I-aluminiyam yeyesibini ngobukhulu isinyithi kwiplanethi, kwaye ngenxa yeempawu zayo ezintle, yenye yezona zimbiwa ezisetyenziswa kakhulu namhlanje. Ngoko ke, luncedo ukuqonda iimeko ezinciphisa ubomi bezi zinyithi.

I-corrosion yayo nayiphi na isinyithi iya kuchaphazela kakhulu amandla ayo okusebenza, kwaye kwiimeko ezigqithisileyo kuya kukhokelela kumonakalo wesakhiwo, njengokuqhekeka, ukuphuka okuyingxenye kunye nokungaphumeleli okupheleleyo kwezinto.

Yintoni umhlwa ialuminiyam? I-aluminiyam i-corrosion ibhekisela ekubola ngokuthe ngcembe kweeathomu ze-aluminiyam zibe yi-oxides, ngaloo ndlela inciphisa iimpawu zayo zomzimba kunye neekhemikhali. Ngokwenyani, i-aluminiyam yintsimbi esebenzayo, kodwa ikwayintsimbi yokwenziwa.

Iintlobo ze-aluminiyam ye-corrosion
Ukonakala kwe-atmospheric
Eyona ndlela iqhelekileyo ye-aluminiyam ye-corrosion. Ukuvezwa kwe-aluminiyam kwizinto zendalo kunokubangela ukuthotywa kwe-atmospheric. Kuba inokwenzeka kwiindawo ezininzi, ukuthotywa kwe-atmospheric kwenza esona sabelo sikhulu somonakalo opheleleyo we-aluminiyam obangelwa zizo zonke iintlobo zokuhlwa emhlabeni.

Umhlwa wombane
I-galvanic corrosion, eyaziwa ngokuba yi-corrosion yesinyithi engafaniyo, ichaphazela i-aluminiyam ngokwasemzimbeni okanye ngee-electrolytes eziqhagamshelwe kwiintsimbi ezixabisekileyo. Intsimbi ehloniphekileyo inokuba nayiphi na isinyithi ene-reactivity ephantsi kune-aluminiyam.

Ukugqobhoza
I-Pitting corrosion yi-surface corrosion phenomenon ye-aluminium metal, ebonakala ngemingxuma emincinci (imingxuma) phezu komhlaba. Ngokuqhelekileyo, ezi dimples azichaphazeli amandla emveliso. Endaweni yoko, lo ngumba wobuhle, kodwa ukuba inkangeleko yomphezulu ibalulekile, inokukhokelela ekusileleni.

Ukonakala kweCrevice
I-Crevice corrosion yindlela yenkqubo ye-corrosion yendawo kwizinto eziphathekayo. Izinto ezigqitheneyo okanye iimpazamo zokuyila ngengozi zingakhokelela ekwenziweni kwezikhewu. Ngenxa yoko, ukuqokelela amanzi olwandle kwezi ngxowa kunokubangela umhlwa.

Umhlwa wokukhukula
I-corrosion ye-exfoliation luhlobo olukhethekileyo lwe-intergranular corrosion kwi-alloys ye-aluminium, kunye nesakhiwo esicacileyo solwalathiso. Oku kubonakala ngokukodwa kwiimveliso ze-aluminiyam eziye zagqithiswa ngokushushu okanye ukuqengqeleka okubandayo.