Yuav ua li cas kom Passivate Stainless

Cov hlau tsis xeb yog paub dav rau nws qhov kev tiv thaiv xeb zoo heev, lub zog, thiab lub neej ntev. Tab sis txawm tias cov hlau tsis xeb qib siab tshaj plaws tuaj yeem tau txais txiaj ntsig los ntawm kev kho saum npoo hu uakev ua kom tsis muaj zogYog tias koj xav paubYuav ua li cas kom passivate stainless hlau, tsab xov xwm no yuav coj koj mus txog txhua yam koj xav paub—txij li cas passivation yog dab tsi, vim li cas nws thiaj tseem ceeb, thiab cov lus qhia ib kauj ruam zuj zus txog yuav ua li cas kom raug.

Phau ntawv qhia no yog coj los rau koj los ntawmsakysteel, tus neeg muab khoom thoob ntiaj teb uas ntseeg siab ntawm cov khoom siv hlau tsis xeb, muab kev txhawb nqa kev siv tshuab thiab cov ntaub ntawv zoo rau cov lag luam thoob ntiaj teb.

Passivation yog dab tsi?

Kev ua kom tsis muaj zogyog ib qho txheej txheem tshuaj lom neeg uas tshem tawm cov hlau dawb thiab lwm yam khoom tsis huv ntawm qhov chaw ntawm cov hlau tsis xeb thiab txhawb kev tsim cov txheej oxide nyias nyias, tiv thaiv. Cov txheej oxide no - feem ntau yog chromium oxide - ua haujlwm ua lub tiv thaiv tiv thaiv kev xeb thiab xeb.

Txawm hais tias cov hlau tsis xeb tsim cov txheej no thaum raug cua, cov txheej txheem passivation ua kom zoo dua thiab ruaj khov, tshwj xeeb tshaj yog tom qab cov txheej txheem tsim khoom xws li kev siv tshuab, vuam, sib tsoo, lossis kho cua sov.

Vim Li Cas Passivation Thiaj Tseem Ceeb

Kev ua kom tsis txhob lwj tsis yog ib kauj ruam xaiv tau xwb - nws yog qhov tseem ceeb hauv ntau lub lag luam uas xav tau cov qauv siab ntawm kev huv, kev tiv thaiv corrosion, thiab kev ruaj khov.

Cov txiaj ntsig ntawm kev siv passivating stainless hlau muaj xws li:

• Kev tiv thaiv xeb zoo dua

• Tshem tawm cov hlau uas tau muab tso rau hauv

• Kev tshem tawm ntawm qhov chaw ua qias tuaj

• Zoo dua qhov tsos ntawm qhov chaw

• Kev pab cuam ntev dua hauv cov chaw ib puag ncig hnyav

sakysteelpom zoo kom passivation tshwj xeeb tshaj yog rau cov khoom siv stainless siv hauv marine, tshuaj, zaub mov-qib, thiab kev lag luam ua tshuaj lom neeg.

Thaum Twg Koj Yuav Tsum Passivate Stainless Steel?

Yuav tsum xav txog qhov passivation tom qab txhua txoj kev uas yuav ua rau pom lossis ua rau lub ntsej muag ntawm cov hlau tsis xeb:

• Kev siv tshuab los yog txiav

• Vuam los yog brazing

• Kev ntxuav los yog kev tshem tawm cov av nplaum

• Kev sib tsoo los yog polishing

• Kev siv cov cuab yeej carbon steel

• Kev raug rau cov kuab paug lossis cov chaw muaj chloride

Yog tias koj cov khoom stainless hlau qhia txog kev hloov pauv xim, kev ua qias tuaj, lossis kev tiv thaiv corrosion tsawg dua, nws yog lub sijhawm los xav txog passivation.

Cov Qib Hlau Stainless Twg Thiaj Yuav Passivated?

Feem ntau cov hlau tsis xeb tuaj yeem raug passivated, tab sis cov txiaj ntsig tuaj yeem sib txawv raws li cov hlau sib xyaw.

sakysteelmuab cov lus qhia xaiv cov khoom siv los pab cov neeg siv khoom xaiv cov qib stainless uas passivate zoo thiab ua haujlwm tau zoo hauv cov chaw corrosive.

Yuav Ua Li Cas Thiaj Ua Rau Cov Hlau Stainless Passivate: Cov Kauj Ruam Ib Kauj Ruam

Muaj ob hom tshuaj passivation tseem ceeb siv hauv kev lag luam:

• Raws li nitric acidcov kev daws teeb meem

• Raws li citric acidkev daws teeb meem (phooj ywg rau ib puag ncig ntau dua)

Nov yog ib qho kev piav qhia dav dav ntawm cov txheej txheem passivation:

Kauj Ruam 1: Ntxuav Qhov Chaw

Ua ntej yuav siv passivation, yuav tsum tau ntxuav kom huv si. Tej av qias neeg, roj, roj nplaum, lossis tej yam seem yuav cuam tshuam rau cov tshuaj lom neeg.

Cov txheej txheem ntxuav suav nrog:

• Cov tshuaj ntxuav alkaline

• Cov tshuaj ntxuav roj

• Cov tshuaj ntxuav tes

• Kev ntxuav ultrasonic (rau cov khoom me me)

Yaug nrog dej huv thiab ziab yog tias xav tau.

Kauj Ruam 2: Tshem cov nplai los yog Pickle (Yog tias xav tau)

Yog tias qhov chaw ntawm cov hlau tsis xeb muaj cov nplai hnyav, weld oxides, lossis discoloration, ua ib qhokev ua kua txobua ntej passivation.

Kev pickling tshem tawm cov hauv qab no:

• Cov txheej oxide

• Kev sib txhuam ntawm qhov vuam

• Xim kub

Feem ntau pickling siv cov kua qaub muaj zog dua xws li nitric-hydrofluoric acid lossis pickling paste. Tom qab pickling, yaug kom huv si ua ntej pib passivation.

Kauj Ruam 3: Siv Cov Tshuaj Passivation

Muab qhov chaw ntxuav tso rau hauv lub dab da dej passivation lossis siv cov tshuaj manually.

Txoj kev siv nitric acid:

• Kev Ntsuas: 20–25% nitric acid

• Kub: 50–70°C

• Lub Sijhawm: 20–30 feeb

Txoj kev citric acid:

• Kev Ntsuas: 4–10% citric acid

• Kub: 40–60°C

• Lub Sijhawm: 30–60 feeb

Ib txwm sivcov thawv yas lossis cov hlau tsis xebkom tsis txhob muaj kuab paug thaum lub sijhawm immersion.

Kauj Ruam 4: Yaug kom huv si

Tom qab lub sijhawm xav tau hauv lub dab dej passivation, yaug qhov seem nrogdej deionized los yog dej distilledCov dej ntws los ntawm cov kais dej yuav tso cov zaub mov lossis cov khoom tsis huv tseg.

Xyuas kom tseeb tias tag nrho cov kua qaub seem raug tshem tawm tag nrho.

Kauj Ruam 5: Qhuav Qhov Chaw

Siv cua los yog daim ntaub huv los ziab kom qhuav. Tsis txhob cia cov cuab yeej ua los ntawm cov hlau carbon los yog cov ntaub qias neeg nkag mus rau hauv.

Rau cov ntawv thov tseem ceeb (piv txwv li, tshuaj lossis kev kho mob), cov khoom yuav raug ziab hauv chav huv lossis chav hla dhau.

Yeem xaiv: Sim qhov chaw

Cov khoom uas raug passivated yuav raug sim siv:

• Kev kuaj tooj liab sulfate(ASTM A967): Nrhiav tau hlau dawb

• Kev sim chav tsev uas muaj av noo ntau: Tso cov khoom rau hauv qhov chaw noo noo kom paub tseeb tias tsis xeb

• Kev ntsuam xyuas dej los yog kev ntsuam xyuas ntsev: Rau kev ntsuam xyuas kev ua haujlwm corrosion ntau dua

sakysteelsiv ASTM A967 thiab A380 cov qauv los xyuas qhov zoo ntawm passivation thiab xyuas kom meej tias muaj kev tiv thaiv corrosion zoo tshaj plaws.

Cov Lus Qhia Txog Kev Nyab Xeeb Rau Kev Siv Passivation

• Ib txwm hnav cov khoom siv tiv thaiv: hnab looj tes, tsom iav, thiab apron

• Ua haujlwm nyob rau hauv ib qho chaw uas muaj cua nkag tau zoo

• Ua kom cov kua qaub tsis muaj zog thiab pov tseg raws li cov cai hauv zos

• Tsis txhob siv cov txhuam hlau lossis cov cuab yeej uas tuaj yeem rov ua kom cov pa phem rov qab los.

• Khaws cov khoom seem uas tsis tau siv rau hauv qhov chaw huv si thiab qhuav

Cov Ntawv Thov Uas Yuav Tsum Tau Passivated Stainless Steel

Passivation yog qhov tseem ceeb rau cov khoom siv hauv:

• Cov khoom siv ua zaub mov thiab dej haus

• Cov tshuab kho mob thiab tshuaj

• Cov qauv aerospace thiab aviation

• Cov nroj tsuag tshuaj lom neeg thiab petrochemical

• Kev tsim khoom siv semiconductor

• Cov chaw teeb tsa hauv dej hiav txwv thiab ntug dej hiav txwv

sakysteelmuab cov khoom siv hlau tsis xeb uas npaj txhij rau txhua daim ntawv thov saum toj no, txhawb nqa los ntawm kev taug qab cov khoom siv thiab cov ntawv pov thawj zoo.

Lwm Txoj Kev Xaiv thiab Kev Kho Mob Nto Uas Muaj Feem Xyuam

Ntxiv rau qhov passivation, qee qhov project yuav tau txais txiaj ntsig los ntawm:

• Kev siv hluav taws xob:Tshem tawm ib txheej nyias nyias rau qhov tiav huv si thiab du

• Kev txhuam kom huv:Ua kom qhov ci ntsa iab ntawm qhov chaw thiab tshem tawm cov kuab paug

• Kev Txua:Muaj zog dua li passivation, siv los ntxuav cov welds thiab scaling

• Cov txheej tiv thaiv:Epoxy, Teflon, lossis ceramic coatings rau kev ua kom ruaj khov ntxiv

Sab lajsakysteeltxhawm rau txiav txim siab qhov kev kho mob zoo tshaj plaws tom qab tsim khoom rau koj daim ntawv thov stainless.

Xaus Lus: Yuav Ua Li Cas Kom Cov Hlau Stainless Passivate Rau Qhov Ua Tau Zoo Tshaj Plaws

Kev siv tshuaj passivation yog ib qho txheej txheem tseem ceeb uas ua rau cov hlau tsis xeb tsis xeb zoo dua los ntawm kev ntxuav thiab kho nws cov txheej chromium oxide tiv thaiv. Txawm hais tias koj ua haujlwm hauv kev lag luam zaub mov, kev tsim tshuaj, lossis kev tsim khoom hauv dej hiav txwv, kev siv tshuaj passivation rau koj cov khoom siv hlau tsis xeb ua kom lawv ua haujlwm tau zoo tshaj plaws hauv qhov chaw nyuaj.

Yog tias ntxuav kom huv, muab tso rau hauv dej, yaug, thiab sim kom zoo, cov hlau tsis xeb tuaj yeem ua tiav nws lub peev xwm tag nrho hauv kev ruaj khov thiab tiv taus xeb. Thiab nrog kev txhawb nqa ntawm tus neeg muag khoom txhim khu kev qha zoo lisakysteel, koj tuaj yeem xyuas kom meej tias koj cov ntaub ntawv stainless hlau tau ua tiav zoo thiab npaj txhij rau kev pabcuam.