Mubisanzwe, ubuso hamwe nimpera yanyuma yimpeta yambere iba ifite chrome, kandi izindi mpeta za piston nazo zirashobora kuba zometse kuri chrome. Impeta nini ya marine ya mazutu piston ntabwo isizwe na chrome, naho silinderi ifite chrome. Kugeza ubu, hateguwe impeta ya chrome-ceramic compating coating piston impeta, kandi ikizamini cyerekana ko amafaranga yo kwambara atarenze kimwe cya kabiri cyimpeta ya chrome yometse kuri chrome, kandi imyenda yo kwambara ya silinderi ihuye nayo iragabanuka.

Molybdenum yatewe igiti ifite uburyo bwiza bwo kwihanganira kwambara, gukoporora hamwe na silinderi ya tensile irwanya chrome. Chrome-isize ibyuma bya silinderi hamwe na molybdenum yatewe piston impeta irashobora gukora neza.

Ibice bikoreshwa cyane kumpeta ya piston ni oxyde ya aluminium, okiside ya titanium na chromium oxyde, cyane cyane ya aluminium titanate.

Uburyo bwo guteramo ion bukomatanya ibintu byatoranijwe bya chimique mubice muri silinderi hamwe na piston impeta. Iion yatewe inshinge ihujwe nubuso bwa silinderi liner na piston impeta, kandi ntigira ingaruka nke kubuso bwubuso no muburyo bwuzuye. Hano hari plasma isahani ya TiN ikwirakwizwa, hejuru ya ion isa na CrN firime ikomeye, isi idasanzwe ion carburizing nibindi. Ubushakashatsi bwerekana ko kuzimya no kugabanya impeta ya piston hanyuma ugahindura nitrid hejuru yubutaka budasanzwe ion birashobora kunoza cyane imyambarire yimpeta ya piston kandi bikongerera igihe kinini umurimo wacyo.

Kuvura amavuta yo kwisiga ni ugukora chimique firime yibyuma hejuru yicyuma, ibyuma nifu yifu ya metallurgie kugirango bigire uruhare rwo kwisiga. Hariho cyane cyane amavuta yo gutunganya firime ya fosifatiya hamwe na firime ya alkaline oxyde yo kuvura, ikoreshwa mugutwika impeta za piston hamwe na silinderi ya moteri ntoya yo gutwika imbere. Byongeye kandi, nitride yamazi na nitride yoroshye birashobora kandi kunoza imyambarire ya silinderi yicyuma.

Kwambara kwimyambarire yubukwe bigira ingaruka kubintu bitandukanye, bityo ubuso bugenda buvurwa hamwe no kwihanganira kwambara. Kurugero: igisubizo cyumuriro na sulfurize, kuzimya carburizing kuzimya na sulfurize, nitride yoroshye na sulfurize, nitroxide hamwe no guhuza plaque ya chrome hamwe na spray ya molybdenum.