Hauv kev lag luam petrochemical, kev xeb ntawm cov kav dej ua rau muaj kev hem thawj loj rau kev ua haujlwm kev nyab xeeb, kev tiv thaiv ib puag ncig, thiab kev lag luam zoo. Cov kav xa dej feem ntau thauj cov khoom corrosive xws li roj av, roj av, sulfur compounds, acids, thiab alkalis, ua rau cov kav dej tiv thaiv corrosion yog qhov tseem ceeb tshaj plaws hauv engineering. Kab lus no tshawb txog cov tswv yim zoo tshaj plaws rau kev tiv thaiv corrosion hauv cov kav dej petrochemical, npog cov khoom siv, kev tiv thaiv saum npoo, tiv thaiv cathodic, thiab kev saib xyuas corrosion.
Xaiv cov khoom siv: Thawj Kab Kev Tiv Thaiv
Xaiv cov khoom siv corrosion-resistant ho txuas ntxiv lub neej kev pab cuam ntawm cov kav dej. Cov kev xaiv uas muaj xws li:
| Khoom siv | Hom | Cov yam ntxwv tseem ceeb | Kev thov ib puag ncig |
|---|---|---|---|
| 316l ua | Austenitic Stainless hlau | Zoo pitting kuj; weldable | Acid media, chloride raug |
| S32205 / S32750 | Duplex / Super Duplex | Siab zog, zoo heev chloride kuj | Offshore, brine pipelines |
| Inconel 625/825 | Nickel Alloy | Exceptional tsis kam rau muaj zog acids thiab alkalis | Desulfurization, siab kub systems |
| Carbon Steel nrog Linings | Kab Hlau | Nqi-zoo, corrosion tiv thaiv los ntawm hauv ob sab phlu | Sulfur-nplua nuj roj, cov kab tsis tshua muaj siab |
Txheej Txheej: Lub cev tiv thaiv kev tiv thaiv corrosion
Sab nrauv thiab sab hauv txheej muab kev tiv thaiv kev tiv thaiv los thaiv cov khoom corrosive:
• Coal tar epoxy txheej:Cov txheej txheem ib txwm siv rau faus cov kav dej.
• Fusion Bonded Epoxy (FBE):Kub-kub kuj thiab muaj zog adhesion.
• 3-Layer PE / PP Txheej:Dav siv rau cov kav xa mus ntev.
Internal linings: Txo cov dej tsis kam thiab tiv thaiv sab hauv phab ntsa corrosion.
Kev npaj thiab siv tau zoo yog qhov tseem ceeb rau kev ua tau zoo ntawm cov txheej txheem no.
Kev Tiv Thaiv Cathodic: Electrochemical Anti-Corrosion Technology
Kev tiv thaiv Cathodic tiv thaiv electrochemical corrosion los ntawm kev yuam lub raj xa dej kom ua raws li cathode:
• Sacrificial Anode System: Siv zinc, magnesium, lossis txhuas anodes.
• Impressed Current System: Siv lub zog sab nraud los siv tam sim no.
Txoj kev no feem ntau siv rau hauv faus thiab subsea pipelines, feem ntau ua ke nrog coatings rau kev ua tau zoo tshaj plaws.
Corrosion saib xyuas thiab tu
Kev saib xyuas tsis tu ncua ua kom pom ntxov ntawm corrosion, txo cov kev pheej hmoo ntawm kev ua tsis tiav:
• Hluav taws xob tiv thaiv kev sojntsuam thiab Electrochemical Noise Monitoring rau kev tshuaj xyuas lub sijhawm;
• Ultrasonic Thickness Gauging rau phab ntsa thinning nrhiav tau;
• Corrosion Coupons rau kev ntsuam xyuas tus nqi corrosion nyob rau lub sijhawm.
Tsim kom muaj kev tshuaj xyuas niaj hnub, lub sijhawm tu, thiab kev kho tshuaj lom neeg pab tswj cov kav dej kom zoo.
Ua raws li Cov Qauv Kev Lag Luam
Xyuas kom koj lub raj xa dej tsim thiab cov tswv yim tiv thaiv ua raws li cov kev cai thoob ntiaj teb:
TS EN ISO 21809 Cov txheej txheem txheej txheej sab nrauv rau cov kav dej hauv kev lag luam roj av thiab cov nkev;
NACE SP0169 - Cov txheej txheem tiv thaiv Cathodic;
API 5L / ASME B31.3 - Kab yeeb nkab thiab txheej txheem kev tsim cov kav dej.
Xaus: Integrated Approach for Long-Term Protection
Kev tiv thaiv kev tiv thaiv kav dej kom zoo yuav tsum muaj ntau txheej txheej txheej txheem, suav nrog:
• Kev xaiv cov khoom ntse,
• Txheej txheej muaj zog,
• Proactive cathodic tiv thaiv, thiab
• Txhim khu kev saib xyuas thiab tu cov kev pab cuam.
Los ntawm kev siv cov txheej txheem kev tswj hwm kev txhim kho corrosion, cov neeg ua haujlwm petrochemical tuaj yeem txo qis kev kaw tsis tau npaj tseg, txuas ntxiv cov cuab yeej cuab tam, thiab ua kom muaj kev nyab xeeb, ua haujlwm tau zoo.
Post lub sij hawm: May-27-2025