Pickling thiab passivation ntawm stainless hlau luj tshib - qhov piv ntawm pickling kua thiab passivating kua

2024-02-11 IB

Dab tsi yog pickling thiab passivation kev kho mob ntawm stainless hlau luj tshib?

Cov nplai oxide dub thiab daj yuav tshwm sim thaum lub sij hawm ua cov luj tshib stainless hlau. Txhawm rau txhim kho qhov tsos thiab corrosion tsis kam ntawm stainless hlau luj tshib, cov txheej txheem stainless hlau luj tshib yuav tsum tau khaws thiab passivated. Stainless hlau luj tshib pickling yog tshem tawm cov oxide nplai ua tom qab vuam thiab kub ua haujlwm ua kom lub ci thiab ci. Stainless hlau luj tshib passivation yog tsim cov oxide zaj duab xis nrog chromium raws li cov khoom tseem ceeb ntawm qhov chaw kho kom tsis txhob oxidation theem nrab, yog li txhim kho qhov zoo ntawm cov hlau tsis xeb ntawm lub luj tshib thiab txuas ntxiv lub neej kev pab cuam ntawm cov khoom siv.

Pickling thiab passivation ntawm stainless hlau yeeb fittings feem ntau kho nrog pickling passivation muab tshuaj txhuam thiab pickling passivation kua. Pickling passivation paste synchronizes pickling thiab passivation thiab ua tiav nws nyob rau hauv ib kauj ruam, hloov cov tsoos pickling thiab passivation txheej txheem. Kev siv tshuaj lom neeg, kev ua haujlwm yooj yim, kev tsim kho yooj yim thiab tus nqi qis. Haum rau pleev xim rau thaj tsam loj thiab txoj kab uas hla loj stainless hlau yeeb nkab fittings. Cov tshuaj pickling passivation yog tsim rau kev ua haujlwm ntub dej ntawm cov kab me me stainless hlau yeeb nkab fittings.

Cia peb tham txog qhov sib xyaw ntawm cov kua dej uas nquag siv thiab cov kua dej tsis zoo rau cov yeeb nkab steel hlau. Pickling kua, passivation kua thiab pickling muab tshuaj txhuam mis

Pickling tov: 20% nitric acid + 5% hydrofluoric acid + 75% dej

Passivation tov: 5% nitric acid + 2% poov tshuaj dichromate + 93% dej

Cov kauj ruam siv stainless hlau pickling passivation tov:

1. Kho cov roj stains ntawm lub luj tshib stainless hlau thiab polish nws;

2. Ncuav cov tshuaj passivation rau hauv lub thawv yas. Nyob ntawm cov khoom siv ntawm lub luj tshib stainless hlau thiab qib ntawm oxidation, koj tuaj yeem siv cov tshuaj qub lossis dilute nws hauv qhov sib piv ntawm 1: 1-4 ua ntej siv;

3. Soak lub luj tshib stainless hlau yuav tsum tau kho hauv cov kua, feem ntau ntawm qhov kub thiab txias, los yog nws tuaj yeem ua kom sov rau 40-50 degrees rau kev ua haujlwm. Lub sij hawm ntub dej yog 3-20 feeb lossis ntau dua, thiab lub sijhawm tshwj xeeb thiab kub tuaj yeem txiav txim siab raws li qhov xwm txheej tiag tiag;

4. Kom txog rau thaum cov av nyob rau saum npoo ntawm stainless hlau luj tshib yog kiag li tshem tawm thiab tshwm uniformly ci silvery dawb, uas txhais tau hais tias lub pickling thiab passivation tiav, tshem tawm cov stainless hlau luj tshib, yaug nrog dej huv, thiab qhuav nws.

Tom qab pickling thiab passivation kev kho mob ntawm stainless hlau yeeb nkab fittings, nws yuav tsis cuam tshuam rau cov conductivity ntawm cov khoom, hloov cov khoom muaj pes tsawg leeg, los yog cuam tshuam rau cov khoom sib txuas xws li tshuaj tsuag.

1. Qhov chaw nruab nrab ntawm ob qhov kawg yog qhov sib txawv

Lub hauv paus ntsiab lus ntawm ob qhov kawg ntawm stainless hlau eccentric reducer tsis nyob rau tib axis.

Cov ntsiab lus nruab nrab ntawm ob qhov kawg ntawm stainless hlau concentric reducer yog nyob rau tib axis.

2. Qhov chaw ua haujlwm sib txawv

Ib sab ntawm stainless hlau eccentric reducer yog tiaj. Qhov kev tsim no ua kom yooj yim tso pa tawm los yog kua dej thiab ua kom yooj yim txij nkawm. Yog li ntawd, nws feem ntau yog siv rau kab rov tav cov kav dej.

Lub hauv paus ntawm stainless hlau concentric reducer yog nyob rau ntawm ib txoj kab, uas yog qhov tsim nyog rau cov kua dej ntws thiab tsis muaj kev cuam tshuam nrog cov qauv ntws ntawm cov kua dej thaum lub sij hawm txoj kab uas hla. Yog li ntawd, nws yog feem ntau siv rau txoj kab uas hla txo cov roj los yog ntsug cov kav dej.

3. Cov txheej txheem installation sib txawv

Stainless hlau eccentric reducers yog tus cwj pwm los ntawm cov qauv yooj yim, kev tsim khoom yooj yim thiab siv tau, thiab tuaj yeem ua tau raws li ntau yam kev xav tau ntawm cov kav dej. Nws daim ntawv thov scenarios feem ntau suav nrog:

Kab rov tav cov yeeb nkab kev sib txuas: Txij li cov ntsiab lus nruab nrab ntawm ob qhov kawg ntawm stainless hlau eccentric reducer tsis nyob rau tib kab kab rov tav, nws tsim nyog rau kev sib txuas ntawm cov kav dej kab rov tav, tshwj xeeb tshaj yog thaum cov yeeb nkab txoj kab uas hla yuav tsum tau hloov.

Pump inlet thiab regulating valve installation: Sab saum toj ca installation thiab hauv qab ca installation ntawm stainless hlau eccentric reducer yog tsim rau lub installation ntawm lub twj tso kua mis inlet thiab regulating valve feem, uas yog zoo rau tso tawm thiab tawm.

Stainless hlau concentric reducers yog tus cwj pwm los ntawm kev cuam tshuam tsawg dua rau cov kua dej ntws thiab tsim nyog rau txo txoj kab nruab nrab ntawm cov pa roj los yog cov kav dej ntsug. Nws daim ntawv thov scenarios feem ntau suav nrog:

Gas los yog ntsug kua pipeline kev twb kev txuas: Txij li thaum lub nruab nrab ntawm ob kawg ntawm stainless hlau concentric reducer yog nyob rau tib axis, nws yog tsim nyog rau kev sib txuas ntawm cov roj los yog ntsug kua kav, tshwj xeeb tshaj yog nyob rau hauv lub cheeb yuav tsum tau txo.

Xyuas kom muaj kev ruaj ntseg ntawm cov dej ntws: Cov stainless hlau concentric reducer muaj kev cuam tshuam me ntsis nrog cov kua dej ntws tawm thaum lub sij hawm txoj kab uas hla txo thiab tuaj yeem ua kom ruaj khov ntawm cov dej ntws.

4. Kev xaiv ntawm eccentric reducers thiab concentric reducers nyob rau hauv daim ntawv thov

Hauv kev siv tiag tiag, cov reducers tsim nyog yuav tsum raug xaiv raws li cov xwm txheej tshwj xeeb thiab cov kev xav tau ntawm cov kav dej sib txuas. Yog tias koj xav tau txuas cov kav dej kab rov tav thiab hloov cov yeeb nkab txoj kab uas hla, xaiv stainless hlau eccentric reducers; Yog tias koj xav tau txuas cov kav dej los yog cov kav dej ntsug thiab hloov txoj kab uas hla, xaiv stainless hlau concentric reducers.