Kev Tsim Kho Khoom Siv Tshiab: Kev Tshawb Fawb Txog Kev Ua Haujlwm ntawm Cov Flanges Hlau Stainless hauv Cov Chaw Uas Muaj Kev Kub Ntxhov

Cov Lus Qhia Tseem Ceeb ntawm Cov Khoom:

• Cov Khoom Sib Xyaws:Cov ntaub ntawv tseem ceeb rau cov hlau tsis xeb cov flanges yog 304 lossis 316 stainless hlau. Tus thawj muaj 18% chromium thiab 8% nickel, tsim nyog rau cov chaw nruab nrab; tus tom kawg ntxiv 2-3% molybdenum, txhim kho kev tiv thaiv rau chloride ion corrosion.

• Cov Khoom Siv Kho Tshuab:Raws li tus qauv ASTM A182, lub zog tensile ntawm cov hlau tsis xeb flanges tuaj yeem ncav cuag 500-600 MPa, siab dua li 400 MPa ntawm Cov Hlau CarbonDaim duab qhia kab hauv qab no qhia txog kev sib piv lub zog tensile ntawm cov ntaub ntawv flange feem ntau (chav: MPa), qhia txog kev ua tau zoo ntawm cov hlau tsis xeb.

• Txoj Kev Sib Txuas:Cov flanges hlau tsis xeb txhawb nqa ntau hom kev sib txuas xws li vuam thiab bolting, kom ntseeg tau tias muaj kev sib khi zoo.

• Cov Khoom Siv Tshwj Xeeb:Pawg no kuj suav nrog Duplex thiab Super Duplex stainless steels, uas ua tau zoo heev nyob rau hauv cov chaw muaj chloride ntau, tiv taus pitting thiab kev ntxhov siab corrosion cracking.

• Txoj Kev Tiv Thaiv Kev Xeb:Qhov kev tiv thaiv xeb ntawm cov hlau tsis xeb yog los ntawm ib txheej chromium oxide uas tsim rau ntawm qhov chaw. Txheej no kho nws tus kheej, muab kev tiv thaiv mus sij hawm ntev.

• Kev Ua Tau Zoo Hauv Cov Chaw Acidic:Cov hlau tsis xeb muaj kev tiv taus zoo rau feem ntau cov kua qaub, nyob ntawm qhov concentration thiab hom. Piv txwv li, hauv cov kua qaub sulfuric concentrated, qhov corrosion rate yuav qis li micrometers ib xyoos.

• Kev Ua Haujlwm:Thaum lub sijhawm tsim khoom, cov flanges stainless hlau feem ntau raug kho cua sov kom zoo dua cov qauv siv lead ua thiab txhim kho kev tawv. Tom qab vuam, lawv feem ntau raug pickled thiab passivated los txhim kho cov txheej txheem tiv thaiv.

Daim duab qhia kab hauv qab no piv rau lub zog tensile (chav: MPa) ntawm cov khoom siv sib xws flange cov ntaub ntawv, qhia txog kev ua tau zoo ntawm cov hlau tsis xeb:

Cov ntaub ntawv hauv daim duab qhia tau hais tias cov hlau tsis xeb muaj lub zog ntawm 515 MPa, ua rau tus nqi deformation tsuas yog 0.2% nyob rau hauv qhov kub thiab txias siab, thaum PVC, nrog lub zog ntawm tsuas yog 50 MPa, yog qhov tsim nyog rau cov xwm txheej qis-siab.

Cov ntaub ntawv sim qhia tau hais tias nyob rau hauv ib puag ncig ntsev tsuag, qhov corrosion ntawm stainless hlau flanges tsuas yog 0.01 hli / xyoo, uas yog 10 npaug qis dua 0.1 hli / xyoo ntawm carbon hlau, ua rau kaum npaug ntawm kev ua haujlwm lub neej. Tshwj xeeb:

• 304 Cov Hlau Stainlesstuaj yeem tiv taus cov chaw ib puag ncig nrog cov chloride ion concentration txog li 200 PPM.

• 316 Cov Hlau Stainlessmuaj kev tiv thaiv siab dua, txo qis qhov kev ua tsis tiav ntawm corrosion hauv kev tsim kho marine.

Hauv cov ntawv thov xws li cov nroj tsuag sulfuric acid, cov hlau tsis xeb tswj tau qhov corrosion zoo txawm tias nyob rau qhov kub siab ntawm 200 ° C. Ntxiv mus, hauv kev lag luam tshuaj, cov flanges hlau tsis xeb xav tau qhov chaw tiav siab, feem ntau qis dua Ra 0.8μm, los tiv thaiv kev loj hlob ntawm cov kab mob.

Daim Ntawv Qhia Txog Kev Ua Haujlwm ntawm Cov Khoom Siv

Raws li cov ntaub ntawv tau muab, cov flanges hlau tsis xeb tau dhau los ua qhov kev xaiv zoo tshaj plaws hauv cov chaw muaj xeb, tsav kev loj hlob ntawm kev lag luam. Cov kev tshawb fawb txog cov ntaub ntawv qhia tau tias lawv ua tau zoo:

• Hauv ib lub Hoobkas tshuaj lom neeg, lub neej ua haujlwm ntawm cov khoom siv tau ntev dua los ntawm 5–10 xyooTom qab siv 316 stainless hlau flanges, cov nqi txij nkawm tau txo qis heev.

• Nyob rau ntawm lub platform drilling offshore, kev siv ob chav stainless hlauua rau muaj ib qho Txo 30%hauv kev puas tsuaj ntsig txog corrosion.

Daim duab hauv qab no qhia txog cov txiaj ntsig no:

Yuav kom muab tau ib daim duab qhia ntxiv txog cov qauv sab hauv thiab cov txheej txheem ntawm cov hlau tsis xeb, cov duab qhia ntxiv hauv qab no qhia txog nws cov khoom sib xyaw thiab kev kho qhov chaw:

Kev txhim kho yav tom ntej ntawm cov hlau tsis xeb flanges suav nrog nano-txheej txheem thev naus laus zis los txhim kho kev tiv thaiv corrosion, nrog rau kev siv cov khoom siv rov ua dua tshiab hauv kev tsim khoom ruaj khov kom txo qhov cuam tshuam rau ib puag ncig.