Many bridges are located close to water surfaces, including river-crossing and sea-crossing bridges, where high tides may submerge parts of the bridge deck.
Cov pa roj carbon hlau tuaj yeem corrode tsis pub dhau 1-2 xyoo nyob rau hauv cov xwm txheej zoo li no.ASTM A588 Qib C Huab Cua Hlau muaj kev ua kom haum corrosion tsis kam, durability, thiab kev pom kev pom.
Corrosion Kuj & Cov Ntaub Ntawv Zoo
| Chaw ua uas tsis tau haus | Cov Khoom Siv Carbon Txawv Hlau | A588 Qib C Huab Cua Hlau |
|---|---|---|
| Cov Khoom Siv Txhua Xyoo Tsis Txaus | 0.1-0.2 hli | <0.02 mm |
| Kev pabcuam lub neej nyob sab nraum zoov / Choj | 10-15 XYOO | 30-50 XYOO |
| Kev Saib Xyuas Ntau | Txhua txhua 3-5 xyoos | Tsawg kawg (cov xim tuab tsis xav tau) |
| Txij Nkawm Kev Txuag Nyiaj | – | Mus txog 40% txo |
| Kuj mus rau submersion / tidal nyhuv | Pluag | Zoo tshaj |
Kev ua kom zoo nkauj - xeb patina
| Yam zoo | Cov ntsiab lus |
|---|---|
| SOOST LOS STARILIZE | 1-3 xyoos |
| Patina xim | Uniform reddish -} xim av |
| Patina txheej thickness | 0.1-0.3 hli |
| Pom cov txiaj ntsig | Textured, hnyav, visually striking |
| Cov Ntawv Thov Kev Ua Lag Luam | Txuas hniav, Nroog Landmarks, Facades |
Cov ntsiab lus rau Choj Haujlwm
Txo kev txij nkawm: ua tsaug rau tus kheej -}} tiv thaiv siav patina, qib Ceg Bishently lowers qhov kev xav tau ntawm kev pleev xim lossis kho vaj tse. Cov nqi txij nkawm yuav raug txo los ntawm 30-40% piv rau cov pa roj carbon hlau, thiab realing nrug txuas ntxiv los ntawm txhua 3-5 xyoos rau txhua 15-20 xyoo.
Txhim kho durability: A588 qib C steel muaj zoo heev rau dej hiav txwv, dej noo noo ib puag ncig muaj tsawg dua 0.02 hli. Qhov no ua kom ntseeg tau tias cov neeg tiv thaiv choj tuaj yeem tswj hwm cov qauv txheej txheem rau 30-50 xyoo tsis muaj kev saib xyuas loj.
Txhim kho kev ua kom zoo nkauj ua kom zoo nkauj: tus hlau tsim cov tawv ruaj ruaj uas ua raws li ob qho tib si tiv thaiv thiab hniav. Lub patina txheej feem ntau yog ruaj khov nyob rau hauv 1-3 xyoos, sib sau ua 0.1-0.3} xim av liab, zoo nkauj} xim av, visually striking nyhuv rau choj thiab lwm yam qauv.
