Dab tsi yog qhov zoo dua rau Acid Baths: PTFE lossis Stainless Steel Heating Phaj?

cua sov rau 80℃ntawm ib tug plating da dej. Cov chemistry yog acid-sulfate lossis hydrochloric. Hauv ntau daim ntawv thov stainless hlau yog tus qauv. Nyob rau hauv cov huab cua no nws yuav pit thiab corrode nyob rau hauv lub hlis. PTFE tau lees paub rau nws qhov tsis muaj zog, tab sis nws puas tsim nyog tus nqi pib ntau dua? Tam sim no cia saib yuav ua li cas ob cov ntaub ntawv teb thaum cov tshuaj hloov tsis zoo.

Vim li cas Acid Baths Qhia Txog Kev Txwv ntawm Stainless Hlau
Stainless hlau cua sov daim hlau yog dav siv, tshwj xeeb tshaj yog SUS304 thiab SUS316L, vim lawv ua ke ntawm txhua yam muaj zog, thermal conductivity thiab nruab nrab corrosion kuj. Tab sis lawv cov corrosion kuj tsis yog kiag li. Nws yog raws li ib txheej nyias nyias uas ua rau saum npoo - feem ntau chromium oxide.


Cov txheej txheem oxide no ua rau cov hlau tsis cuam tshuam nrog ib puag ncig hauv ib puag ncig. Cov txheej tiv thaiv yog tsis yooj yim nyob rau hauv acidic tshuaj da dej, tshwj xeeb tshaj yog yog hais tias muaj chlorides. Piv txwv li, hydrochloric acid hauv zos tuaj yeem ua rau cov txheej txheem tsis zoo, thiab nthuav tawm cov hlau hauv qab. Thaum qhov no tshwm sim corrosion tsis tsim uniformly saum npoo tab sis accumulates nyob rau hauv tsawg me ntsis los tsim pits. Cov pits tob zuj zus nrog lub sijhawm thiab thaum kawg permeate cov khoom.

SUS316L muaj molybdenum, uas txhim kho kev tiv thaiv pitting corrosion, yog li nws zoo dua SUS304 hauv acidic tej yam kev mob. Txawm li cas los xij, txawm tias 316L muaj cov kev txwv hauv cov kua qaub uas muaj zog, ntawm qhov kub thiab txias rau lub sijhawm ntev. Lub microscopic deterioration ntawm nto yuav pom pitting thiab thaum kawg lub phaj cua sov yuav tsum tau hloov. Hauv kev lag luam tas mus li, xws li electroplating, chemical processing, lossis acid cleaning, lub voj voog ntawm degradation no yuav nrawm dua li qhov xav tau.

Corrosion Mechanism ntawm PTFE - Ib txwm Inert
PTFE tsis muaj txheej txheej tiv thaiv zoo li stainless hlau. Corrosion kuj yog kev koom ua ke rau hauv nws cov qauv molecular. PTFE muaj cov pa roj carbon - fluorine daim ntawv cog lus, uas yog ib qho ntawm cov khoom muaj zog tshaj plaws hauv cov organic chemistry. Raws li qhov tshwm sim feem ntau cov kua qaub suav nrog sulfuric acid, hydrochloric acid thiab txawm tias cov tshuaj oxidising heev tsis tuaj yeem tua cov khoom.

Qhov no txhais tau hais tias PTFE tsis corrode nyob rau hauv qhov kev txiav txim zoo. Tsis muaj txheej txheej passive los rhuav tshem thiab tsis muaj tshuaj lom neeg cov tshuaj tiv thaiv ntawm qhov chaw thiab cov kua qaub da dej. Lub PTFE nto tiv taus cov khoom hnyav txawm tias tom qab ntev - raug . PTFE txheej txheej tiv thaiv cov cua sov hauv lub phaj, thiab qhov chaw uas los rau hauv kov nrog cov kua yog tshuaj inert.

Qhov sib txawv no yog qhov tseem ceeb ntawm cov tswv yim. Stainless hlau yuav tsum sib ntaus sib tua corrosion nrog nyias oxide txheej. PTFE tsis tas yuav sib ntaus sib tua. Nws tsuas yog tsis nyiam raug tshuaj lom vim tias cov khoom nws tus kheej tsis yog -reactive. Yog li, qhov chaw saum npoo ntawm PTFE cua sov phaj tsis hloov tom qab ntev - siv nyob rau hauv corrosive tej yam kev mob.

Hlau Ion Contamination thiab Txheej Txheem Stability
Kev kis kab mob yog ib qho tseem ceeb tshaj plaws thiab feem ntau tsis saib xyuas cov teeb meem hauv cov kua qaub cua sov. Thaum cov hlau tsis muaj hlau pib xeb, txawm tias nyob rau hauv ib qho microscopic, nws tso cov hlau ions, xws li hlau, chromium thiab npib tsib xee mus rau hauv da dej. Qhov no yuav tsis pom tseeb hauv ntau cov txheej txheem kev lag luam, tab sis nws tuaj yeem maj mam degrade qhov zoo ntawm qhov tshwm sim.

Piv txwv li, cov kab hlau tsis huv hauv cov ntawv thov electroplating tuaj yeem cuam tshuam rau plating uniformity thiab nto tiav. Hauv cov txheej txheem semiconductor lossis cov txheej txheem tshuaj txawm tias qhov me me ntawm cov hlau ions tuaj yeem tsis pom zoo. Dab tsi zoo li ntev - cov phaj cua sov kav ntev yuav ua rau muaj kev tsis ruaj khov nyob rau hauv tag nrho cov txheej txheem tsim khoom nyob rau hauv txoj kev ntsiag to.

PTFE cua sov daim hlau tshem tawm qhov kev pheej hmoo no. PTFE yog corrosion resistant thiab tsis hnov ​​​​mob nrog feem ntau cov kuab tshuaj thiab yog li tsis leach hlau ions rau hauv da dej. Cov tshuaj neutrality ntawm cov cua sov saum npoo ua rau qhov tsis tu ncua ntawm cov tshuaj muaj pes tsawg leeg thiab kev ruaj ntseg ntawm cov txheej txheem hauv lub sijhawm. Nyob rau hauv cov ntaub ntawv ntawm high purity lag luam, qhov no feature yog feem ntau tseem ceeb tshaj tus nqi qub ntawm cov khoom siv.

Ntev- Tus Nqi Sij Hawm: nce - Tus Nqi Ua Ntej vs. Kev Ua Haujlwm Kev Muaj Peev Xwm
Stainless hlau cua sov daim hlau ua rau lub tswv yim zoo thawj zaug thiab zoo li pheej yig dua. Cov khoom siv yog pheej yig dua thiab cov qauv yooj yim dua. Rau cov dej los yog cov tshuaj corrosive me ntsis, stainless hlau tuaj yeem siv rau lub sijhawm ntev nrog me me lossis tsis muaj degradation.

Tab sis tus nqi kwv yees sib txawv hauv cov tshuaj lom neeg hnyav. Corroded cua sov daim hlau yuav tsum tau kho tsis tu ncua, uas sawv cev rau cov khoom siv thiab downtime. Txhua zaus, lub kaw lus yuav tsum raug kaw, cov tshuaj da dej tshem tawm, lub phaj cua sov tshiab tau teeb tsa thiab sim ua ntej kev tsim khoom tuaj yeem pib dua. Thaum lub sij hawm, xws li kev cuam tshuam tuaj yeem raug nqi ntau dua li cov khoom siv thawj zaug.

PTFE cua sov daim hlau feem ntau kim dua pib tab sis deb dua resistant nyob rau hauv acidic tej yam kev mob. Qhov saum npoo yuav tsis corrode ncua lub voj voog hloov thiab txo qhov tsim nyog rau kev saib xyuas. Cov nqi zais ntawm cov hlau tsis yog tsuas yog hloov pauv xwb, tab sis kev phom sij ntawm kev sib kis, txheej txheem tsis ruaj khov thiab lub sijhawm tsis tau npaj tseg. Thaum cov ntsiab lus no raug coj mus rau hauv tus account, PTFE feem ntau yog qhov kev xaiv pheej yig dua nyob rau lub sijhawm ntev.

Kev xaiv cov khoom siv thiab ntsuas kub
Lwm qhov piv txwv tseem ceeb nrog PTFE thiab stainless hlau cua sov daim hlau yog qhov ntsuas kub. Stainless hlau tuaj yeem tiv taus qhov kub thiab txias ntau dua thiab cov neeg kho tshuab kev ntxhov siab, yog li nws yog qhov tsim nyog rau kev siv hluav taws xob kub kub.

PTFE, txawm li cas los xij, feem ntau ua haujlwm ruaj ntseg hauv thaj tsam ntawm 200-230 degree. Qhov ntsuas kub no ntau tshaj li qhov txaus rau feem ntau cov txheej txheem tshuaj xws li plating da dej, kua qaub ntxuav tank thiab cov tshuaj cia cua sov. Nyob rau hauv cov ntaub ntawv no, qhov zoo dua corrosion kuj ntawm PTFE tshaj lub siab kub muaj peev xwm ntawm stainless hlau.

Xaiv cov khoom tsim nyog rau Chemical Ib puag ncig
Thaum kawg, qhov kev txiav txim siab ntawm PTFE thiab stainless hlau cua sov daim hlau yog nyob ntawm cov tshuaj ib puag ncig uas yuav siv cov khoom siv. Stainless hlau tseem yog ib qho tseem ceeb thiab raug nqi kev xaiv nyob rau hauv tsis corrosive ib puag ncig xws li dej cua sov los yog me me alkaline daws. Nws muaj zog, ua kom sov zoo thiab pheej yig dua pib ua rau nws tsim nyog rau ntau yam kev lag luam.

Nyob rau hauv sib piv, hnyav acids, chloride muaj cov kev daws teeb meem thiab siab purity tshuaj txheej txheem yuav tsum tau ntau dua cov qauv ntawm cov khoom stability. Hauv cov chaw no, qhov tsis muaj zog ntawm PTFE yog qhov txiaj ntsig sib txawv. Cov khoom siv yog corrosion-resistant thiab tsis tso cov hlau ions thiab muaj kev ua haujlwm ruaj khov rau lub sijhawm ua haujlwm ntev.

Tom qab ntawd qhov kev xaiv tsis yog ib qho teeb meem ntawm cov khoom siv xwb. Nws yog hais txog kev sib piv cov ntaub ntawv rau chemistry. Txawm hais tias PTFE yog kim dua, nws qhov kev ntseeg tau ntev ntev hauv cov da dej hnyav acid thiab nws cov kev tiv thaiv tsis zoo ua rau nws tsim nyog tus nqi. Rau cov xwm txheej tsawg dua, cov hlau tsis muaj steel tseem yog qhov ua tau thiab kev daws teeb meem. Lub tswv yim tseem ceeb ntawm kev xaiv cov ntaub ntawv raws li cov khoom siv tshuaj lom neeg yog qhov tseem ceeb rau cov txheej txheem cua sov ua haujlwm tau zoo.