Yuav ua li cas kom tsis txhob muaj cov khoom siv los ntawm cov khoom siv muaj zog corrosive nruab nrab, kom txo tau cov cuab yeej siv peev thiab cov nqi kho mob thiab txhim kho kev tsim khoom thiab cov txiaj ntsig yog qhov teeb meem nyuaj uas txhua lub tuam txhab tshuaj yuav tsum tau daws mus ib txhis. Ntau yam khoom muaj kev tiv thaiv corrosion tab sis tsis kub kub tsis kam, thaum flake graphite muaj ob qho zoo. Cov nram qab no FuruiteGraphiteqhia txog kev nthuav dav li cas flake graphite tuaj yeem daws qhov teeb meem corrosion ntawm cov khoom siv:
1. Cov thermal conductivity zoo heev.Flake graphitekuj muaj cov thermal conductivity zoo, uas tsuas yog cov khoom siv tsis yog xim hlau uas muaj cov thermal conductivity ntau dua li cov hlau, nyob rau hauv qeb ntawm cov khoom tsis yog xim hlau. Lub thermal conductivity yog ob zaug ntawm carbon steel thiab xya npaug ntawm stainless hlau. Yog li ntawd, nws yog qhov tsim nyog rau cov khoom siv hluav taws xob hloov hluav taws xob.
2. Zoo heev corrosion kuj. Ntau hom carbon thiab graphite muaj kev tiv thaiv zoo heev rau tag nrho cov concentrations ntawm hydrochloric acid, phosphoric acid thiab hydrofluoric acid, nrog rau cov fluorine-muaj xov xwm, thiab qhov siab tshaj plaws ntawm daim ntawv thov kub yog 350 ℃ -400 ℃, uas yog, qhov kub ntawm carbon thiab graphite pib oxidize.
3, resistant rau tej yam kub kub. Kev siv kub ntawm flake graphite nyob ntawm ntau yam khoom siv impregnating. Piv txwv li, phenolic impregnated graphite tuaj yeem tiv taus 170-200 ℃, thiab yog tias muaj tus nqi ntawm silicone resin impregnated graphite ntxiv, nws tuaj yeem tiv taus 350 ℃. Thaum phosphoric acid tso rau ntawm carbon thiab graphite, oxidation tsis kam ntawm carbon thiab graphite tuaj yeem txhim kho, thiab qhov ua haujlwm kub tuaj yeem nce ntxiv.
4, qhov saum npoo tsis yooj yim rau cov qauv. Qhov "affinity" ntawm flake graphite thiab cov xov xwm feem ntau yog me me, yog li av tsis yooj yim rau kev ua raws li qhov chaw. Tshwj xeeb tshaj yog siv hauv cov khoom siv condensation thiab cov khoom siv crystallization.
Nws tuaj yeem pom tau tias cov khoom siv nrog flake graphite muaj kev tiv thaiv corrosion zoo heev thiab lub cev thiab lub zog, thiab tuaj yeem siv los tsim cov khoom siv los tiv thaiv corrosion thiab dav dav hauv kev lag luam tshuaj.
Post lub sij hawm: May-15-2023