Covntsev tsuag kuaj chamber(ntsev tshuaj tsuag tshuaj ntsuam tshuab) yog siv los simulate ntsev tsuag ib puag ncig tej yam kev mob thiab soj ntsuam cov corrosion kuj ntawm cov khoom uas muaj feem xyuam rau cov khoom los yog cov ntaub ntawv raws li cov corrosion ntawm cov qauv nyob rau hauv lub ntsev tsuag ib puag ncig. Nws yog ib qho ntawm "peb kev tiv thaiv" (tso cua sov, tshuaj tsuag ntsev, pwm) cov cuab yeej siv rau kev nyab xeeb kev nyab xeeb. Nws yog ib qho tseem ceeb ntawm cov cuab yeej xeem rau kev kawm txog kev hloov pauv thiab kev ntseeg siab ntawm ntau qhov chaw hauv tshuab, lub teeb muaj hluav taws xob, ntsuas ntsuas thiab lwm yam lag luam.
BOTO tau tsom mus rau kev tsim cov khoom siv ntsuas ib puag ncig rau ntau tshaj 20 xyoo, nrog kev txhim khu kev qha zoo, tus nqi zoo thiab xa khoom sai!
Ntsev tshuaj ntsuam chamber yog ib qho ntawm peb cov khoom tseem ceeb, nyem kom paub ntxiv! →Ntsev tshuaj ntsuam chamber cov ntsiab lus
Puas yog cov tshuaj tsuag ntsev siv cov dej ntsev zoo tib yam? Lub sij hawm ntau npaum li cas sib npaug rau 1 teev ntawm kev ntsuas ntsev tsuag hauv ib puag ncig ntuj?
Kev kuaj ntsev ntsev yog dab tsi?
Kev kuaj ntsev ntsev yog ib qho kev ntsuas kev tiv thaiv kev tiv thaiv kom nrawm rau cov khoom cua. Nws atomizes dej ntsev ntawm ib tug tej yam concentration thiab ces tsuag nws mus rau hauv ib tug kaw thermostatic chamber. Nws qhia txog kev tiv thaiv corrosion ntawm cov qauv kuaj los ntawm kev soj ntsuam cov kev hloov pauv ntawm cov qauv kuaj tom qab muab tso rau hauv lub chamber rau ib lub sijhawm. Nws yog ib qho kev xeem ceev. Raws li txoj kev no, ntsev concentration ntawm chloride nyob rau hauv cov ntsev tsuag ib puag ncig yog ob peb los yog kaum ob lub sij hawm ntawm cov ntsev ntsev nyob rau hauv ib puag ncig ntuj, uas zoo heev nce tus nqi corrosion. Kev ntsuas ntsev ntsev yog ua rau ntawm cov khoom, thiab lub sijhawm kom tau txais cov txiaj ntsig kuj tseem luv heev.
Lub hauv paus ntsiab lus ntawm ntsev tsuag corrosion
Feem ntau corrosion ntawm cov ntaub ntawv hlau tshwm sim nyob rau hauv atmospheric ib puag ncig, uas muaj corrosive Cheebtsam thiab yam xws li oxygen, av noo, kub hloov, thiab pa phem. Ntsev tshuaj tsuag corrosion yog ib qho tshwm sim thiab feem ntau puas atmospheric corrosion.
Kev xeb ntawm cov ntaub ntawv hlau los ntawm cov tshuaj tsuag ntsev feem ntau yog tshwm sim los ntawm cov tshuaj ntsev ntsev nkag mus rau hauv cov hlau thiab ua rau cov tshuaj tiv thaiv electrochemical, ua rau "tsis muaj peev xwm hlau-electrolyte tov-siab muaj peev xwm impurity" micro-battery system, hloov hluav taws xob tshwm sim, thiab cov hlau siv raws li cov anode dissolves. Cov tebchaw tshiab yog tsim uas yog corrosives. Lub luag haujlwm tseem ceeb hauv cov txheej txheem ntsev tsuag kev puas tsuaj yog chloride ions. Nws muaj peev xwm nkag mus tau yooj yim thiab tuaj yeem nkag mus rau cov hlau oxide txheej yooj yim thiab nkag mus rau sab hauv ntawm cov hlau, ua kom cov hlau tsis muaj zog. Nyob rau tib lub sijhawm, chloride ions muaj lub zog me me hydration. Nws yog yooj yim adsorbed ntawm cov hlau nto thiab hloov cov pa oxygen hauv txheej oxide uas tiv thaiv cov hlau, ua rau cov hlau puas.
Classification ntawm ntsev tsuag test
Kev ntsuam xyuas ntsev tsuag yog muab faib ua plaub hom: nruab nrab ntsev tsuag tshuaj ntsuam (NSS); acetic ntsev spray test (AASS); tooj liab ceev acetic ntsev tsuag tshuaj ntsuam (CASS); alternating ntsev tsuag test.
1. Neutral ntsev tsuag tshuaj ntsuam (NSS test) yog qhov ntxov tshaj plaws ceev ceev corrosion txoj kev nrog rau daim ntawv thov dav tshaj plaws. Nws siv 5% sodium chloride ntsev tov, thiab pH tus nqi ntawm cov tshuaj yog hloov mus rau qhov nruab nrab ntau yam (6 mus rau 7) raws li cov tshuaj txau. Qhov ntsuas kub yog tag nrho 35 degree, thiab cov sedimentation tus nqi ntawm ntsev tsuag yuav tsum nyob nruab nrab ntawm 1 ~ 2ml / 80cm².h.
Qhov nruab nrab ntsev tsuag tshuaj ntsuam yog tsim rau: hlau thiab lawv cov alloys, hlau coatings (anodic los yog cathodic), conversion coatings, anodic oxidation films, organic coatings ntawm hlau substrates.
2. Kev ntsuam xyuas acetic acid ntsev ntsev (AASS test) yog txhawm rau ntxiv qhov tsim nyog ntawm glacial acetic acid rau cov ntsev npaj los xyuas kom meej tias pH tus nqi ntawm cov kua sau hauv cov ntsev tsuag chamber yog 3.1 txog 3.3. Cov tshuaj ua acidic thiab qhov kawg ntsev tsuag yog tsim. ua acidic. Nws tus nqi corrosion yog kwv yees li 3 npaug sai dua qhov kev sim NSS. Yog tias tus nqi pH ntawm cov tshuaj npaj tau pib yog 3. Tus nqi pH yuav tsum ntsuas nrog acidimeter ntawm 25 degree ± 2 degree. Precision pH daim ntawv xeem nrog qhov ntsuas qhov tseeb tsis pub ntau tshaj 0.1 tuaj yeem siv rau kev ntsuas txhua hnub. Tus nqi pH ntawm cov tshuaj tuaj yeem hloov kho nrog glacial acetic acid lossis sodium hydroxide.
Cov tshuaj acetic acid ntsev tov yog tsim rau tooj liab + npib tsib xee + chromium los yog npib tsib xee + chromium hniav txheej, thiab kuj yog tsim rau txhuas anodized films.
3. Copper Accelerated Acetic Salt Spray Test (CASS test) Hauv kev npaj ntsev tov, ntxiv tooj liab chloride (CuCl2·2H2O) nrog ib tug concentration ntawm 0.26 g/L±0.{{8 }}2 g/L (piv txwv li 0.205g/L ± 0.015 g/L anhydrous tooj liab chloride), ua rau muaj zog corrosion, thiab nws tus nqi corrosion yog li ntawm 8 npaug ntawm NSS xeem. Cov tooj liab nrawm acetate ntsev tsuag tshuaj ntsuam yog tsim rau tooj liab + npib tsib xee + chromium los yog npib tsib xee + chromium hniav txheej, thiab kuj yog tsim rau txhuas anodized films.
4. Kev ntsuas tshuaj ntsev alternating yog ib qho kev ntsuam xyuas ntsev tsuag. Nws yog qhov tseeb qhov nruab nrab ntsev tsuag tshuaj ntsuam ntxiv rau qhov av noo tas li thiab ntsuas kub. Nws yog tsuas yog siv rau kab noj hniav hom ua tiav tshuab khoom. Los ntawm kev nkag mus ntawm qhov chaw noo noo, ntsev tsuag corrosion tshwm sim tsis tau tsuas yog nyob rau saum npoo ntawm cov khoom, tab sis kuj nyob rau hauv cov khoom. Nws hloov pauv cov khoom lag luam nyob rau hauv ob qho tib si ib puag ncig: ntsev tsuag thiab cov cua sov, thiab thaum kawg ntsuas seb puas muaj kev hloov pauv ntawm cov khoom siv hluav taws xob thiab cov khoom siv ua tiav.
Yuav ua li cas npaj cov dej ntsev rau kev sim tshuaj tsuag ntsev? Puas yog dej ntsev zoo tib yam?
Kev npaj cov ntsev ntsev rau nruab nrab ntsev tsuag tshuaj ntsuam. Dissolve analytically ntshiab sodium chloride nyob rau hauv purified dej ntawm ib tug concentration ntawm (50 ± 10) g / L. Siv cov ntawv ntsuas pH los ntsuas pH tus nqi ntawm cov tshuaj ntsuam xyuas ntawm 25 degree kom yog 6.5 txog 7.5. Thaum nws tshaj qhov ntau, tshuaj ntsuam qib hydrochloric acid lossis sodium hydroxide tov tuaj yeem ntxiv rau kev hloov kho. Cov tshuaj npaj yuav tsum tau lim ua ntej siv.
Ntsev, los ntawm cov ntsiab lus tshuaj ntawm kev pom, yog hais txog ib qho chaw uas muaj hlau ion lossis ammonium ion (NH4) ua ke nrog cov kua qaub ion lossis cov hlau tsis yog hlau. Nws kuj yog ib yam khoom tseem ceeb hauv peb lub neej txhua hnub. Yuav kom paub meej ntxiv, muaj ob hom ntsev, ib qho yog ntsev ntsev thiab lwm yam yog ntsev ntsev.
Muaj ntsev: Nws yog siv dav hauv kev lag luam thiab yog ib qho ntawm cov khoom siv raw khoom hauv kev lag luam tshuaj. Nws cov khoom tseem ceeb yog sodium chloride, uas yog hu ua "niam ntawm kev lag luam tshuaj". Ntawm cov khoom tseem ceeb ntawm kev lag luam tshuaj lom neeg, hydrochloric acid, caustic soda, soda tshauv, sodium chloride, chlorine, thiab lwm yam yog tsim los ntawm kev lag luam ntsev raws li raw cov ntaub ntawv, thiab kuj yog ib qho tseem ceeb tshuaj tshuaj rau kev ua hauj lwm ntawm ntsev tsuag chambers. .
Kev noj ntsev yog hais txog cov ntsev uas siv tau nrog sodium chloride ua cov khoom tseem ceeb tau los ntawm seawater, underground pob zeb (mine) ntsev deposits, natural brine (salty) dej, thiab lwm yam. Noj ntsev yog ib qho ntawm feem ntau siv seasonings nyob rau hauv ua noj ua haus. Ua ntej, nws kuj yog ib qho khoom tseem ceeb rau kev ua haujlwm physiological ntawm tib neeg lub cev. Vim yog lub luag haujlwm tseem ceeb ntawm cov ntsev ntsev hauv peb cov zaub mov noj txhua hnub, peb lub teb chaws muaj cov kev cai nruj heev ntawm kev noj ntsev kom zoo.
Txhawm rau muab nws yooj yim, cov qauv kev lag luam ntsev yog qhov yooj yim, thaum cov qauv rau cov ntsev noj tsis tsuas yog qhia cov ntsiab lus ntawm sodium chloride, tab sis kuj txwv cov ntsiab lus ntawm lwm cov khoom xyaw uas cuam tshuam rau tib neeg kev noj qab haus huv, yog li ua kom tib neeg noj qab haus huv. Yog li, qhov no kuj txiav txim siab tias txawm hais tias lub ntsiab lus tseem ceeb ntawm cov ntsev muaj ntsev yog sodium chloride, nws tsis tuaj yeem siv ncaj qha los ua ntsev. Ntawm qhov tsis sib xws, cov ntsev tuaj yeem siv tsis tuaj yeem siv hauv cov tshuaj ntsev tsuag tshuaj ntsuam xyuas chav kuaj, txwv tsis pub cov txiaj ntsig kuaj yuav raug cuam tshuam.
Piv txwv li, lub rooj ntsev peb feem ntau noj muaj cov poov tshuaj iodate. Lub xub ntiag ntawm impurities xws li poov tshuaj iodate yuav tsis muaj zog qhov tseeb ntawm cov khoom kuaj, thiab nws tseem yuav txhaws lub nozzle, uas yuav txo tau cov kev pab cuam lub neej ntawm cov khoom. Nco ntsoov xaiv tus kws tshaj lij. "Ntshav" mus kuaj. Tsuas yog nyob rau hauv txoj kev no tuaj yeem kuaj qhov tseeb raws li qhov yuav tsum tau ua.
Lub sij hawm ntau npaum li cas sib npaug rau 1 teev ntawm kev ntsuas ntsev tsuag hauv ib puag ncig ntuj?
Thaum kuaj cov qauv khoom hauv ib puag ncig ntuj, lub sijhawm corrosion yuav siv sijhawm ib xyoos lossis ntau xyoo. Txawm li cas los xij, thaum kuaj nyob rau hauv cov khoom siv ntsev tsuag ib puag ncig, nws tsuas yog siv sijhawm hnub lossis ntau teev kom tau txais cov txiaj ntsig zoo sib xws. Yog li dab tsi yog qhov kwv yees kev sib raug zoo ntawm kev kuaj ntsev ntsev thiab kev xeb hauv ib puag ncig ntuj? Lub sij hawm npaum li cas sib npaug rau 1 teev nyob rau hauv kev ntsuam xyuas ntsev tsuag hauv ib puag ncig ntuj?
Lub sijhawm kwv yees hloov dua siab tshiab kev sib raug zoo ntawm lawv yog: (rau kev siv nkaus xwb)
Neutral ntsev tsuag tshuaj ntsuam 24h ⇌ ib puag ncig ntuj 1 xyoo
Acetate ntsev tsuag kuaj 24h ⇌ ib puag ncig ntuj 3 xyoos
Copper ntsev accelerated acetate ntsev tsuag tshuaj ntsuam 24h ⇌ ib puag ncig ntuj 8 xyoo