Yuav ua li cas kom tsis txhob muaj xeb ntawm cov khoom siv los ntawm cov khoom siv corrosive muaj zog, yog li kom txo cov cuab yeej siv peev thiab cov nqi txij nkawm thiab txhim kho kev tsim khoom thiab cov txiaj ntsig yog qhov teeb meem nyuaj uas txhua lub tuam txhab tshuaj lom neeg yuav tsum daws mus ib txhis. Ntau yam khoom muaj kev tiv thaiv corrosion tab sis tsis kub siab, thaum flake graphite muaj ob qho zoo. Cov Furuite hauv qab noCov xim avqhia txog kev piav qhia txog yuav ua li cas flake graphite tuaj yeem daws qhov teeb meem xeb ntawm cov khoom siv:
1. Kev ua tau zoo heev ntawm cov thermal conductivity.Cov nplai graphitekuj muaj kev ua tau zoo ntawm cov cua sov, uas yog tib yam khoom siv uas tsis yog hlau uas muaj kev ua tau zoo ntawm cov cua sov ntau dua li hlau, qeb duas thawj zaug ntawm cov khoom siv uas tsis yog hlau. Kev ua tau zoo ntawm cov cua sov yog ob npaug ntawm cov hlau carbon thiab xya npaug ntawm cov hlau tsis xeb. Yog li ntawd, nws tsim nyog rau cov khoom siv hloov pauv cua sov.
2. Kev tiv thaiv xeb zoo heev. Ntau hom carbon thiab graphite muaj kev tiv thaiv xeb zoo heev rau txhua qhov concentration ntawm hydrochloric acid, phosphoric acid thiab hydrofluoric acid, suav nrog cov xov xwm uas muaj fluorine, thiab qhov kub siab tshaj plaws ntawm daim ntawv thov yog 350 ℃ -400 ℃, uas yog, qhov kub uas carbon thiab graphite pib oxidize.
3, tiv taus qee qhov kub siab. Qhov kub siv 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 ntxiv cov silicone resin impregnated graphite kom raug, nws tuaj yeem tiv taus 350 ℃. Thaum phosphoric acid tso rau ntawm carbon thiab graphite, qhov tsis kam oxidation ntawm carbon thiab graphite tuaj yeem txhim kho, thiab qhov kub ua haujlwm tiag tiag tuaj yeem nce ntxiv.
4, qhov chaw tsis yooj yim rau kev teeb tsa. Qhov "affinity" ntawm flake graphite thiab feem ntau cov xov xwm yog me me heev, yog li av tsis yooj yim lo rau ntawm qhov chaw. Tshwj xeeb tshaj yog siv rau hauv cov khoom siv condensation thiab cov khoom siv crystallization.
Nws tuaj yeem pom tias cov khoom siv nrog flake graphite muaj kev tiv thaiv corrosion zoo heev thiab lub cev thiab cov khoom siv kho tshuab, thiab tuaj yeem siv los tsim cov khoom siv tiv thaiv corrosion thiab kis dav hauv kev lag luam tshuaj lom neeg.
Lub sijhawm tshaj tawm: Tsib Hlis-15-2023