Thaum peb xav txog lo lus “xeb,” thawj daim duab uas feem ntau los rau hauv siab yog cov xim liab-xim av flaky txheej uas ua rau hlau lossis hlau thaum raug huab cua ntub, ib tug phenomenon scientifically hu ua hlau oxide.Cov tshuaj tiv thaiv muaj peev xwm sawv cev raws li nram no:

4𝐹𝑒+3𝑂2+6𝐻2𝑂 →4𝐹𝑒(𝑂𝐻)3cov

Cov tshuaj tiv thaiv no ua rau tsim cov hlau hydrated(III) oxide, uas feem ntau hu ua xeb.

Txawm li cas los, thaum nws los txog rau aluminium, cov lus nug tshwm sim: Puas yog aluminium rust? Teb rau qhov no, peb yuav tsum tau delve rau hauv dab tsi xeb tiag tiag, nws cuam tshuam li cas rau cov hlau sib txawv, thiab tshwj xeeb, yuav ua li cas aluminium reacts nyob rau hauv cov xwm txheej zoo sib xws.

Dab tsi yog Rust?

Rust yog ib hom kev xeb uas tshwm sim nrog hlau thiab hlau thaum lawv raug oxygen thiab ya raws. Cov tshuaj tiv thaiv ua rau muaj hlau oxide. Qhov txawv feature ntawm xeb tsis yog tsuas yog nws cov xim, tab sis kuj yog txoj kev nws ua rau cov hlau nthuav thiab flake., uas thaum kawg tuaj yeem cuam tshuam cov txheej txheem kev ncaj ncees ntawm cov hlau.

Aluminium thiab Corrosion

Aluminium, tsis zoo li hlau, tsis xeb. Qhov no yog vim aluminium tsis muaj hlau, thiab yog li ntawd, cov tshuaj tiv thaiv tshwj xeeb uas tsim cov hlau oxide (xeb) tsis tuaj yeem tshwm sim. Txawm li cas los, Qhov no tsis tau txhais hais tias txhuas yog tiv thaiv rau txhua hom kev xeb. Es tsis txhob xeb, aluminium undergoes tus txheej txheem hu ua oxidation.Cov tshuaj tiv thaiv rau kev tsim ntawm txhuas oxide yog raws li nram no:

4𝐴𝑙+3𝑂2 →2𝐴𝑙2𝑂3cov

Cov tshuaj tiv thaiv no yog spontaneous thiab exothermic, txhais tau tias nws tso cua sov. Aluminium oxide txheej yog ib qho nyuaj heev thiab muab kev tiv thaiv zoo tiv thaiv corrosion ntxiv.

Cov txheej txheem ntawm Oxidation hauv Aluminium

Thaum txhuas raug rau cov cua, nws reacts nrog oxygen los tsim aluminium oxide ntawm nws qhov chaw. Qhov txheej txheej aluminium oxide no txawv heev los ntawm xeb hauv ntau txoj hauv kev:

1. Xim thiab textures: Aluminium oxide tsis flaky lossis liab zoo li hlau oxide. Hloov chaw, nws tsim ib tug dawb los yog ntshiab, txheej tiv thaiv uas feem ntau tsis pom.
2. Tiv thaiv Barrier: Tsis zoo li hlau oxide, uas deteriorates thiab puas cov hlau, aluminium oxide yeej tiv thaiv cov hlau hauv qab los ntawm kev xeb ntxiv. Cov txheej txheem no sai sai thaum cov txhuas tshiab raug rau huab cua thiab zoo kawg li tiv thaiv corrosion ntxiv.

Vim li cas Aluminium thiaj li xaiv rau kev siv sab nraum zoov

Lub hauv paus ntawm cov khoom ntawm aluminium ua rau nws xaiv zoo rau kev siv sab nraum zoov. Nov yog ob peb lub laj thawj vim li cas:

• Durability: Vim nws tiv thaiv oxide txheej, aluminium yog heev resistant rau huab cua-txog degradation, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas feem ntau yuav maj nrawm rau xeb ntawm hlau.
• Lub teeb: Aluminium yog lub teeb heev piv rau lwm yam hlau, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov ntawv thov uas qhov hnyav yog qhov tseem ceeb, xws li hauv aircraft, kev tsim kho tsheb, thiab portable lug.
• Non-Toxic thiab Recyclable: Aluminium yog non-toxic thiab recyclable heev, uas ua rau nws muaj koob meej hauv kev ntim khoom noj thiab kev tsim kho.

Cov yam ntxwv uas cuam tshuam rau Aluminium Corrosion

Thaum aluminium yog resistant rau corrosion, tej yam kev mob tuaj yeem ua kom cov txheej txheem ua kom nrawm lossis ua rau lwm yam corrosion:

• Galvanic corrosion kuj: Qhov no tshwm sim thaum txhuas nyob rau hauv kev sib cuag nrog ib tug ntau noble hlau nyob rau hauv lub xub ntiag ntawm ib tug electrolyte, ua rau muaj zog corrosion.
• Environmental Factors: Raug rau industrial pollutants, saline ib puag ncig (zoo li cov ntug hiav txwv dej), thiab huab cua pH tuaj yeem txhim kho corrosion.

Aluminium vs. Lwm yam hlau: Corrosion Resistance

Sib piv cov kev tiv thaiv corrosion ntawm txhuas rau lwm cov hlau pab qhia txog nws qhov zoo thiab kev txwv.

Rooj : Corrosion Resistance ntawm Common Metals