Ibyuma bitagira umwanda ni ijambo rusange kumuryango wibyuma byangirika byangirika birimo 10.5% cyangwa chromium.
Ibyuma byose bidafite ingese bifite imbaraga nyinshi zo kurwanya ruswa. Uku kurwanya ibitero biterwa na firime isanzwe ikungahaye kuri chromium ikungahaye hejuru yicyuma. Nubwo ari ntoya cyane, iyi firime itagaragara, inert ifatana cyane nicyuma kandi irinda cyane mubitangazamakuru byinshi byangirika. Firime iriyubaka cyane byihuse imbere ya ogisijeni, kandi ibyangijwe no gukuramo, gukata cyangwa gutunganya birasanwa vuba.
Igihe cyo kohereza: Nyakanga-15-2020