Official Answer
Answer
A cikin famfo mai jujjuyawar, magudanar ruwan raƙuman ruwa tana jurewa ƙarami-deflections akai-akai. Wannan yana haifar da 'damuwa' a wuraren tuntuɓar juna (kololuwar) inda bazara ta shafa akan faranti. Fretting yana cire kariyar oxide Layer na 17-7PH, yana haifar da rami da aka keɓe. Waɗannan ramukan suna aiki azaman matsananciyar damuwa ($ K_t$). Rashin gazawar yana bayyana azaman fashewa da ke yaduwa daga kololuwa ta bangon radial. Don hana hakan, yakamata a taurare wuraren tuntuɓar zuwa aƙalla HRC 50, ko kuma a yi amfani da man shafawa mai bushe-bushe (misali, MoS2) a cikin bazara don rage ƙimar juzu'i da ƙimar lalacewa.
