Igwe anaghị agba nchara enweghị nkebi anwụrụ bụ eguzogide ikuku, uzuoku, mmiri na ndị ọzọ na-adịghị ike corrosive ọkara na acid, alkali, nnu na ndị ọzọ chemical etching ọkara corrosion nke ígwè anwụrụ, na thicker mgbidi, ọ bụ ihe echekwa na bara uru, na thinner mgbidi ọkpụrụkpụ. , ọnụ ahịa nhazi ya ga-ebili nke ukwuu.Na ekwe, torsional ike bụ otu, ìhè arọ, otú ọ na-ọtụtụ ebe na-eji na imewe nke n'ibu akụkụ na engineering owuwu.