Puas yog aluminium hlau tiag tiag xeb?

Puas yog aluminium rust? Cov lus teb yog yog, aluminium yuav xeb, tab sis aluminium xeb tsis yog xeb tiag tiag. Aluminium yuav tsis xeb nyob rau hauv ib txwm muaj xwm txheej. Ib txheej ntawm aluminium oxide zaj duab xis yuav tsim rau saum npoo ntawm txhuas. Qhov no oxide zaj duab xis yog ntom thiab tiv thaiv, uas tuaj yeem tiv thaiv cov txhuas sab hauv los ntawm kev txuas ntxiv mus rau cov pa oxygen, yog li aluminium yuav tsis “xeb” zoo li hlau. Txawm li cas los, yog tias cov oxide zaj duab xis puas lawm, xws li xuab zeb los yog muaj zog corrosion, aluminium yuav ntxiv oxidize, qhia qhov tsaus ntuj, tawg, lwm.

Ntau tus neeg xav tias aluminium tsis yooj yim rau xeb, tab sis qhov tseeb aluminium yog qhov yooj yim rau xeb dua li hlau! Txawm li cas los, aluminium rusts, tsis zoo li hlau xeb, nws tsis npog nrog xeb, thiab saum npoo tseem zoo li lub silvery-white metallic luster.

Dab tsi yog aluminium xeb?

Hlau xeb thaum nws yog oxidized los ntawm oxygen nyob rau hauv cov huab cua. Aluminium reacts chemically nrog oxygen los tsim aluminium oxide, uas yog aluminium xeb. Aluminium xeb yog nyias heev, tsuas yog ib kaum-txhiab ntawm ib millimeter tuab, tab sis nws yog ib qho nyuaj heev thiab hnav-resistant. Nws clings rau saum npoo ntawm aluminium, tiv thaiv cov txhuas sab hauv los tiv thaiv cov huab cua sab nraud, thiab tiv thaiv cov txhuas kom tsis txhob xeb ntxiv.

Ua aluminium xeb yooj yim? Kev xeb, raws li feem ntau paub, yog hais txog cov txheej txheem uas hlau reacts nrog oxygen thiab dej vapor nyob rau hauv cov huab cua noo los tsim xeb (feem ntau yog hlau oxide). Cov txheej txheem no ua rau lub ntim ntawm cov hlau nthuav dav, yog li ntawd rhuav tshem cov qauv thiab kev ua haujlwm ntawm cov khoom hlau.
Txawm li cas los, aluminium thiab hlau yog cov tshuaj sib txawv. Yuav aluminium xeb yog tias nws ntub? When the surface of aluminum comes into contact with the air, it will quickly react with the oxygen in the air to produce a dense aluminum oxide film. This reaction process is often considered to be “aluminum rusting”. But in fact, this film on the surface of aluminum is very hard and corrosion-resistant, and can tightly cover the surface of aluminum, preventing aluminum from further reacting with oxygen or water. Therefore, the actual fact is that this self-protection mechanism of aluminum makes it not as easy to rust as iron.

What is the principle of aluminum rusting?

Aluminum is an active metal that reacts with oxygen in the air at room temperature. This reaction is called an oxidation reaction, and the result is a dense aluminum oxide film on the surface of aluminum. Qhov no aluminium oxide zaj duab xis yog ib qho nyuaj heev thiab corrosion-resistant. Nws adheres nruj nreem rau saum npoo ntawm aluminium, zoo tiv thaiv txhuas los ntawm kev sib cuag nrog oxygen los yog lwm yam corrosive, li no tiv thaiv cov aluminium sab hauv los ntawm oxidation ntxiv. Txawm hais tias aluminium oxide zaj duab xis muaj kev tiv thaiv zoo ntawm txhuas, nyob rau hauv tej yam tshwj xeeb, xws li khawb los yog kev puas tsuaj ntawm aluminium nto, exposing lub internal aluminium, los yog txhuas nyob rau hauv ib puag ncig hnyav xws li cov av noo thiab kub siab rau lub sijhawm ntev, nws yuav ua rau oxidation ntxiv ntawm txhuas, uas yog qhov peb feem ntau hu “aluminium xeb”. Lub hauv paus ntsiab lus ntawm txhuas xeb yog tias txhuas reacts nrog oxygen nyob rau hauv cov huab cua los ua ib tug ntom aluminium oxide zaj duab xis. Cov yeeb yaj kiab no muaj kev tiv thaiv zoo ntawm txhuas thiab tuaj yeem tiv thaiv txhuas los ntawm oxidation ntxiv. Txawm li cas los, nyob rau hauv tej yam tshwj xeeb, aluminium tseem tuaj yeem raug oxidation ntxiv.

Nws siv sijhawm ntev npaum li cas rau txhuas kom xeb?

Nws siv sijhawm ntev npaum li cas rau txhuas kom xeb? Aluminium tuaj yeem xeb, tab sis nws cov txheej txheem rusting kuj qeeb. Lub sij hawm xeb ntawm txhuas yog cuam tshuam los ntawm ntau yam, suav nrog cov xwm txheej ib puag ncig, cov ntaub ntawv ua thiab siv cov xwm txheej. Raws li ib txwm muaj, aluminium rusts kuj maj mam, tab sis cov txhuas uas tau raug rau qhov chaw hnyav rau lub sijhawm ntev lossis tsis tau kho kom zoo yog feem ntau yuav xeb.. Feem ntau hais lus, nyob rau hauv ib txwm muaj, aluminium uas tsis tau kho tshwj xeeb yuav siv sijhawm ntau xyoo lossis ntau pua xyoo los qhia pom tseeb xeb.

Ua aluminium alloy xeb yooj yim?

Ua aluminium xeb yooj yim? Nyob rau hauv ib puag ncig ntuj, ib tug ntom aluminium oxide zaj duab xis sai sai rau ntawm qhov chaw ntawm txhuas. Cov yeeb yaj kiab no nyuaj heev thiab corrosion-resistant, thiab tuaj yeem tiv thaiv tau txhuas los ntawm kev ua pa ntxiv nrog oxygen thiab dej, li no tiv thaiv aluminium los ntawm xeb. Therefore, aluminium muaj zoo corrosion kuj. Feem ntau, aluminium tsis xeb yooj yim li hlau. Txawm hais tias txhuas yog raug rau qhov chaw ntub dej rau lub sijhawm ntev, tsuav yog cov aluminium oxide zaj duab xis ntawm nws qhov chaw nyob tsis zoo, aluminium yuav tsis xeb.

Ntev npaum li cas aluminium yuav nyob sab nraud?

Ntev npaum li cas aluminium tuaj yeem siv sab nraum zoov? Kev pabcuam lub neej ntawm aluminium sab nraum zoov yog cuam tshuam los ntawm ntau yam, xws li tej yam kev mob, khoom zoo, tsim thiab tsim khoom, thiab kev pab cuam lub neej ib txwm yog nyob nruab nrab ntawm 10 thiab 20 xyoo, tab sis lub sijhawm no yuav txawv nyob ntawm qhov xwm txheej tshwj xeeb.

Cov yam ntxwv uas cuam tshuam rau lub sijhawm xeb ntawm txhuas

Humidity thiab kub: Aluminium feem ntau yuav hnov ​​​​mob nrog oxygen thiab dej vapor nyob rau hauv ib qho chaw ntub dej, li no accelerating tus txheej txheem rusting. Tib lub sijhawm, ib puag ncig kub kub kuj tseem yuav txhawb nqa cov tshuaj tiv thaiv oxidation.
Cua zoo: Acid los nag thiab tshuaj lom neeg ua paug hauv huab cua tuaj yeem ua rau cov yeeb yaj kiab aluminium oxide, txo nws txoj kev tiv thaiv, thiab yog li ceev cov rusting ntawm txhuas.

Kev kho saum npoo: Cov ntaub ntawv txhuas uas tau dhau los kho qhov chaw xws li anodizing, electrophoresis, tshuaj tsuag, thiab electroplating muaj ib tug thicker thiab ntau corrosion-resistant oxide zaj duab xis ntawm lawv nto, uas tuaj yeem txuas ntxiv lub neej kev pab cuam ntawm txhuas.

Kos thiab puas: Kev khawb thiab kev puas tsuaj rau saum npoo ntawm txhuas yuav rhuav tshem cov aluminium oxide zaj duab xis, ua aluminium ntau raug rau corrosion thiab xeb.

Tiv tauj nrog electrolyte: Aluminium, raws li cov khoom siv conductive, Nws yooj yim rau cov tshuaj tiv thaiv electrochemical thaum sib cuag nrog electrolytes, li no txhawb cov txheej txheem rusting.

Cia tej yam kev mob: Cov ntaub ntawv txhuas uas raug rau qhov chaw hnyav rau lub sijhawm ntev, xws li thaj chaw ntug dej hiav txwv lossis thaj chaw los nag, yuav xeb sai dua.