1. Nitriding zobe: Taurin nitrided Layer yana sama da 950HV, brittleness shine aji 1, yana da kyau abrasion da lalata juriya, ƙarfin gajiya mafi girma, juriya na lalata da kuma aikin anti-seizure; nakasar zoben fistan ƙananan.
2. Chrome-plated zobe: Chrome-plated Layer yana da kyau da kuma santsi lu'ulu'u, da taurin ne sama da 850HV, da lalacewa juriya ne da kyau sosai, da crisscross micro-crack cibiyar sadarwa ne dace don adana lubricants. Dangane da bayanan da suka dace, "Bayan chrome plating a gefen ramin zobe na piston, za a iya rage lalacewa ta hanyar zobe. A kan injuna masu matsakaicin zafin jiki da nauyi, hanyoyin da aka ambata a sama za su iya rage lalacewa na zoben piston da 33 zuwa 60”.
3. Zoben phosphating: Ta hanyar maganin sinadarai, ana samar da fim ɗin phosphating a saman zoben piston, wanda zai iya hana samfurin daga tsatsa da kuma inganta farkon gudu na zobe.
4. Zoben Oxidation: A ƙarƙashin yanayin yanayin zafi mai zafi da mai ƙarfi mai ƙarfi, an samar da fim ɗin oxide akan saman kayan ƙarfe, wanda ke da juriya na lalata, lubrication anti-kumburi da kyakkyawan bayyanar. Akwai kuma PVD da sauransu.
