Inta lagu jiro maaraynta, ururinta, alxanka, kormeerka tolitaanka alxanka, iyo habaynta taarikada gudaha, qalabka, iyo agabka taangiyada birta ah, wasakhaha dusha kala duwan sida wasakhowga saliidda, xagashada, miridhku, wasakhda, wasakhowga birta-dhibcaha hoose , rinji, alxanka alxanka, iyo splatter ayaa la soo bandhigay.Maaddooyinkani waxay saameeyaan tayada dusha sare ee birta aan la taaban karin, waxay dhaawacaan filimkeeda passivation, waxay yareeyaan caabbinta daxalka, waxayna ka dhigaan mid u nugul warbaahinta daxalka ah ee alaabada kiimikaad ee la raro mar dambe, taasoo horseedaysa godad, daxalka intergranular, iyo xitaa diiqada dillaaca daxalka.
Taangiyada birta ah, sababtoo ah qaadista kiimikooyinka kala duwan, waxay leeyihiin shuruudo sare oo looga hortagayo wasakhowga xamuulka.Maaddaama tayada dusha sare ee taarikada birta ah ee waddanku soo saarto ay aad u liidato, waa wax caadi ah in la sameeyo makaanik, kiimiko, amapolishing electrolyticon taarikada birta ah, qalabka, iyo qalabka ka hor nadiifinta, picking, iyo passivating si kor loogu qaado iska caabinta daxalka ee birta ahama.
Filimka passivation ee birta aan lahayni waxa uu leeyahay sifooyin firfircoon mana aha in loo tixgeliyo in uu si buuxda u joojinayo daxalka balse waa samaynta lakab difaac oo faafiya.Waxay u egtahay in ay dhaawacdo marka ay joogaan walxaha yareeya (sida ions chloride) waxayna ilaalin kartaa oo hagaajin kartaa joogitaanka oksaydhiyeyaasha (sida hawada).
Marka birta aan-dhalatada lahayn ay hawada gasho, filim oksaydh ah ayaa samaysma.
Si kastaba ha ahaatee, sifooyinka ilaalinta filimkan kuma filna.Iyada oo la soo ururinayo aashitada, celceliska dhumucda 10μm ee ahdusha sare ee birta ahwaa daxaloobay, iyo dhaqdhaqaaqa kiimikaad ee aashitada ayaa ka dhigaysa heerka kala dirida meelaha cilladaysan oo ka sarreeya meelaha kale ee dusha sare.Sidaa darteed, pickling wuxuu ka dhigayaa dhammaan dusha sare inay u muuqdaan kuwo isku dheelitiran.Muhiimad ahaan, iyada oo la soo qaado iyo bakhti, birta iyo oksaydhisku waxay ku milmaan si doorbidan marka la barbar dhigo chromium iyo oksaydhyadeeda, iyaga oo ka saaraya lakabka chromium-dhamay oo korka ku hodminaya chromium.Under tallaabada passivating ee oksidants, filim passivation dhamaystiran oo xasiloon ayaa la sameeyay, iyada oo suurtogalnimada filimkan chromium-hodan ku ah filimka passivation gaarey +1.0V (SCE), oo u dhow awoodda biraha sharafta leh, kor u qaadida xasilloonida iska caabbinta daxalka.
Waqtiga boostada: Nov-28-2023