Dab tsi yog plaub pawg ntawmstainless hlau bolts?
1. Teflon
Lub npe lag luam ntawm PTFE yog "Teflon", yooj yim PTFE lossis F4, feem ntau hu ua huab tais ntawm plastics.Nws yog ib qho ntawm cov khoom siv corrosion-resistant tshaj plaws nyob rau hauv lub ntiaj teb niaj hnub no.Nws yog siv los tsim cov kav dej ua kua roj, cov khoom siv hluav taws xob thiab lwm yam khoom siv sib txuas.Qhov zoo tshaj plaws sealing khoom.
Tetrafluoroethylene yog ib qho zoo tshaj plaws corrosion kuj cov ntaub ntawv nyob rau hauv lub ntiaj teb no niaj hnub no, yog li nws muaj lub koob npe nrov ntawm "Plastic King".Nws tuaj yeem siv rau hauv txhua hom tshuaj nruab nrab rau lub sijhawm ntev, thiab nws cov khoom tsim tau daws ntau yam teeb meem hauv kuv lub teb chaws cov tshuaj, roj av, tshuaj thiab lwm yam.Teflon seals, gaskets, gaskets.Polytetrafluoroethylene seals, gaskets, thiab sealing gaskets yog ua los ntawm kev ncua polymerized polytetrafluoroethylene resin.Piv nrog rau lwm cov yas, PTFE muaj cov yam ntxwv ntawm cov tshuaj tiv thaiv zoo heev thiab kub tsis kam.Nws tau dav siv los ua cov khoom sib khi thiab cov khoom ntim.
Nws yog ib qho polymer compound tsim los ntawm polymerization ntawm tetrafluoroethylene.Nws muaj kev ruaj ntseg zoo heev, corrosion kuj, airtightness, siab lubrication, non-stickiness, hluav taws xob rwb thaiv tsev thiab zoo tiv thaiv kev laus.Nws tuaj yeem ua haujlwm ntev ntawm qhov kub ntawm +250℃rau -180℃.Tsuas yog molten hlau sodium thiab kua fluorine, nws tuaj yeem tiv taus txhua yam tshuaj.Nws yuav tsis hloov thaum boiled hauv aqua regia.
Tam sim no, txhua yam khoom ntawm PTFE tau ua lub luag haujlwm tseem ceeb hauv kev lag luam hauv lub tebchaws xws li kev lag luam tshuaj lom neeg, tshuab, hluav taws xob, khoom siv hluav taws xob, kev lag luam tub rog, aerospace, kev tiv thaiv ib puag ncig thiab txuas hniav.stainless hlau ntsia hlau
2. Carbon fiber ntau
Cov pa roj carbon fiber ntau yog cov khoom siv fiber ntau nrog cov ntsiab lus carbon ntau dua 90%.C / C cov khoom sib xyaw ua ke ntawm nws thiab cov resin yog ib qho ntawm cov khoom siv corrosion-resistant tshaj plaws.
Cov pa roj carbon fiber ntau yog ib hom tshiab ntawm lub zog siab, siab-modulus fiber ntau nrog cov ntsiab lus carbon ntau dua 95%.Nws yog cov khoom siv microcrystalline graphite uas tau txais los ntawm piling flake graphite microcrystals thiab lwm cov organic fibers raws cov fiber ntau axial kev taw qhia, thiab kev kho carbonization thiab graphitization.Cov pa roj carbon fiber yog "hloov rau sab nraud thiab nruj rau sab hauv".Nws qhov zoo yog sib zog dua li ntawm cov hlau txhuas, tab sis nws lub zog siab dua li cov hlau.Nws kuj muaj cov yam ntxwv ntawm corrosion kuj thiab siab modulus.Nws yog cov khoom siv tseem ceeb hauv kev tiv thaiv hauv tebchaws, kev ua tub rog thiab kev siv pej xeem.Nws tsis tsuas yog muaj cov yam ntxwv ntawm cov khoom siv carbon, tab sis kuj muaj cov txheej txheem mos ntawm textile fibers.Nws yog ib tiam tshiab ntawm kev txhawb nqa fibers.
Cov pa roj carbon fiber ntau muaj cov khoom zoo heev.Cov pa roj carbon fiber ntau muaj zog axial thiab modulus, tsis tshua muaj ceev, siab tshwj xeeb kev ua tau zoo, tsis muaj creep, ultra-siab kub kuj nyob rau hauv ib tug uas tsis yog-oxidizing ib puag ncig, zoo qaug zog tsis kam, thiab nws tshwj xeeb kub thiab hluav taws xob conductivity yog nruab nrab ntawm non-metallic thiab non- nws yog xim hlau.Ntawm cov hlau, cov coefficient ntawm thermal expansion yog me me thiab anisotropic, corrosion kuj zoo, thiab X-ray kis tau zoo.Zoo hluav taws xob thiab thermal conductivity, zoo electromagnetic shielding, thiab lwm yam.
Piv nrog rau cov iav fiber ntau, Cov Hluas cov qauv ntawm cov pa roj carbon fiber ntau yog ntau dua 3 zaug;piv nrog Kevlar fiber ntau, cov Young's modulus yog li 2 zaug, thiab nws tsis o los yog o ntawm cov organic solvents, acids, thiab alkalis.Zoo corrosion kuj.
3. tooj liab oxide
Tooj oxide tam sim no yog cov khoom siv corrosion-resistant tshaj plaws.Sweden yeej ib txwm ua tus thawj coj hauv ntiaj teb hauv kev pov tseg nuclear.Tam sim no lub teb chaws's cov kws tshaj lij tau siv lub thawv tshiab ua los ntawm tooj liab oxide los khaws cov khib nyiab nuclear, uas tuaj yeem lav kev ruaj ntseg cia rau 100,000 xyoo.
Copper oxide yog dub oxide ntawm tooj liab, me ntsis amphiphilic thiab me ntsis hygroscopic.Tus txheeb ze molecular loj yog 79.545, qhov ceev yog 6.3 ~ 6.9 g / cm3, thiab lub melting point yog 1326℃.Nws yog insoluble nyob rau hauv dej thiab ethanol, soluble nyob rau hauv acid, ammonium chloride thiab potassium cyanide tov.Nws yaj maj mam hauv cov tshuaj ammonia thiab tuaj yeem ua rau muaj zog alkali.Copper oxide feem ntau yog siv los ua rayon, ceramics, glazes thiab enamels, roj teeb, roj av desulfurizers, tshuaj tua kab, thiab tseem rau hydrogen ntau lawm, catalysts, thiab iav ntsuab.
4. platinum
Platinum yog tshuaj ruaj khov thiab tsis cuam tshuam nrog hydrochloric acid, nitric acid, sulfuric acid thiab organic acids ntawm chav tsev kub.Nws yog hu ua "feem ntau corrosion-resistant hlau", tab sis nws yog soluble nyob rau hauv aqua regia.Titanium yog ib qho yooj yim los tsim cov yeeb yaj kiab ruaj khov ntawm titanium oxide, yog li lub titanium txias raj yog suav tias yog tsis muaj corrosion thiab yaig.
Platinum yog ib txwm tshwm sim dawb muaj nuj nqis hlau.Platinum flashed lub teeb ci ntsa iab hauv keeb kwm ntawm tib neeg kev vam meej thaum ntxov li 700 BC.Nyob rau hauv ntau tshaj 2,000 xyoo ntawm tib neeg siv platinum, nws yeej ib txwm raug suav hais tias yog ib qho ntawm cov khoom muaj nqis tshaj plaws.
Qhov xwm ntawm platinum yog ruaj khov heev, nws yuav tsis deteriorate los yog ploj mus vim niaj hnub hnav, thiab nws cov luster yog ib txwm zoo ib yam.Txawm hais tias nws los rau hauv kev sib cuag nrog cov tshuaj acidic hauv lub neej, xws li sulfur hauv cov dej kub, tshuaj dawb, tshuaj chlorine hauv cov pas dej da dej, lossis hws, nws yuav tsis cuam tshuam, yog li koj tuaj yeem hnav platinum hniav nyiaj hniav kub nrog kev ntseeg siab txhua lub sijhawm.Tsis muaj teeb meem ntev npaum li cas nws hnav, platinum yeej ib txwm tuav nws lub ntuj ntshiab dawb luster thiab yuav tsis ploj mus.
Post lub sij hawm: Sep-24-2021