Anodizing ntawm txhuas yog cov txheej txheem electrolytic oxidation nyob rau hauv qhov chaw ntawm txhuas thiab txhuas alloys feem ntau hloov mus rau hauv oxide zaj duab xis. Cov oxide zaj duab xis no muaj kev tiv thaiv, kho kom zoo nkauj, thiab lwm yam khoom siv. Raws li cov ntsiab lus no, aluminium anodizing tsuas yog suav nrog cov txheej txheem ntawm kev tsim cov anodic oxide zaj duab xis.
Ib qho hlau lossis hlau ua haujlwm yog siv los ua cov anode, thiab cov yeeb yaj kiab oxide yog tsim rau ntawm nws qhov chaw los ntawm electrolysis. Cov hlau oxide zaj duab xis hloov lub xeev thiab cov khoom, xws li cov xim nto, txhim kho corrosion, txhim kho hnav tsis kam thiab hardness, thiab kev tiv thaiv ntawm cov hlau nto. Piv txwv li, nyob rau hauv txhuas anodizing, txhuas thiab nws alloys yog muab tso rau hauv ib tug haum electrolyte (xws li sulfuric acid, chromic acid, oxalic acid, thiab lwm yam) raws li lub anode, thiab electrolysis yog ua nyob rau hauv tej yam kev mob thiab ib tug thov tam sim no. Aluminium los yog nws cov alloy ntawm lub anode oxidizes, tsim ib txheej nyias ntawm txhuas oxide nyob rau saum npoo, nrog ib tug tuab ntawm 5-30 micrometers; nyuaj anodic oxide zaj duab xis tuaj yeem ncav cuag 25-150 micrometers. Anodizing aluminium los yog nws cov alloys txhim kho lawv cov tawv tawv thiab hnav tsis kam, ncav cuag 250-500 kg / mm², txhim khu kev tiv thaiv tshav kub (nyuaj anodized films muaj ib tug melting point siab txog 2320 K), muab zoo heev rwb thaiv tsev nrog ib tug tawg voltage mus txog 2000 V, thiab ntxiv dag zog rau corrosion, tshuav uncorroded rau ntau txhiab xuaj moos hauv 1 Cl ω Cov yeeb yaj kiab oxide nyias muaj ntau lub micropores uas tuaj yeem nqus tau ntau yam roj nplua nyeem, ua rau nws tsim nyog rau kev tsim lub tog raj kheej lossis lwm yam hnav- qhov chaw tiv taus. Lub peev xwm adsorption muaj zog ntawm micropores tso cai rau xim rau ntau yam xim zoo nkauj thiab muaj zog. Cov hlau uas tsis yog-ferrous hlau lossis lawv cov alloys (xws li txhuas, magnesium, thiab lawv cov alloys) tuaj yeem ua rau tag nrho cov anodizing. Txoj kev no yog dav siv nyob rau hauv txhua yam khoom, aircraft thiab automotive Cheebtsam, precision instruments thiab xov tooj cua cov khoom, txhua hnub yuav tsum tau, thiab architectural kho kom zoo nkauj.
