Taw qhia
Corrosion yog ib qho teeb meem kim tshaj plaws thiab txaus ntshai hauv cov kav dej. Txawm hais tias nws yog atmospheric corrosion, av corrosion, los yog tshuaj lom neeg corrosion, cov khoom xaiv ntawm cov hlau dub thiab carbon hlau ua rau muaj kev cuam tshuam rau cov kav dej thiab cov nqi tu.
Kab lus no muab kev sib piv sib sib zog nqus ntawm cov kav hlau dub thiab cov kav hlau carbon steel teb li cas rau qhov chaw muaj corrosive-xws li kev lag luam huab cua, dej hiav txwv, siab - thaj chaw av noo, thiab cov ntawv thov hauv av.
Vim li cas Corrosion tshwm sim hauv cov yeeb nkab steel?
Corrosion tshwm sim thaum hlau reacts nrog oxygen thiab noo noo, tsim xeb (hlau oxide). Yam muaj xws li:
- Cov av noo
- Av acidity
- Salinity
- Kub variation
- Tshuaj raug
- Dej zoo
Cov kav hlau dub tsis muaj kev tiv thaiv zoo tshaj - cov yam ntxwv corrosion, thaum cov pa roj carbon steel kav tuaj yeem coated, alloyed, lossis kho kom zoo dua.
Corrosion Performance Table
| Ib puag ncig | Dub Hlau Yeeb | Carbon Steel Yeeb Nkab | Sau ntawv |
|---|---|---|---|
| Hauv Tsev Qhuav | Zoo | Zoo heev | Tsawg heev corrosion |
| Humid / Damp | Ncaj ncees | Zoo-zoo nrog txheej | Cov hlau dub yuav tsum tau pleev xim |
| Hauv av | pluag | Zoo nrog FBE / 3PE / bitumen | Cov hlau dub corrodes sai sai |
| Marine / ntug hiav txwv dej | Neeg pluag heev | Zoo nrog zinc txheej | Cov pa roj carbon steel ua haujlwm zoo dua |
| Cov nroj tsuag tshuaj | pluag | Zoo heev (alloyed los yog coated) | Carbon steel nyiam |
Vim li cas Dub Hlau Corrodes sai dua
- Hlau oxide txheej tsis sib xws thiab ntxeem tau
- Tsis muaj alloying ntsiab (Cr, Ni, Mo)
- Tsawg- nqi tsim khoom → kev tiv thaiv tsawg dua
- Tsis yog npaj rau hnyav industrial raug
Yuav Ua Li Cas Carbon Steel Mitigates Corrosion
Carbon steel tuaj yeem txhim kho nrog:
- Galvanizing
- Epoxy / FBE txheej
- PE/PP multi{0}} txheej txheej
- Cathodic tiv thaiv
- Alloying (Cr{0}}Mo steel)
Cov kev kho mob no ua rau kom ntev ntev ntawm cov kav dej thiab txo cov nqi kho.
Case Study: Underground Water Pipeline
Kev tshawb fawb qhia:
- Uncoated dub hlau kav yuav ua tsis tau nyob rau hauv2-5 xyooshauv av
- Coated carbon steel pipelines tuaj yeem ua haujlwm30-50 xyoonrog kev kho me me
Qhov no qhia txog kev ntseeg siab zoo tshaj ntawm cov hlau hauv siab -corrosion ib puag ncig.
Xaiv cov kav dej raws li Corrosion Risk
Siv cov yeeb nkab dub rau:
- Sab hauv tsev roj kab
- Cov chav tshuab ziab khaub ncaws
- Cov tshuab hluav taws xob tua hluav taws (tsis yog- dej corrosive)
Siv Carbon Steel Pipe rau:
- Cov kav dej faus
- Cov ntug hiav txwv dej
- Cov nroj tsuag muaj
- Petrochemical thiab offshore
- High -cov av noo ib puag ncig
- Cov dej kub lossis tshuaj lom neeg thauj khoom
Xaus
Cov yeeb nkab dub yog tsim nyog rau qhov tsawg-kev pheej hmoo nyob hauv tsev, tab sis cov pa roj carbon steel yeeb nkab-tshwj xeeb tshaj yog coated los yog alloyed versions- muab kev tiv thaiv zoo tshaj plaws rau kev lag luam, dej hiav txwv, thiab hauv av. Rau kev ua haujlwm ntev - lub sijhawm ua haujlwm thiab kev nyab xeeb, carbon steel yog qhov kev ntseeg siab dua thiab tus nqi - xaiv tau zoo.
Nyeem Ntawv Ntxiv
Dub Hlau vs Carbon Steel Yeeb Nkab: Ib qho kev sib piv kev sib piv
Mechanical Strength Thiab Pressure Rating: Dub Hlau Yeeb Vs Carbon Steel Pipe
Nkag siab txog Dub Hlau Yeeb Nkab Txheej: Hom, Kev Ua Haujlwm, Thiab Kev Siv Khoom Siv
