Insimbi engagqwali yitemu elijwayelekile lomndeni wezinsimbi zengxubevange ezingagqwali eziqukethe u-10.5% noma ngaphezulu kwe-chromium.
Zonke izinsimbi ezingenasici zinokumelana okuphezulu nokugqwala. Lokhu kumelana nokuhlaselwa kungenxa yefilimu ye-oxide ecebile nge-chromium eyakhiwe phezu kwensimbi. Nakuba izace ngokwedlulele, le filimu engabonakali, engenzi lutho inamathela ngokuqinile ensimbi futhi ivikela ngokwedlulele ezinhlobonhlobo zemithombo yezindaba ezonakalisayo. Ifilimu iyazilungisa ngokushesha lapho kukhona umoya-mpilo, futhi ukulimala ngokuhuzuka, ukusika noma ukwenziwa ngomshini kulungiswa ngokushesha.
Isikhathi sokuthumela: Jul-15-2020