Izintambo ezijwayelekile zokusika zikhubazekile ngenxa yokuthamba kwayo lapho isebenza, futhi ubude bayo obuhlangothini buyathambile, obuthinta ukunemba nesivinini senqubo yokusika.Intambo ye-iron-chromium-aluminium iqinile, kodwa i-brittle futhi kulula ukuphuka.Ucingo lokusika lwangempela lwaseJalimane ngeke luthambe, ngeke lukhubazeke ekushiseni okuphezulu, futhi luhlala isikhathi eside.Iwucingo olungcono kakhulu lokusika olushisayo.
Ucingo lokusika olungeniswe luvela eJalimane lunokumelana okuhle kwe-oxidation yangaphezulu namandla okushisa aphezulu.Amandla amakhulu okuqina ocingo olujwayelekile lokusika lwasekhaya angama-780, futhi ucingo lokusika olungenisiwe lungafinyelela ku-1800, olunokusebenza okuhle kokucubungula.Umphumela omuhle kakhulu wokusika ungafinyelelwa ngokulungisa izinga lokushisa kanye nesivinini sokusika, futhi uhlobo nobuningi bezinto ezibonakalayo kuzothinta isivinini sokusika.