Answer
Ibyuma bya karubone (SAE 1070-1090) amasoko yumuraba ashobora kwanduzwa na hydrogène mugihe cyo gusukura aside no gukwirakwiza amashanyarazi (urugero, zinc cyangwa kadmium). Hydrogen hydrogène $ (\ inyandiko {H} ^ +) $ ikwirakwira mu mbibi z’ingano z’ibyuma bikomeye, bigatera kuvunika gucika intege kuri stress munsi yumusaruro. Kugira ngo ibi bigabanuke, inzira yo gukora igomba kuba irimo 'guteka'. Nk’uko ASTM B633 ibivuga, ibice bigomba gutekwa $ 375 ^ {\ umuzenguruko} F \ pm 25 ^ {\ umuzenguruko} F $ ($ 191 ^ {\ umuzenguruko} C $) byibuze amasaha 4 kugeza kuri 24, bitewe n’ubukomere (HRC), vuba bishoboka nyuma yo kubumba (nibyiza mu masaha 4). Kubintu bikomeye byumutekano wibinyabiziga, injeniyeri benshi bagaragaza plaque ya mashini cyangwa pasitifike idafite ibyuma kugirango bakureho burundu.
