Answer
Lalacewar rami wani nau'i ne na lalata wanda ke haifar da ƙananan ramuka ko 'rami' a saman kayan. A cikin 17-7PH bakin karfe, waɗannan ramukan suna faruwa lokacin da fim ɗin wucewa ya rushe a gaban ions chloride. Kodayake asarar yawan jama'a ba ta da kyau, ramukan suna aiki azaman matsananciyar damuwa. Matsakaicin ƙarfin damuwa a rami mai zurfi $a$ ana iya kimanta shi kamar $K_I = 1.12 \cdot \ sigma \cdot \sqrt{\pi \cdot a}$. Da zarar $K_I$ ya kai ƙarfin karyewar $K_{Ic}$ na kayan, fashewa yana yaduwa da sauri. Tun da maɓuɓɓugan ruwan raƙuman ruwa suna ƙarƙashin matsin lamba na dindindin ko zagaye, pitting sau da yawa yana canzawa kai tsaye zuwa lalata lalatawar damuwa (SCC) ko gajiya mai lalata, wanda ke haifar da gazawar kwatsam, bala'i ba tare da faɗakarwa ba.
