Muaj ntau ntau yam ntawm corrosion-resistant cov ntaub ntawv, tab sis yog dab tsi yog cov feem ntau corrosive-resistant ntaub ntawv? Cov nram qab no yuav tsum yog ib tug neeg pej xeem nrog cov kev taw qhia rau lub ntiaj teb no plaub corrosion-resistant ntawv uas siv:
1. Teflon
Teflon khoom npe hu ua "Teflon" (Teflon, mob khaub thuas nyob rau hauv), Jane PTEE los yog F4, feem ntau hu ua yas King, yog lub ntiaj teb no lub feem ntau corrosion-resistant ntaub ntawv ntawm alum, yog ib tug ntawm zus tau tej cov kua roj pipelines, Thaum tshav kub kub exchangers thiab lwm yam ntsiab lus khoom, lub tagnrho sealing cov ntaub ntawv kev twb kev txuas.
Tetrafluoroethylene [PTFE, F4] yog ib tug ntawm qhov zoo tshaj plaws corrosion-resistant ntaub ntawv nyob rau hauv lub ntiaj teb no niaj hnub no, li ntawd, lub "yas huab tais" yog laudatory. Nws yuav siv tau nyob rau hauv ib yam ntawm cov tshuaj nruab nrab rau ib ntev lub sij hawm, nws tau solved teeb meem ntau nyob rau hauv lub teb ntawm cov tshuaj kev lag luam, roj av, khw muag tshuaj thiab thiaj li nyob. PTFE cov ntsaws ruaj ruaj, txuas, gaskets. PTFE cov ntsaws ruaj ruaj, gaskets, kev sib khi gaskets raug xaiv raug muab tshem tawm polymerization PTFE cob molding ua. Piv nrog rau lwm yas, PTFE muaj zoo heev tshuaj lom neeg kuj thiab kub kuj, nws tau lug siv raws li kev sib khi cov ntaub ntawv thiab muab tub lim cov ntaub ntawv uas.
Nws yog ib tug macromolecule polymer tsim los ntawm tetrafluoroethylene, nrog zoo heev tshuaj stability, corrosion kuj, kev sib khi, siab lubrication, hluav taws xob rwb thaiv tsev thiab zoo anti-laus endurance. yuav ua tau ntawm + 250 ℃ to-180 ℃ kub rau ib tug ntev-lub sij hawm ua hauj lwm, nyob rau hauv tas li ntawd mus molten hlau sodium thiab kua fluorine, muaj peev xwm ntawm tag nrho cov lwm yam tshuaj, nyob rau hauv lub aqua Regia kub kuj tsis hloov.
Tam sim no, tag nrho cov hom ntawm PTFE cov khoom uas muaj lawm nyob rau hauv cov tshuaj kev lag luam, machinery, electronics, hluav taws xob khoom siv, cov tub rog, aerospace, tej kev tiv thaiv thiab kev txuas hniav thiab lwm yam liaj teb ntawm lub teb chaws kev khwv nyiaj txiag ua si ib pivotal luag hauj lwm.
2. Carbon fiber
Carbon fiber ntau yog ib tug fibrous carbon khoom uas muaj ntau tshaj li 90% cov pa roj carbon cov ntsiab lus, thiab nws yog ib qho ntawm feem corrosive-resistant cov ntaub ntawv.
Carbon fiber (carbon fiber, abbreviated CF) yog ib tug tshiab fiber khoom uas muaj siab muaj zog thiab modulus fibers nrog carbon ntsiab lus tshaj 95 %%. Nws yog ua los ntawm flake graphite microcrystalline thiab lwm yam organic fibers raws cov kev taw qhia ntawm cov axial pawg ntawm fiber, carbide thiab graphite ua ntawm microcrystalline number case. Carbon fiber "velvet hnab looj tes", qhov zoo tshaj yog sib zog tshaj txhuas, tab sis lub dag lub zog yog siab tshaj hlau, thiab muaj xeb kuj, siab modulus yam ntxwv, txoj kev tiv thaiv kev lag luam thiab civil sib nrauj yog ib qho tseem ceeb cov ntaub ntawv. Nws tsuas tsis muaj cov intrinsic cov yam ntxwv ntawm cov pa roj carbon khoom, tab sis kuj muaj lub softness thiab machinability ntawm textile fibers, uas yog ib tug tshiab tiam ntawm tam fibers.
Carbon fibers muaj ntau zoo heev zog, thiab lub axial zog thiab modulus ntawm carbon fibers muaj, tsis tshua muaj ceev, muaj kev kawm siab, tsis muaj creep, uas tsis yog-oxidizing ib puag ncig, high-kub kuj, zoo nkees kuj, Thaum tshav kub kub thiab conductivity ntawm uas tsis yog-yog xim hlau thiab hlau, thermal expansion coefficient yog me me thiab lub anisotropy, zoo xeb kuj, X-ray transmittance yog zoo. Zoo conductive tshav kub conduction kev kawm, electromagnetic shielding thiab thiaj li nyob.
Piv nrog cov tus tsoos iav fiber, tus hluas tus modulus yog 3 lub sij hawm lub sij hawm ntau tshaj li hais tias ntawm lub fiber. Piv nrog rau Kevlar fibers, Young modulus yog hais txog ob zaug rau lub sij hawm, nyob rau hauv cov organic solvents, acids, alkali insoluble, corrosion kuj tseem ceeb.
III. Tooj oxide
Tooj oxide yog tam sim no lub feem ntau corrosion resistant khoom. Sweden tau ib tug thawj coj ntiaj teb nyob rau hauv lub teb ntawm nuclear pov tseg pov tseg, thiab lub teb chaws lub technicians yog tam sim no siv ib yam tshiab ntawm tooj liab-oxide ntim rau cia nuclear twj, uas yuav tau lees tias muaj kev nyab xeeb cia rau 100,000 xyoo.
Tooj oxide (CuO) yog ib tug tooj liab dub oxide, me ntsis ntau bisexual, me ntsis hygroscopic. Tus txheeb ze molecular loj yog 79,545, lub ceev 6.3 ~ 6.9 g / cm3, lub melting point yog 1326 ℃. Insoluble nyob rau hauv dej thiab ethanol, soluble nyob rau hauv acid, ammonium tshuaj dawb thiab poov tshuaj cyanide tshuaj, ammonia tshuaj maj mam yaj, yuav hnov mob nrog muaj zog alkali. Tooj oxide yog tsuas yog siv nyob rau hauv rayon, ceramics, glaze thiab enamel, roj teeb, cov roj av desulfurizer, tshuaj tua kab, kuj yog rau hydrogen, catalysts, ntsuab iav thiab thiaj li nyob.
IV. Platinum
Platinum cuab yeej yog ruaj khov, nyob ambient kub tsis nrog hydrochloric acid, nitric acid, sulfuric acid thiab organic acids, muaj yog "cov feem ntau corrosion-resistant co" Qhov no yog hu ua, tab sis yaj nyob rau hauv aqua regia. Titanium yog xav tau uas tsis yog-corrosive thiab tej qhov nqaij vim hais tias nws yog ib qho yooj yim mus tsim ib tug ruaj khov titanium oxide (TiO2) tiv thaiv zaj duab xis.
Platinum (Platinum, tsiaj ntawv PT), yog ib tug lawm tsim dawb precious hlau. Platinum, thaum ntxov nyob rau hauv lub 700 nyob rau hauv lub keeb kwm ntawm tib neeg kev vam meej, flashing dazzling teeb nyob rau hauv lub siv pej xeem ntawm platinum ntau tshaj 2000 xyoo ntawm keeb kwm, nws tau raug pom tias yog ib ntawm cov feem ntau noble hlau.
Cov khoom ntawm platinum yog heev ruaj khov, thiab yuav tsis deteriorate los yog ploj vim hais tias ntawm txhua txhua hnub coj, thiab nws ci yog ib txwm zoo li qub. Txawm muaj ntau acidic tshuaj nyob rau hauv lub neej, xws li tus kub springs ntawm cov leej faj, bleach, tshuaj chlorine ua nyob rau hauv lub pas dej ua ke, los yog tawm hws, thiab lwm yam, yuav tsis tsum cuam tshuam, yog li yuav ua tau nyob rau txhua lub sij hawm heev reassuring hnav platinum hniav nyiaj hniav kub. Tsis muaj teeb meem ntev npaum li cas nws ris, platinum yuav nco ntsoov cia kom nws ntuj dawb ci thiab tsis ploj mus.
