikawonanso zitsulo zotayidwa, kukula kwake kudzakhala. zing'onozing'ono chifukwa cha dzimbiri.

Kukula kwakukulu: Kuti mupange okosijeni molimba, mutha kupanga kukula konse kwa aloyi ya aluminiyamu kukhala ndi chiwonjezeko chachikulu.

Ubwino wa alloy aluminium nthawi zambiri umasonyeza kuwonjezeka koonekeratu.