Answer
Lalacewar jujjuyawar yana faruwa a wuraren tuntuɓar (crests da troughs) na magudanar ruwa lokacin da akwai minti, babban motsi na dangi tsakanin bazara da saman mating. Wannan motsi yana rushe shingen oxide mai kariya akan karfe, yana haifar da saurin iskar oxygen da samuwar 'tarkace mai ban tsoro' (yawanci foda mai kyau ko ja ko baki). A lokacin tsagewar, wannan yana bayyana azaman ramin da aka keɓance ko kuma 'shaƙewa' a kololuwar igiyar ruwa. Fretting shine mafari ga gazawar gajiya, kamar yadda ramukan ke aiki azaman abubuwan damuwa. Don rage wannan, injiniyoyi na iya ƙididdige busasshen man shafawa na fim (kamar $MoS_2$) ko shafi na PTFE, wanda ke rage ƙimar juzu'i kuma yana hana hulɗar ƙarfe-zuwa-karfe wanda ke tafiyar da aikin fretting.
