Kev tiv thaiv- kev kho corrosion ntawm qhov ntev- cov kav xa hluav taws xob nyob deb yog qhov kev ntsuas tseem ceeb rau kev ruaj ntseg hluav taws xob, tiv thaiv ib puag ncig thiab txo kev lag luam poob. Cov lus hauv qab no tuaj yeem pab koj nkag siab sai sai rau cov laj thawj tseem ceeb.
| Qhov tsim nyog ntawm kev khaws cia | Kev piav qhia ntawm cov laj thawj tseem ceeb |
| Kev Nyab Xeeb Kev Nyab Xeeb | Tiv thaiv kom tsis txhob muaj roj av vim corrosion thiab perforation, yog li tsis txhob muaj kev puas tsuaj loj xws li hluav taws kub thiab tawg. |
| Kev tiv thaiv kev lag luam | Qhov tseem ceeb extends lubkev pabcuam lub neejntawm cov kav dej, txo cov nqi cuam tshuam nrog kev hloov pauv thiab kho cov kav dej vim yog corrosion, thiab zam kev poob ncaj qha thiab tsis ncaj |
| Ib puag ncig thiab kev nyab xeeb rau pej xeem | Tiv thaiv kom tsis txhob muaj cov pa phem los ntawm kev ua phem rau cov av thiab cov huab cua, thiab ua kom muaj kev nyab xeeb ntawm lub neej thiab cov khoom ntawm cov neeg nyob hauv txoj kev. |
| Xyuas kom muaj kev thauj mus los zoo thiab zoo |
Sab hauv phab ntsa tiv thaiv -corrosion tuaj yeem txo cov pa phem ntawm cov khoom corrosive rau cov pa roj, ua kom cov purity ntawm cov thauj nruab nrab, thiab tib lub sij hawm txo cov roughness ntawm cov raj xa dej sab hauv phab ntsa, yog li txhim kho kev thauj mus los. |
Tau txais kev nkag siab zoo txog kev hem thawj ntawm corrosion
Pipeline corrosion feem ntau yog los ntawm ob yam: sab hauv thiab sab nraud. Nws cov mechanism yog complex thiab qhov kev puas tsuaj nws ua yog heev tseem ceeb.
• Sab nrauv Corrosion:
"Phidden killer" rau cov kav dej. Cov kav dej hauv av tseem nyob hauv ib puag ncig electrolyte ntawm cov av rau lub sijhawm ntev, uas yuav ua rau muaj tshuaj lom neeg, electrochemical corrosion, thiab microbial corrosion. Cov yam ntxwv xws li av pH qib, av noo, cov ntsiab lus oxygen, thiab cov stray tam sim no tuaj yeem ua kom cov txheej txheem corrosion. Rau cov kav dej siv hluav taws xob, lawv yuav tsum ncaj qha tiv thaiv atmospheric corrosion, tshwj xeeb tshaj yog nyob rau hauv qhov chaw ntub dej uas muaj cov pa phem (xws li sulfur dioxide), qhov twg corrosion yuav nrawm heev.
• Sab hauv corrosion:
"Internal hem" hauv kev thauj mus los nruab nrab. Nyob rau hauv cov pa roj, tej zaum yuav muaj acidic impurities xws li dej, hydrogen sulfide (H₂S), thiab carbon dioxide (CO₂) uas tuaj yeem tsim cov kua qaub rau ntawm phab ntsa sab hauv ntawm lub raj xa dej, ua rau electrochemical corrosion. Nyob rau hauv siab - siab thiab siab - kev thauj mus los ceev, kev yaig ntawm cov kav dej los ntawm qhov nruab nrab yuav ua rau muaj kev puas tsuaj ntxiv rau cov kav dej.
Lub ntsiab tiv thaiv -corrosion technologies
Txhawm rau daws cov teeb meem no, engineering feem ntau siv cov tswv yim tiv thaiv ua ke:
1. Txheej tiv thaiv (kev cais lub cev)
Qhov no yog qhov tseem ceeb tshaj plaws thiab tseem ceeb tiv thaiv kev ntsuas, sib npaug rau kev muab cov raj xa dej rau "kev tiv thaiv".
◦ Sab nrauv los tiv thaiv -corrosion txheej:
xws li peb- txheej PE (polyethylene) qauv, uas sib txuas cov adhesion ntawm epoxy hmoov, sealing cov cuab yeej ntawm cov nplaum, thiab lub zog txhua yam ntawm polyethylene. Tam sim no nws yog lub ntsiab lus siab - txheej txheej.
◦ Internal tiv thaiv -corrosion txheej:
Siv epoxy resin thiab lwm yam khoom siv rau ntawm phab ntsa sab hauv ntawm cov kav dej. Qhov no tsis tsuas yog tiv thaiv corrosion tab sis kuj txo qhov kev tiv thaiv thaum lub sij hawm thauj mus los.
2. Kev tiv thaiv hluav taws xob (Active Defense)
Ntawm lub hauv paus ntawm txheej, muab kev ruaj ntseg ntxiv.
◦Txoj kev Sacrificial Anode:
Txuas cov hlau ntau dua (xws li magnesium los yog zinc) rau hauv cov kav dej thiab cia nws "siv nws tus kheej" los tiv thaiv cov kav dej.
◦Kev Tiv Thaiv Anodic los ntawm Sab Nraud Tam Sim No:
Siv cov khoom siv hluav taws xob sab nraud, cov raj xa dej tau tsim cov anode los tiv thaiv corrosion. Txoj kev no haum rau cov kav dej ntev -.
Cov ntsiab lus
Kev tiv thaiv- kev kho corrosion ntawm qhov ntev -ntaus cov raj xa hluav taws xob yog ib txoj haujlwm tseem ceeb ntawm kev nyab xeeb. Nws ntiav ib txoj hauv kev los ua ke nrog cov txheej txheem tiv thaiv kev tiv thaiv hluav taws xob thiab hluav taws xob hluav taws xob los tsim kom muaj kev tiv thaiv kab mob, uas cuam tshuam ncaj qha rau kev lag luam hauv teb chaws, tib neeg txoj kev ua neej, thiab kev nyab xeeb ntawm pej xeem.
