Cov roj av thiab cov tshuaj lom neeg nyob hauv txoj haujlwm tseem ceeb hauv kev lag luam hauv tebchaws, thiab peb cov khoom ntsia hlau thiab cov khoom siv sib txuas ib yam, tseem tau txais cov cuab yeej tseem ceeb, kuj tseem tau txais ntau cov cuab yeej siv los ntawm tib neeg. Vim tias cov yam ntxwv nyuaj ntawm kev siv tshuaj lom thiab nce ntxiv rau kev tiv thaiv ib puag ncig, peb yuav tsum xaiv cov khoom siv tshuaj lom li cas? Yam dab tsi uas yuav tsum tau tsom mus rau thiab yog li ntawd yog vim li cas yog ib qho tseem ceeb tshwj xeeb.
Nco tseg 1: Corrosion Resistance qhov teeb meem
Corrosion ib txwm yog ib qho ntawm cov teeb meem kev teeb meem tshaj plaws ntawm cov khoom siv tshuaj lom neeg. Kev saib xyuas me ntsis tuaj yeem ua rau kev puas tsuaj rau cov khoom siv, thiab muaj mob hnyav, nws tuaj yeem ua rau xwm txheej lossis txawm tias muaj kev puas tsuaj. Raws li kev txheeb cais, txog 60% ntawm kev puas tsuaj rau cov tshuaj chemical yog tshwm sim los ntawm kev tsim kho corrosion, yog li kev xaiv kev tshawb fawb yuav tsum yog ua thawj zaug kom them sai sai rau thaum xaiv tshuaj lom. Muaj feem ntau tsis to taub hais tias stainless hlau yog "cov khoom siv rau txhua yam uas tuaj yeem siv rau hauv txhua yam kev mob nruab nrab lossis ib puag ncig, uas yog qhov txaus ntshai heev.
Hauv qab no yog qee cov ntsiab lus tseem ceeb rau kev xaiv cov ntaub ntawv rau cov khoom siv tshuaj feem ntau:
1. Sulfuric acid
Raws li ib qho ntawm cov corrosive corrosive media, sulfuric acid yog ib qho tseem ceeb muaj cov khoom siv muaj nyob hauv ntau cov ntawv thov.
Kev xeb ntawm cov ntaub ntawv sib txawv heev nrog cov sib txawv thiab qhov kub ntawm sulfuric acid. Rau concentrated sulfuric acid nrog ib qho kev pom zoo saum toj 80% thiab qhov kub thiab cov hlau ceev cov khoom siv roj av thiab cov khoom siv rau cov twj thiab li qub; Cov hlau zoo tib yam xws li 304 (0cr18ni9) thiab 316 (0cr18ni)
Yog li ntawd, twj thiab li qub rau kev thauj cov sulfuric acid feem ntau yog ua los ntawm cov hlau siab (tsis yooj yim
Fluoroplastic alloy tau pom zoo rau cov sulfuric acid, thiab tam sim no tsis muaj tshuaj lom neeg twg uas tuaj yeem hnov mob nrog nws. Yog li ntawd, siv cov kua roj fluorine (F46) yog kev xaiv ntau dua.
2. Hydrochloric acid
Feem ntau ntawm cov ntaub ntawv hlau tsis tiv thaiv hydrochloric acid acid corrosion (suav nrog ntau silicon hlau muaj peev xwm tsuas yog siv rau hydrochloric acid hauv caug 50℃thiab 30%. Tsis zoo li cov ntaub ntawv me me, feem ntau ntawm cov ntaub ntawv tsis zoo rau cov khoom siv tshuab hluav taws xob, thiab cov roj hmab zoo nkauj rau thauj hydrochloric acid.
3. Nitric acid
Feem ntau cov hlau yog cov corroded sai thiab pov tseg hauv nitric acid, thiab stainless hlau yog qhov feem ntau siv nitric acid resistant cov khoom. Nws muaj cov zoo corrosion tsis kam rau txhua qhov siab ntawm nitric acid ntawm chav tsev kub. Nws yog tsim nyog teev tias molybdenum muaj cov hlau stainless (xws li 316, 316L) tsis yog tsis muaj kev ua zoo tib yam stainless hlau (xws li qee zaum txawm tias tsis muaj dua. Rau siab {- kub nitric acid, fluoroplastic alloy cov ntaub ntawv feem ntau yog siv.
4. Acetic Acid
Nws yog ib qho ntawm cov tshuaj corrosive feem ntau hauv cov organic acids. Zoo tib yam hlau yuav corrode loj hauv acetic acid ntawm txhua qhov kev xav thiab kub. Stainless hlau yog cov khoom siv zoo heev rau acetic acid, thiab 316 stainless acid, thiab 316 stainless muaj molybdenum tseem siv tau rau cov ntshav siab thiab dilute acetic acid vapor.
Rau qhov kub thiab txias thiab siab acetic acid los yog lwm yam kev xav tau xeb nrog cov qauv nruj me me, cov hmoov yeeb quav tshuaj muaj txiaj ntsig zoo. Xws li Cqb Sib Nqus twj thiab Cq Stainless Hlau Sib Nqus Twj.
5. Alkali (sodium hydroxide)
Feem ntau, cov corrosiveness tsis muaj zog heev, tab sis feem ntau cov kev daws teeb meem alkaline yuav ua cov muaju. Yog li ntawd, FSB hom fluorine alkali twj nrog cov tshuab ntim tshuab ua los ntawm cov khoom ua si siliconized graphite 169 cov khoom siv tau raug xaiv.
6. Ammonia (ammonia hydroxide)
Feem ntau cov hlau thiab tsis muaj hlau muaj me me corrosion hauv kua ammonia thiab ammonia hydroxide), tsuas tooj liab thiab tooj liab alloys tsis haum rau kev siv. Nyob rau lub sijhawm no, nws yog qhov zoo dua los xaiv Cqf engineering Yas Sib Nqus twj thiab FSB fluorine alloy centrifugal twj tso kua mis.
7. Seem dej (Seasater)
Tus hlau zoo tib yam muaj tus nqi qis dua hauv cov tshuaj hauv sodium tshuaj, dej hiav txwv, thiab cov dej qab ntsev, thiab feem ntau yuav tsum tau tiv thaiv txheej; Ntau hom stainless hlau kuj muaj cov nqi sib xyaw tsawg, tab sis yuav ua rau muaj kev xeb hauv cheeb tsam vim tias cov hlau tsis muaj feem ntau nyiam.
8. Cawv, Ketones, Esters, Kev Txawj
Cov pa cawv ib txwm muaj xws li methanol, ethanous glycol, ether ethane, etc ether ether ether, etac ether, etac ether, etc. Lawv feem ntau tsis yog siv ntau yam, yog li zoo tib yam stainless hlau siv tau. Thaum xaiv, kev xaiv tsim nyog yuav tsum tau ua raws li cov khoom thiab cov kev xav tau ntawm nruab nrab.
Ib qho ntxiv, nws yog tsim nyog sau cia tias ketones, esters, thiab kev tsim kho muaj solubility hauv ntau hom roj hmab, yog li cov kev ua yuam kev yuav tsum zam thaum xaiv cov ntaub ntawv seeding. Qhia xaiv ib qho inorganic lub fluoropoplastic sib nqus twj tso kua mis.
Muaj ntau ntau lwm yam xov xwm uas tsis tuaj yeem qhia ntawm no ib qho los ntawm ib qho. Hauv ntej, thaum xaiv cov ntaub ntawv, ib qho yuav tsum tsis yog kev lam ua lossis dig muag, thiab yuav tsum tau tham txog cov khoom siv uas tsim nyog lossis kev coj ua.
NCO 2: Qhov Teeb Meem
Kev pub dawb yog txoj kev nyob mus ib txhis kev siv tshuaj lom neeg siv tshuaj, thiab nws yog qhov xav tau no tau ua rau muaj kev nce qib ntawm cov twj sib nqus.
Txawm li cas los xij, tseem muaj txoj hauv kev ntev mus ua tiav qhov xoom muag khoom noj cov tes tsho me me, muaj teeb meem corrosion, thiab lwm yam.
Nov yog qee cov ntsiab lus tseem ceeb txog kev khi lus:
1. Sealing Form
Rau cov ntsaws ruaj ruaj, feem ntau tsuas yog ob daim ntawv: gaskets thiab cov ntsaws ruaj ruaj, nrog o {{rings yog qhov feem ntau dav siv.
Rau cov ntsaws ruaj ruaj, tshuaj chem twj tsis tshua muaj siv cov ntsaws ruaj ruaj, feem ntau cov ntsaws ruaj ruaj. Cov ntsaws ruaj ruaj yog muab faib ua ib qho kawg thiab ob chav kawg, ntsuas thiab tsis sib xws. Hom sib npaug yog tsim nyog rau kev sib khi siab siab- siab crychures ntau dua 1.0 4}, particle, thiab lom volatile media. Ob chav kawg kawg Foob yuav tsum muaj cov kua cais ua kua rau hauv chav sib khi, thiab nws lub siab yog feem ntau 0.0-0.1 mpa ntau dua qhov nruab nrab siab.
2. Sealing Khoom
Cov khoom siv rau lub twj tso tshuaj zoo li qub ntawm cov tshuaj sib nqus uas muaj fluororubber, thiab polytetrafluoroethylene cov khoom tsuas yog siv nyob rau hauv cov xwm txheej tshwj xeeb; Cov khoom tsim ntawm cov qauv hloov kho thiab zoo li qub ntawm cov tshuab ntsaws ruaj ruaj yog qhov tseem ceeb, thiab nws tsis tas ua qhov kev xaiv zoo tshaj plaws rau kev nyuaj alloys. Tus nqi siab yog ib qho, thiab tsis muaj qhov nyuaj txawv ntawm ob yog tsis tsim nyog. Yog li ntawd, nws yog qhov zoo tshaj plaws los kho lawv txawv raws li cov yam ntxwv ntawm nruab nrab.
(Ceeb Toom: Miskas Cov Khoom Siv Hluav Taws Xob Api 610 yim kho cov ncauj lus kom ntxaws ntawm cov neeg siv tshuab cov khoom siv tshuab
NCO 3: Viscosity
Lub viscosity ntawm nruab nrab muaj qhov cuam tshuam tseem ceeb ntawm kev ua haujlwm ntawm lub twj tso kua mis. Raws li cov kab viscosity nce, lub taub hau lub taub hau nkhaus txo, thiab kev ua haujlwm zoo tshaj plaws lub taub hau thiab txaus nce, ua rau muaj kev txo qis hauv kev ua tau zoo.
Cov tsis muaj ntawm cov qauv dav dav yog qhov ua tau zoo thaum thauj dej huv, thiab yuav tsum hloov pauv thaum thauj cov xov xwm viscous.
Rau kev thauj mus los ntawm cov siab viscosity slurries, pastes, thiab kua dej viscous, nws raug pom zoo kom siv cov tshuaj cug nqus twj.