Yuav ua li cas hloov cov qauv yuav tshwm sim rau PTFE-coated fiberglass ntaub nyob rau hauv chemically corrosive ib puag ncig?

PTFE-coated fiberglass npuag yog cov khoom sib xyaw ua los ntawm impregnating fiberglass daim ntaub nrog polytetrafluoroethylene (PTFE) dispersion thiab ces sintering ntawm kub. Nws cov qauv tuaj yeem muab faib ua ob ntu: PTFE txheej thiab fiberglass puag ntaub.

 

Nyob rau hauv chemically corrosive ib puag ncig, cov qauv kev hloov pauv nyob ntawm seb hom, concentration, thiab kub ntawm qhov nruab nrab corrosive, nrog rau seb nws feem ntau tawm tsam cov txheej los yog lub substrate. Cia peb tshuaj xyuas cov txheej txheem no los ntawm txheej los ntawm kev xaav ntawm PTFE-coated fiberglass npuag manufacturers:

 

I. Hloov ntawm PTFE Txheej: Tsis tshua muaj kev ruaj khov nyob rau hauv Feem ntau ntawm cov rooj plaub

 

PTFE yog lub npe hu ua 'King of Plastics' vim nws muaj zog heev carbon-fluorine bonds thiab tshwj xeeb tshaj yog muaj zog inertness. Nyob rau hauv ib puag ncig chemically corrosive (xws li boiling aqua regia, concentrated sulfuric acid, concentrated nitric acid, organic solvents, thiab lwm yam), nws molecular saw qauv undergoes zoo tsis muaj tshuaj hloov. Txawm li cas los xij, nyob rau hauv cov xwm txheej hauv qab no, cov qauv yuav raug puas tsuaj:

 

1. Molten Alkali Metals / Strong Alkaline Solutions (xws li sodium, potassium, sodium hydroxide ntawm qhov kub thiab txias)

 

- Cov Qauv Hloov: Alkali hlau yuav rho tawm cov fluorine atoms los ntawm PTFE, ua rau cov tshuaj tiv thaiv dehydrofluorination. Cov -CF₂- pawg hauv cov saw hlau molecular raug rhuav tshem, tsim carbon-carbon ob daim ntawv cog lus (-C = C-) thiab tom qab ntawd ua rau carbonization.

- Macroscopic Manifestation: Cov txheej hloov los ntawm mis nyuj dawb / translucent mus rau xim av los yog dub, poob yooj, ua nkig, thiab hmoov. Qhov no yog ib yam tshuaj degradation.

 

2. Muaj zog Fluorinating Agents thiab qee yam Halogenated Hydrocarbons (nyob rau hauv qhov kub thiab txias)

 

- Elemental fluorine (F₂), chlorine trifluoride (ClF₃), thiab cov neeg ua haujlwm zoo sib xws tuaj yeem rhuav tshem cov pa roj carbon-carbon qaum, ua rau cov txheej txheem decompose.

- Nyob rau hauv qhov kub thiab txias, qee qhov Freon-hom kuab tshuaj tuaj yeem ua rau PTFE o loj heev. Txawm hais tias cov tshuaj tiv thaiv tsis tas yuav tshwm sim, cov qauv ntawm lub cev raug kev txom nyem los ntawm kev txo qis crystallinity, ntim nthuav dav, thiab poob ntawm lub zog vim yog cov saw hlau molecular raug yuam sib nrug.

 

3. Muaj zog Oxidizing Acids ntawm qhov kub thiab txias

 

- Lub sijhawm ntev immersion nyob rau hauv fuming nitric acid los yog kub concentrated sulfuric acid yuav maj mam oxidize PTFE nto, qhia polar pawg xws li carbonyl thiab hydroxyl pawg, thiab ua kom lub zog nto. Txawm li cas los xij, qhov no tsis tshua pom muaj nyob rau hauv cov ntawv thov.

 

Cov ntsiab lus tseem ceeb: Rau feem coob ntawm cov tshuaj lom neeg, PTFE txheej nws tus kheej yog cov txheej txheem 'tsis hloov.' Txawm li cas los xij, qhov teeb meem feem ntau nyob rau hauv qhov tseeb tias nws tsis yog impermeable kiag li, nrog rau hauv nws lub cev morphology.

 

II. Kev hloov pauv hauv Fiberglass Base Fabric: Qhov Kev Txuas Tsis Zoo ntawm Cov Khoom Siv Tag Nrho

 

Cov khoom tseem ceeb ntawm fiberglass yog silicon dioxide (SiO₂) thiab qee cov hlau oxides. Thaum qhov no yog corroded, tag nrho cov qauv ntawm high-temperature ntaub yuav vau.

 

1. Kev Tawm Tsam Tuag Ntawm Hydrofluoric Acid (HF)

 

- Kev Hloov Cov Qauv: HF tau txais cov tshuaj tiv thaiv tshwj xeeb nrog SiO₂: SiO₂ + 4HF → SiF₄↑ + 2H₂O. Cov pob txha fiberglass ncaj qha yaj thiab ploj mus.

- Macroscopic Manifestation: Cov ntaub ntog sai sai poob lub zog, ua zoo li cov tawv nqaij mos nrog tsuas yog cov txheej seem, tearing yooj yim thaum rub, nrog loj-scale sib cais ntawm txheej thiab substrate. Qhov no yog qhov dreaded tshuaj corrosion rau iav-fiber-raws li cov ntaub ntawv. Tsuav yog muaj pinholes nyob rau hauv lub txheej los yog cov npoo, qhov kev puas tsuaj yog kev puas tsuaj.

 

2. Slow Etching los ntawm Strong Alkalis (tshwj xeeb yog kub concentrated alkalis)

 

- Cov Qauv Hloov: OH⁻ ions tawg cov siloxane bonds (-Si-O-Si-) hauv cov iav network, tsim cov silicates soluble. Fiber nto hloov los ntawm du mus rau ntxhib, nrog etching pits thiab kab nrib pleb tshwm, lub fiber txoj kab uas hla thinning, thiab nws thiaj li fracturing.

- Macroscopic Manifestation: Lub zog tsis tu ncua txo qis, cov ntaub yuav nkig, thiab thaum khoov, cov pob txha pob txha protrude los ntawm txheej, ua rau txheej txheej tawg thiab tev tawm.

 

3. Acid Media (tshwj tsis yog hydrofluoric acid)

 

- Kev Hloov Cov Qauv: Cov kua qaub ntau (hydrochloric acid, sulfuric acid, thiab lwm yam) nyiam tshaj tawm cov khoom tsis-silica (xws li txhuas, calcium oxides, thiab lwm yam) los ntawm fiberglass, tawm hauv feem ntau ntawm cov pob txha silica. Cov txheej txheem no feem ntau hu ua 'leaching,' tsim cov qauv microporous ntawm fiber ntau.

- Macroscopic Manifestation: Cov ntaub yuav nyuaj dua thiab nkig, nrog kev hloov pauv ntawm qhov shrinkage, txawm tias tag nrho daim ntawv tuaj yeem khaws cia. Lub zog txo qis vim kev ntxhov siab concentration.

 

III. Hloov ntawm Composite Interface: Hidden Failure

 

Chemical ib puag ncig feem ntau tsis tawm tsam lub taub hau tab sis es tsis txhob nkag los ntawm cov npoo los yog los ntawm micro-defects.

 

- Kev nkag mus thiab delamination: Cov kuab tshuaj organic lossis cov kua qaub nkag los ntawm cov pinholes, micro-cracks, los yog txiav cov npoo hauv PTFE txheej, tawm tsam cov fiberglass. Cov khoom siv tshuaj tiv thaiv lossis cov kua dej nkag mus rau ntawm qhov sib txuas, tsim cov osmotic siab, ua rau PTFE txheej rau blister thiab delaminate los ntawm fiberglass substrate rau ntawm qhov loj.

- Kev ntxhov siab Corrosion Cracking: Cov ntaub kub kub yog nyob rau hauv qhov nro thaum siv. Kev xeb ntawm cov fiberglass los ntawm cov tshuaj lom neeg (tshwj xeeb tshaj yog muaj zog alkalis) ua ke nrog cov neeg kho tshuab kev nyuaj siab, ua rau cov kab nrib pleb kom nrawm nrawm raws cov fiber ntau radial kev taw qhia, ua rau cov ntaub tawg tam sim ntawd nrog kev huv si-pob txha morphology thaum so.

 

Nyob rau hauv chemically corrosive ib puag ncig, cov kev hloov pauv ntawm PTFE-coated fiberglass npuag tuaj yeem ua tiav raws li: 'King of Plastics' txheej tseem yuav luag ruaj khov zoo li lub roob, thaum lub fiberglass puag ntaub - ib zaug nkag mus lossis tawm tsam - dhau los ua Achilles 'pob taws, ua rau cov pob txha tawg, tag nrho cov khoom sib tsoo, thiab kev sib tsoo ntawm lub hauv paus.

 

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Cov ntaub ntawv saum toj no yog muab los ntawm Jiangsu Aoke Tshiab Khoom Technology Co., Ltd.

 

Yog tias koj xav paub ntau ntxiv txog cov ncauj lus kom ntxaws, daim ntawv thov scenarios, thiab cov kev xaiv kho kom haum rau peb cov khoom lag luam tag nrho-xws li PTFE-coated fiberglass npuag, PTFE-coated fiberglass daim kab xev, PTFE-coated fiberglass mesh siv, adhesive-bonded seamless koj siv, ib leeg-sided PTFE npuag resistant, high-temperature resistant, high-temperature resistant. fiberglass ntaub - thov koj xav tiv tauj peb:

 

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