1. Vim li cas Mature Patina Tiv Thaiv Kev Tiv Thaiv Thib Ob
Nthuav, tsis yog - ntxeem tau qauv: Ib txheej patina paub tab muaj lub compact, txheej microstructure nrog tsis tshua muaj porosity. Cov qauv no ua raws li alub cev thaiv, thaiv kev nkag mus ntawm corrosive media (piv txwv li, dej, oxygen, ntsev tsuag) rau hauv cov hlau substrate thiab txiav tawm cov tshuaj tiv thaiv electrochemical corrosion.
Muaj zog adhesion rau lub substrate: Tsis zoo li cov xoob, yooj yim tev xeb ntawm cov pa roj carbon zoo tib yam, huab cua steel lub patina yog ruaj khov rau cov hlau nto. Txawm hais tias qhov chaw yog khawb me ntsis, cov ntsiab lus alloy hauv patina yuav tsiv mus rau qhov chaw khawb thiab tsim cov yeeb yaj kiab tiv thaiv tshiab, ua tiav.tus kheej - khothiab tiv thaiv localized secondary corrosion.
2. Cov kev txwv: Thaum Patina tsis tuaj yeem tiv thaiv kev xeb ntxiv
Tsis paub qab hau patina: Thawj txheej xeb (tsim nyob rau hauv 1-3 lub hlis ntawm kev tawm sab nraum zoov) yog xoob thiab ntxeem tau, tsis muaj peev xwm tiv thaiv. Nws yuav ua kom corrosion yog tias tsis tso cai rau kom paub tab lossis raug kho nrog kev nrawm nrawm.
Extreme corrosive ib puag ncig: Patina tsis tuaj yeem tiv taus ntev -lub sij hawm immersion nyob rau hauv seawater, concentrated acid/alkali solutions, los yog siab -sulfur industrial puag ncig. Hauv cov xwm txheej no, cov txheej txheem patina yuav raug puas tsuaj, thiab lwm yam corrosion yuav tshwm sim ntawm lub substrate.
Kev puas tsuaj: Kev khawb hnyav, kev sib tsoo, lossis vuam spatter uas nkag mus rau hauv patina thiab nthuav tawm cov hlau tsis muaj steel substrate yuav ua rau thaj chaw pitting corrosion. Tus kheej-kev kho ceev ntawm patina yog qeeb hauv qhov chaw qhuav, thiab qhov corrosion thib ob yuav kis tau ua ntej cov ntaub ntawv zaj duab xis tshiab.
3. Kev ntsuas los txhim kho Patina's Anti-Secondary Corrosion Ability
Txhawb nqa patina maturation: Rau weathering steel siv nyob rau hauv ib puag ncig sab nraum zoov, siv dag patina accelerators kom luv lub sij hawm maturation ntawm 1-2 xyoo (natural weathering) mus rau 2-3 lub lis piam. Qhov no sai sai ua ib qho kev tiv thaiv patina thiab zam kev ntxov ntxov -stage corrosion.
Thov xa ntawv -patina sealing: Rau kev siv ntug hiav txwv lossis kev lag luam, lub tsho loj patina nrog apob tshab breathable fluorocarbon sealant. Lub sealant txhim kho lub patina qhov cuam tshuam tsis cuam tshuam rau nws qhov zoo nkauj, thiab nws tuaj yeem rov siv dua txhua 2-3 xyoos rau kev tiv thaiv ntev ntev.
Kho patina puas: Rau qhov chaw khawb, ntxuav qhov chaw nrog cov hlau tsis muaj steel hlau txhuam, siv me me ntawm patina accelerator, thiab tswj cov av noo siab rau 2-3 hnub los tsim cov yeeb yaj kiab tiv thaiv tshiab ntawm qhov chaw puas.
