I-Aluminium iyinsimbi yesibili ngobukhulu emhlabeni, futhi ngenxa yezakhiwo zayo ezinhle kakhulu, ingenye yezinsimbi ezisetshenziswa kakhulu namuhla. Ngakho-ke, kuyasiza ukuqonda izimo ezifinyeza ukuphila kwalezi zinsimbi.

Ukugqwala kwanoma iyiphi insimbi kuzothinta kakhulu amandla ayo okusebenza, futhi ezimweni ezimbi kakhulu kuzoholela ekulimaleni kwesakhiwo, njengokuqhekeka, ukuqhekeka okuyingxenye kanye nokwehluleka okuphelele kwezinto.

Kuyini ukugqwala kwe-aluminium? Ukugqwala kwe-aluminium kusho ukubola kancane kancane kwamangqamuzana e-aluminium abe ama-oxide, ngaleyo ndlela kunciphisa izici zayo ezingokomzimba namakhemikhali. Empeleni, i-aluminium iyinsimbi esebenzayo, kodwa futhi iyinsimbi engenzi lutho.

Izinhlobo zokugqwala kwe-aluminium
Ukugqwala kwe-atmospheric
Uhlobo oluvame kakhulu lokugqwala kwe-aluminium. Ukuchayeka kwe-aluminium ezintweni zemvelo kungabangela ukugqwala komkhathi. Njengoba kungenzeka ezindaweni eziningi, ukugqwala kwe-atmospheric kwenza ingxenye enkulu yomonakalo ophelele we-aluminium obangelwa yizo zonke izinhlobo zokugqwala emhlabeni.

Ukugqwala kukagesi
I-Galvanic corrosion, eyaziwa nangokuthi ukugqwala kwensimbi okungafani, kuthinta i-aluminium ngokomzimba noma ngama-electrolyte axhunywe ezinsimbi eziyigugu. Insimbi ehloniphekile ingaba yinoma iyiphi insimbi ene-reactivity ephansi kune-aluminium.

Ukubhoboza
I-Pitting corrosion i-surface corrosion phenomenon yensimbi ye-aluminium, ebonakala ngezimbobo ezincane (imigodi) phezulu. Ngokuvamile, lezi dimples awazithinti amandla umkhiqizo. Kunalokho, lokhu kuyinkinga yobuhle, kodwa uma ukubukeka kwangaphandle kubaluleke kakhulu, kungaholela ekuhlulekeni.

Ukugqwala kweCrevice
I-Crevice corrosion iwuhlobo lwenqubo yokugqwala yendawo ezintweni ezibonakalayo. Izinto ezinqwabelanisayo noma amaphutha omklamo ngephutha angaholela ekwakhekeni kwezikhala. Ngenxa yalokho, ukuqoqa amanzi olwandle kulezi zikhwama kungabangela ukugqwala kwemifantu.

Ukugqwala kwe-exfoliation
I-Exfoliation corrosion iwuhlobo olukhethekile lokugqwala kwe-intergranular kuma-alloys e-aluminium, enesakhiwo esiqondile esiqondisayo. Lokhu kubonakala ikakhulukazi emikhiqizweni ye-aluminium eye yaginqika ngokushisa noma igoqeka okubandayo.