Lub corrosion tsis kam ntawmS355j2wp(weathering / 耐候钢 nyob rau hauv en 10025-5) yogtseem ceeb tshajrau dog digS355Cov hlau txheej txheem (piv txwv li, s355jr hauv en 10025-2). Ntawm no yog cov ncauj lus piav qhia:
1. Corrosion Reaction Kev Txhim Kho
| Ntiag tug | S355 (Hlau Hlau) | S355J2WP (Weathering Hlau) | Yam ua kom zoo dua |
|---|---|---|---|
| Atmospheric corrosion | Siab (cov ntaub ntawv xoob) | 2-8 × qeeb qeeb (cov ntawv tiv thaiv patina) | 2-8 zaugNcua sijhawm ntev dua hauv kev qhib huab cua |
| Rust txheej | Flaky, ntxeem ntxig xeb accelse | Ntom, adherent patina thaiv cov oxidation ntxiv | Yus tus kheej tiv thaiv |
| Kev Siv Cov Ntaub Ntawv | Sab hauv tsev qauv, pleev xim rau thaj chaw | Txuas hniav, Facades, tsis tau them sab nraum zoov sab nraum zoov | Tshem tawm yuav tsum tau pleev xim |
Cov ntaub ntawv tseem ceeb:
S355j2wpCov khoom ua haujlwm ntawm tus nqi corrosion ntawm0.002-0.005 mm / xyooNyob rau hauv cov neeg nyob hauv nroog / Nroog Umospheres, vs.0.010-0.040 mm / xyoorau S355.
Hauv kev muaj / ntug dej hiav txwv ib puag ncig, S355j2WP kav4-6 × ntevua ntej tseem ceeb thinning tshwm sim.
2. Vim li cas qhov sib txawv?
S355j2wpMuajAlloying Ntsiab(Cu, p, cr) uas hnoos xyuas ib txheej xeb ruaj khov:
Tooj Liab (Cu): 0.25-0.55% - Thawj tus tsav npav rau cov Patina tsim.
Phosphorus (p): Tsawg dua lossis sib npaug rau 0.030% - Txhim kho cov xeb kiav laj.
Chromium (cr): 0.30-1.25% - boosts tsis kam rau pitting.
Zoo li ib txwmS355tsis muaj cov tshuaj ntxiv no, ua rau muaj kev vam meej xeb.
3. Cov tswv yim cuam tshuam
Nqi txuag: S35555555555555555555555555pp tshem tawm cov xim / kev saib xyuas cov nqi 20+ xyoo.
Tsim Lub Neej: Txuas ntxiv kev pabcuam lub neej los ntawm2–4×nyob rau hauv ib puag ncig ib puag ncig (piv txwv li, txuas hniav).
Kev txwv: Tsis haum rau qhov kev ua yeeb nkab dej (siv cov hlau siv).
