1. Nitriding mgbanaka: Ike nke oyi akwa nitrided dị n'elu 950HV, brittleness bụ ọkwa 1, nwere ezigbo abrasion na corrosion resistance, ike ike ọgwụgwụ dị elu, nkwụsị nke corrosion dị elu na ịrụ ọrụ mgbochi; piston mgbanaka nrụrụ obere.
2. Mgbanaka Chrome-plated: Ihe mkpuchi chrome-plated nwere kristal dị mma na nke dị nro, ike siri ike dị n'elu 850HV, ihe mgbochi na-eyi dị mma nke ukwuu, na netwọk crisscross micro-crack na-akwado ịchekwa mmanụ lubricants. Dị ka ozi dị mkpa si dị, "Mgbe chrome plating n'akụkụ nke piston mgbanaka groove, eyi nke mgbanaka groove nwere ike ibelata nke ukwuu. Na engines nwere oke okpomọkụ na ibu, ụzọ ndị a kpọtụrụ aha n'elu nwere ike ibelata nkwụsị nke piston mgbanaka site na 33 ruo 60".
3. Mgbanaka Phosphating: Site na ọgwụgwọ kemịkalụ, a na-emepụta ihe nkiri nke ihe nkiri phosphating n'elu mgbanaka piston, nke nwere ike igbochi ngwaahịa ahụ site na nchara ma melite mbido mbụ nke mgbanaka ahụ.
4. Mgbanaka Oxidation: N'okpuru ọnọdụ okpomọkụ dị elu na ike oxidant, a na-emepụta ihe nkiri oxide n'elu ihe nchara, nke nwere nguzogide corrosion, mgbochi mgbochi na ọdịdị dị mma. E nwekwara PVD na ndị ọzọ.
