1. Cov txheej txheem hloov xim tom qab xeb
Thawj theem xeb (1-3 lub hlis): Fresh Q355NH muaj xim hlau grey tiav. Thaum raug huab cua thiab noo noo, nws xub tsim lub teeb txiv kab ntxwv -xim av los yog reddish-xim av xoob xeb. Nyob rau theem no, cov xim yog qhov ci thiab tsis sib xws.
Patina tsim theem (3-12 lub hlis): The loose rust gradually reacts with alloying elements (Cr, Cu, P) in Q355NH to form a dense, stable dark reddish-brown or dark brown patina. Qhov no yog thaum cov xim 明显 darkens-hloov los ntawm ci xeb mus rau ib tug sib sib zog nqus, uniform tsaus suab.
Stable theem (tom qab 12 lub hlis): Lub patina puv puv rau hauv xim av tsaus lossis ze rau - txheej tiv thaiv dub. Nws nres ntxiv cov xim tseem ceeb ntxiv thiab tswj qhov tsaus ntuj, zoo ib yam ntev -lub sij hawm.
2. Qhov laj thawj tseem ceeb rau kev tsaus ntuj
Q355NH yog huab cua hlau. Nws cov core corrosion kuj yog nyob ntawm kev tsim cov patina ntom ntom (suav nrog hlau oxides, chromium oxides, thiab tooj liab phosphates).
Compared to loose, bright red rust (mainly Fe₂O₃·nH₂O), the mature patina has a higher density and richer alloy composition, which absorbs more light and reflects less-resulting in a darker visual effect.
3. Kev ceev faj rau kev siv
Qhov tsaus nti yog ib qho cim ntawm kev tsim patina, tsis yog qhov tsis zoo. Nws qhia tau hais tias cov hlau tab tom txhim kho corrosion kuj.
Rau kev siv sab nraum zoov (xws li architectural facades, txuas hniav), tsis txhob tu ntau zaus ntawm patina- qhov no yuav cuam tshuam nws txoj kev tsim thiab ncua kev tsaus ntuj / ruaj khov.
Nyob rau hauv ib puag ncig hnyav (ntev ntsev tsuag tsuag, muaj pa taws), patina tuaj yeem tsim tsis sib xws, ua rau pom qhov tsaus ntuj. Ua ntej- kho qhov chaw nrog lub ntsuas cua accelerator lossis siv lub tsho tiv thaiv kom pom tseeb yog tias xav tau kev tsaus ntuj.
