1. Kev kho deg ua ntej kev teeb tsa
Tua blasting / xuab zeb: rougher nto → sai & ntau yam xim hloov
Roj, xeb tiv thaiv, zeb nplai tsis tshem tawm: xim dhau los ua patchy, qeeb kom hnov mob
Polished heev du: xeb txheej cov ntaub ntawv unevenly, zoo li streaky
2. Kev ua thiab kev tsim khoom
Txiav, khoov, vuam cov cim: Welded thaj chaw & khoov thaj chaw muaj kev ntxhov siab sab hauv & oxide txheej → tsaus dua, hloov xim sai dua
Nto khawb: Kos thaj chaw xeb ua ntej, tsim lub teeb / tsaus nti
Cov khoom siv tsis sib xws: Cov khoom sib txawv ntawm SPA-H tuaj yeem muaj qhov sib txawv me ntsis → sib txawv me ntsis xim kawg
3. Kev teeb tsa kev teeb tsa
Kev taw qhia rau hnub ci: Sab qab teb-ntsiag / muaj zog UV → tsaus nti & nrawm dua sab → sib dua, qeeb dua
Tiv tauj nrog lwm cov ntaub ntawv: Kov cov cement, pob zeb, ntoo, av → absorbs noo noo → dark spots los yog discoloration
Qhov cua txiasCov cua tsis zoo → lub sij hawm ntev damp → xoob txiv kab ntxwv xeb, nyuaj rau darken tusyees
4. Cov dej nag thiab dej ntws los
Vertical kos npe: yooj yim kom muajxeb streaks
Kab rov tav / recessed cheeb tsam: dej tuav → teeb lub nplhaib stains los yog thaj ua rau thaj tsaus
High-altitude / muaj zog cua: ceev kom qhuav → ntau txawm patina
5. Tib neeg yam thiab tom qab cuam tshuam
Kev sib tsoo, graffiti, ntxuav nrog tshuaj: Kev puas tsuaj rau txheej txheej xeb → xim inconsistency
Sprinkling los ntawm cov irrigation systems nyob ze: Nquag ntub dej → patchy xim
6. Kev pabcuam lub neej thiab kev laus ntawm patina
Thaum ntxov: ci liab → tsis ruaj khov
Nruab nrab-term: tsaus xim av → maj mam ruaj khov
Ntev -lub sij hawm: me ntsis tob los yog me ntsis fading nyob ntawm UV & kua qaub los nag
Yog tias tsis muaj kev tiv thaiv, qhov saum npoo yuav dhau los ua hmoov thiab zoo li sib dua thaum lub sijhawm
7. Cov pa phem thiab plua plav txuas
Plua plav, oily fumes, hlau hais txuas rau saum npoo
Cov ntaub ntawv hauv zos corrosion → xim me ntsis, unevenness
