Cov xim (shade, uniformity, brightness, darkening ceev) ntawm lub ntuj patina yog txiav txim los ntawm ib tug ua ke ntawmkhoom, nto, ib puag ncig thiab kev tsim khoom yam.
1. Cov xwm txheej ib puag ncig
Atmospheric ib puag ncig
Kev lag luam huab cua (SO₂, plua plav) → darker, tob xim av
Cov huab cua nyob deb nroog / huv → sib dua, txiv kab ntxwv -xim av
Ntug hiav txwv / ntsev tsuag → paler, patchy, tsis ruaj khov
Humidity & ntub-dry cyclesLub voj voog ntub-qhuav → tsis sib xws, nrawm nrawm nrawm → ntub dej → xoob, lub teeb, tsis sib xws rustDry huab cua → xim qeeb heev
Hnub ci & kubLub hnub ci muaj zog → tsaus thiab ntau dua qhov ntxoov ntxoo → sib dua thiab qeeb dua
Los nag, dej & qhov cuaVertical, zoo-drained nto → xim tsis sib xws sawv dej los yog qhov cua tsis zoo → streaks thiab unevenness
2. Qhov xwm txheej ntawm qhov chaw
Nto roughnessRougher nto (sandblasted) → sai darkening, ntxaum ximSmoother nto (hauv av/polished) → qeeb, sib zog xim
Kev huv ntawm qhov chawRoj, plua plav, zeb nplai → xim tsis sib xwsClean nto (pickled/blast-cleaned) → uniform patina
3. Tshuaj & khoom siv kho mob yam
Tshuaj patina acceleratorsTxhim kho xim thiab txhim kho uniformity
Transparent sealers / txheejUa kom qeeb lossis nres ntxiv kev hloov xim
Tswj lub voj voog ntub-qhuavZoo heev cuam tshuam xim qhov tob thiab tsim ceev
4. Khoom siv nws tus kheej
SPA-H alloy muaj pes tsawg leeg (Cu, Cr, Ni, P) ncaj qha txiav txim siab qhov ruaj khov thiab lub suab xim av kawg ntawm patina.
