Ukuxhumana okubi
Ucwaningo lubonisa ukuthi izici eziphuthumayo kakhulu ohlelweni lukagesi lwemoto yizinhlobo ezihlukahlukene zokuxhuma ezitholakala kuyo.
Ukugqwala kungenye yezimbangela zokulimala kokuthintana okuqhutshwa ngogesi emalungeni. umnqamulajuqu lona 
evamile, ehlanganisa izinqubo ezihlukahlukene ezibangela izinguquko kokubili ebusweni kanye nesakhiwo sensimbi lapho uxhumano lwenziwa khona. Lezi kungaba yizinqubo zamakhemikhali noma ze-electrochemical. Umphumela weyokuqala ukwakheka kongqimba lokugqwala ezindaweni zensimbi (ngaphandle kwalokho okubizwa ngokuthi yizinsimbi ezihlonishwayo), okuhlanganisa izinhlanganisela zale nsimbi ne-oksijini kanye nemikhiqizo yayo yokusabela ngama-acids, izisekelo noma amanye amakhemikhali. Kodwa-ke, ezinqubweni ze-electrochemical, sibhekene nokwakheka kweseli elibizwa ngokuthi i-galvanic cell, elakha izinsimbi ezimbili ezihlukene phambi kwe-electrolyte. Ngokuhamba kwesikhathi, insimbi enamandla ephansi, okungukuthi isigxobo esingalungile seseli, siyabola. I-electrolyte evame kakhulu emotweni umswakama we-saline, ongangena kuwo wonke ama-nooks nama-crannies wemoto.
Ukukhishwa kukagesi okungadingekile ngendlela ye-arc kagesi kwenzeka lapho oxhumana nabo bezinhlobo ezihlukahlukene bevaliwe futhi bevulwa, kanye nangesikhathi sokunyakaza okuhlangene kokuxhuma okuxekethile kwezixhumi namatheminali. Lokhu kuqhunyiswa kwenhlansi eyingozi kubangela i-oxidation kancane kancane yezindawo ezithintana naye kanye nokwenzeka kokudluliswa kwezinto ezibonakalayo kusukela engxenyeni exhunywe esigxotsheni esihle kuya engxenyeni eseduze nesigxobo esinegethivu. Ngenxa yalokho, kwakhiwa imigodi nama-protrusions okunciphisa ukuthintana kwangempela kagesi ebusweni ekuxhumekeni. Ngenxa yalokho, ukumelana kwe-junction kuyanda futhi i-voltage yokuhlinzeka iyehla. Le nqubo iyaqhubeka kuze kube yilapho izindawo zokuthintana zishiswa ngokuphelele, ziphula isifunda sikagesi. Kukhona futhi ingozi "yokushisela" othintana nabo, okusho ukuthi isifunda asikwazi ukunqanyulwa.
Umonakalo ochazwe ekuxhumekeni kukagesi ungavinjelwa kakhulu ngokunakekelwa nokugcinwa njalo. Amalunga angenwa kalula ngumswakama ngakho-ke ukugqwala kwe-galvanic kufanele ngezikhathi ezithile kufafazwe ngezinto ezisusa umswakama. Ungqimba lwe-oxide ezindaweni eziqhutshwayo lungasuswa nge-sandpaper. Othintana nabo abahlanzwa ngale ndlela kufanele bavikelwe ngesifutho sokuxhumana, isibonelo. Uma kungenzeka ukwenza buthaka izindawo eziqhutshwayo, kuyadingeka ukulawula futhi ulungise amandla okucindezela kwabo okulinganayo, isibonelo, ngokuqinisa ukuxhumana okufakwe intambo nge-torque efanele.
