Puas yuav 304 Stainless Hlau Rust?
Nov 23, 2023
Puas yuav 304 stainless hlau xeb?
Taw qhia:
Stainless hlau yog cov khoom siv dav siv paub txog nws cov khoom tiv thaiv corrosion. Lub 304 qib stainless hlau, tshwj xeeb, yog feem ntau siv vim nws zoo heev tiv thaiv xeb thiab lwm yam ntaub ntawv ntawm corrosion. Nyob rau hauv tsab xov xwm no, peb yuav delve rau hauv cov laj thawj tom qab corrosion kuj ntawm 304 stainless hlau thiab tshawb txog ntau yam uas tuaj yeem ua rau nws xeb nyob rau qee qhov xwm txheej.
Corrosion thiab Stainless Hlau:
Corrosion, txheej txheem ntuj tsim, tshwm sim thaum hlau reacts nrog nws ib puag ncig, ua rau nws deterioration. Stainless hlau, txawm li cas los xij, muaj cov khoom tshwj xeeb uas ua rau nws tiv taus corrosion heev. Qhov tseem ceeb nyob rau hauv nws cov alloy muaj pes tsawg leeg, feem ntau muaj hlau, chromium, thiab npib tsib xee.
Lub luag haujlwm ntawm Chromium:
Ib qho ntawm cov ntsiab lus tseem ceeb uas ua rau kev txhim kho corrosion ntawm stainless hlau yog chromium. Thaum chromium reacts nrog oxygen nyob rau hauv cov huab cua, nws tsim ib txheej nyias, tiv thaiv chromium oxide nyob rau saum npoo ntawm cov hlau. Cov txheej no ua raws li kev thaiv, tiv thaiv kev sib cuag ntawm cov hlau thiab cov khoom corrosive hauv ib puag ncig.
304 Stainless hlau:
304 stainless hlau, tseem hu ua A2 stainless hlau (raws li ISO kev faib tawm), yog austenitic stainless hlau alloy. Nrog rau cov hlau, nws muaj 18-20% chromium thiab 8-10.5% npib tsib xee, uas muab kev tiv thaiv corrosion zoo heev. Tsis tas li ntawd, nws muaj me me ntawm manganese, nitrogen, thiab carbon.
Passivation thiab 304 Stainless Hlau:
Passivation yog cov txheej txheem ntawm kev txhim kho corrosion kuj ntawm stainless hlau los ntawm kev txhawb kev tsim cov txheej txheem oxide tiv thaiv. 304 stainless hlau undergoes natural passivation thaum raug oxygen nyob rau hauv qhov chaw. Qhov tshwm sim no, hu ua self-passivation, feem ntau yog vim muaj chromium nyob rau hauv cov hlau.
Cov yam ntxwv cuam tshuam rau 304 Stainless Hlau Corrosion:
Thaum 304 stainless hlau tiv taus xeb thiab xeb, qee yam tuaj yeem cuam tshuam nws cov txheej txheem oxide tiv thaiv thiab ua rau xeb. Nws yog ib qho tseem ceeb uas yuav tau xav txog cov xwm txheej no kom ntseeg tau tias lub neej ntev thiab ua haujlwm ntev ntawm cov khoom siv stainless hlau.
1. Tso rau chlorides:
Chlorides, xws li ntsev los yog chlorine, tshwj xeeb tshaj yog tsim kev puas tsuaj rau stainless hlau. Kev raug chlorides tuaj yeem rhuav tshem cov txheej txheem oxide tiv thaiv, ua rau cov hlau raug xeb. Yog li ntawd, nyob rau hauv ntug dej hiav txwv los yog high-chloride ib puag ncig, 304 stainless hlau yuav xav tau kev tiv thaiv ntxiv los yog kev saib xyuas tsis tu ncua kom tsis txhob muaj corrosion.
2. Qib Oxygen qis:
Rau kev tsim cov txheej txheem tiv thaiv chromium oxide, stainless hlau xav tau cov pa oxygen txaus. Nyob rau hauv ib puag ncig uas tsis tshua muaj oxygen, xws li dej tsis tu ncua lossis cov txheej txheem faus, cov txheej txheem tiv thaiv tuaj yeem raug cuam tshuam, ua rau xeb tsim.
3. Acids thiab Tshuaj:
304 stainless hlau feem ntau muaj kev tiv thaiv zoo rau cov kua qaub thiab cov tshuaj feem ntau. Txawm li cas los xij, kev cuam tshuam tshwj xeeb los yog cov kua qaub uas muaj zog tuaj yeem ua rau cov txheej txheem tiv thaiv thiab ua rau corrosion. Nws yog ib qho tseem ceeb los xaiv cov qib stainless hlau tsim nyog rau ib puag ncig tshuaj lom neeg.
4. Mechanical Damage:
Kev puas tsuaj rau lub cev ntawm cov hlau tsis muaj hlau, xws li khawb, khawb, lossis khawb, tuaj yeem cuam tshuam cov txheej txheem oxide tiv thaiv. Qhov kev puas tsuaj no txo qis qhov kev tiv thaiv corrosion ntawm cov hlau, tso cai rau xeb kom loj hlob hauv cov cheeb tsam cuam tshuam.
Tiv thaiv xeb ntawm 304 Stainless Hlau:
Txhawm rau kom muaj kev tiv thaiv corrosion ntawm 304 stainless hlau, nws yog ib qho tseem ceeb uas yuav tsum tau ua kev tiv thaiv kev tiv thaiv thiab ua raws li kev saib xyuas thiab kev tu kom zoo.
1. Kev ntxuav tu tsis tu ncua:
Kev tu tsis tu ncua, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas muaj cov pa phem los yog cov kab mob sib kis, pab tshem tawm cov khoom pov tseg uas tuaj yeem cuam tshuam cov txheej txheem tiv thaiv. Cov xab npum me me los yog cov tshuaj ntxuav tes, dej sov, thiab cov ntaub ntawv tsis txhuam lossis daim txhuam cev yog tsim nyog rau kev ntxuav cov hlau tsis huv.
2. Tsis txhob muaj tshuaj lom neeg:
Tsis txhob nthuav tawm 304 stainless hlau rau aggressive acids los yog tshuaj tshaj nws cov peev xwm kuj. Tham nrog cov kws tshaj lij, xws li cov khoom siv engineers, kom ntseeg tau tias cov qib tsim nyog raug xaiv rau qee qhov chaw tshuaj lom neeg.
3. Tswj cov tshuaj chloride raug:
Hauv thaj chaw uas muaj chloride nplua nuj, xws li nyob ze ntawm ntug dej hiav txwv lossis hauv cov pas dej da dej, nws yog ib qho tseem ceeb kom txo tau cov tshuaj chlorides ncaj qha. Kev niaj zaus yaug lossis ntxuav nrog dej tshiab tuaj yeem pab tshem tawm cov chloride deposits, txo qhov muaj feem ntawm corrosion.
Xaus:
304 stainless hlau muaj npe nrov rau nws cov khoom tiv thaiv corrosion, feem ntau vim muaj chromium nyob rau hauv nws cov alloy muaj pes tsawg leeg. Thaum nws muaj peev xwm tiv taus xeb, qee yam xws li raug cov tshuaj chlorides, cov pa oxygen tsawg, cov kua qaub, thiab cov neeg kho tshuab puas tuaj yeem cuam tshuam nws cov corrosion kuj. Los ntawm kev nkag siab txog cov xwm txheej no thiab siv cov kev tiv thaiv, peb tuaj yeem ua kom lub neej ntev thiab kev ua haujlwm zoo ntawm 304 stainless hlau cov khoom.