1. Indandatho ye-nitriding: Ubunzima bomgca we-nitrided bungaphezulu kwe-950HV, i-brittleness yibakala le-1, i-abrasion efanelekileyo kunye nokumelana nokubola, amandla aphezulu okudinwa, ukuxhathisa okuphezulu kwe-corrosion kunye nokusebenza okuchasayo; piston ring deformation encinci.
2. I-Chrome-plated ring: I-chrome-plated layer ineekristale ezintle kwaye ezigudileyo, ukuqina kungaphezulu kwe-850HV, ukuxhathisa ukunxiba kuhle kakhulu, kunye ne-crisscross micro-crack network inceda ukugcina izinto zokuthambisa. Ngokolwazi olufanelekileyo, "Emva kokufakwa kwe-chrome kwicala le-piston ring groove, ukunxiba kwe-ring groove kunokuncitshiswa kakhulu. Kwii-injini ezinobushushu obuphakathi kunye nomthwalo, ezi ndlela zikhankanywe ngasentla zinokunciphisa ukunxiba kwe-piston ring groove ngama-33 ukuya kuma-60”.
3. I-Phosphating ring: Ngonyango lweekhemikhali, uluhlu lwefilimu ye-phosphating iveliswa phezu kwendandatho yepiston, enokuthintela imveliso ukuba ingagqwala kwaye iphucule ukuqala kokungena kwindandatho.
4. Indandatho ye-oxidation: Ngaphantsi kwemeko yokushisa okuphezulu kunye ne-oxidant eqinile, ifilimu ye-oxide yenziwe phezu kwendawo yensimbi, enokumelana nokugqwala, i-lubrication anti-friction kunye nokubonakala kakuhle. Kukwakho nePVD njalo njalo.
