Xeb inhibitors. xeb tiv thaiv txoj kev

Txhua txhua xyoo, hais txog ib tug peb lub hlis twg ntawm cov hlau nyob rau hauv lub ntiaj teb no, yog poob vim txoj kev loj hlob thiab corrosion dab. Cov nqi uas txuam nrog rau kho thiab hloov ntawm cov khoom thiab kev sib txuas lus ntawm tshuaj nroj tsuag, feem ntau ob peb lub sij hawm siab tshaj tus nqi ntawm cov ntaub ntawv, uas tau yuav tsum tau rau lawv siv thiab ua. Corrosion yog hu ua txawj disintegration ntawm hlau thiab alloys nyob rau hauv tus ntawm ib puag ncig. Txawm li cas los, koj yuav tiv thaiv koj tus kheej los ntawm cov dab. Muaj ntau txoj kev los tiv thaiv tiv thaiv xeb, raws li zoo raws li hloov tau. Nyob rau hauv lub teb ntawm cov tshuaj ntau lawm feem ntau hom ntawm xeb yog roj, atmospheric thiab electrochemical.

tawm teeb meem

Xaiv ib txoj kev rau kev tswj nyob rau hauv cov ntaub ntawv no yog nyob tsis tau tsuas yog nyob rau hauv lub hlau nta, tab sis kuj nyob rau hauv lub khiav hauj lwm tej yam kev mob. Txoj kev ntawm xeb tiv thaiv raug xaiv raws li cov yam, Txawm li cas los, thiab muaj yog feem ntau ib tug xov tooj ntawm cov teeb meem. Ib qho teeb meem yog txuam nrog rau qhov kev xaiv rau multi-tivthaiv nruab nrab nrog tsis uas sib txawv thaum lub sij hawm tus txheej txheem. Nyob rau hauv lub tshuaj kev lag luam nws yog heev. Txoj kev tiv thaiv tiv thaiv xeb uas yog siv nyob rau hauv kev xyaum, muab faib los ntawm qhov xwm ntawm lawv cov teebmeem nyob rau ib puag ncig thiab cov hlau.

Impact on qhov ib puag ncig

Txawm nyob rau hauv cov Nrab Hnub nyoog, lawv twb paub tshwj xeeb cov tshuaj uas tau pib nyob rau hauv tus me ntau uas tso cai rau kom tsis txhob muaj lub Aggressiveness ntawm lub corrosive ib puag ncig. Rau lub hom phiaj no, nws twb txiav txim siab los siv roj, resins thiab starches. Tshaj yav dhau los lub sij hawm, muaj ntau thiab ntau xeb inhibitors. Thaum lub caij, tsuas yog Russia yuav suav dozens ntawm manufacturers. Contact lenses ntawm hlau xeb yog ntau vim lawv tus nqi pheej yig. Lawv yog cov zoo tshaj plaws nyob rau hauv lub nruab qhov twg muaj ib qhov los yog ib tug me ntsis tshiab ntim ntawm lub corrosive nruab nrab, piv txwv li nyob rau hauv tso tsheb hlau luam, reservoirs, cua txias tshuab, boilers thiab lwm yam tshuaj units.

zog

Corrosion inhibitors tej zaum yuav organic thiab inorganic xwm. Lawv yuav tsum tau muaj kev tiv thaiv los ntawm raug kua los yog roj raug. Corrosion inhibitors nyob rau hauv lub roj av lag luam nyob rau hauv feem ntau yog txuam nrog rau inhibition ntawm anodic thiab cathodic electrochemical dab puas tsim ntawm passivating thiab kev tiv thaiv films. Koj yuav saib tau lub essence ntawm no.

Anodic xeb inhibitors yog raws li passivation corroding anodic chaw cov hlau nto, uas yog qhov ua rau ntawm passivating lub npe. Raws li xws oxidants txwm siv inorganic nitrates, chromates thiab molybdates. Lawv yog yooj yim txo nyob rau cathode chaw, vim hais tias cov uas yog zoo xws li cov depolarizers, txo cov kev ceev ntawm txoj kev hloov ntawm lub anode nyob rau hauv ib tug tov uas muaj ions ntawm cov corroding hlau.

Anode retarders xam tau tias yog ib co tebchaw tsis tsiag ntawv los ntawm xub ntiag ntawm oxidative zog: polyphosphates, phosphates, sodium benzoate, silicates. Lawv txiav txim raws li inhibitors tshwm heev dua lwm yam nyob rau hauv lub xub ntiag ntawm oxygen, uas plays lub luag hauj lwm ntawm passivating neeg sawv cev. Cov tshuaj ua rau lub adsorption ntawm oxygen nyob rau cov hniav hlau. Nyob rau hauv tas li ntawd, lawv ua inhibition ntawm anodic xaus txheej txheem vim tus tsim ntawm kev tiv thaiv films, uas muaj xws li ib tug sparingly soluble cov tshuaj tiv thaiv cov khoom ntawm inhibitor thiab hlau ions dua mus rau hauv cov kua.

nta

Anodic xeb inhibitors ntawm co muaj peev xwm yuav nqa mus rau hauv qeb ntawm txaus ntshai, vim hais tias lawv tig tawm mus rau moderators initiators tug txheej txheem nyob rau hauv tej yam tej yam kev mob. Kom tsis txhob no, nws yog tsim nyog tias xeb tam sim no ceev yog siab tshaj uas nyob rau ntawm uas tus tsis yog tsim passivation ntawm anodic chaw. passivating neeg sawv cev concentration yuav tsum tsis txhob txo hauv qab no ib tug kev muaj nuj nqis, txwv tsis pub lub passivation tej zaum yuav tsis tshwm sim, los yog nws yuav ua tsis tiav. Cov yav tas kev xaiv no yog fraught nrog zoo txaus ntshai, vim hais tias nws ua rau yuav txo tau ntawm lub anode nto, nce nyob rau hauv qhov tob thiab hlau puas tus nqi nyob rau hauv me me.

uas yuav tsum tau

Nws hloov tawm hais tias yuav muab tau zoo tiv thaiv nyob rau hauv cov ntaub ntawv ntawm lub anode kom muaj lub concentration ntawm inhibitor saum toj no lub nqi siab tshaj plaws rau tag nrho cov aav tsab xov xwm uas undergoes kev tiv thaiv. Cov ntaub ntawv yog heev nkag siab lub pH theem ntawm qhov nruab nrab. Nyob rau hauv feem ntau tus neeg mob, chromates thiab nitrates yog siv nyob rau hauv tshav kub exchangers thiab los tiv thaiv cov yeeb nkab nto.

cathodic inhibitor

Los ntawm kev tiv thaiv los ntawm cov tshuaj yog tsis tshua zoo nyob rau hauv kev sib piv mus rau lub anode. Lawv cov nyhuv yog raws li nyob rau hauv lub fact tias lub zos alkalinization ntawm qhov nruab nrab tau nyob rau hauv lub tsim ntawm cov cathode feem insoluble khoom, lub insulating feem ntawm tus nto ntawm cov tshuaj. Raws li xws tshuaj tej zaum yuav ua, piv txwv li, calcium bicarbonate, tso ib alkalized nruab nrab poov hlau carbonate raws li ib tug precipitate, nws yog ib qhov nyuaj niaj nyias mus nyias. Cathode xeb inhibitor, muaj pes tsawg leeg uas nyob rau cov ib puag ncig ntawm qhov kev siv tsis ua rau muaj zog puas muaj dab, txawm nyob rau hauv uas tsis muaj cov ntsiab lus.

hom

Nyob rau hauv nruab nrab xov xwm raws li cathode thiab anode inhibitors feem ntau ua inorganic tshuaj, tab sis lawv tsis muaj peev xwm pab nyob rau hauv zoo acidic daws teeb meem. Raws li retarders nyob rau hauv cov txheej txheem siv organic acid tshuaj uas molecules muaj kev los yog ncov qaumteb qabteb pawg, piv txwv li amines, thiourea, aldehydes, phenols thiab carbonate ntsev.

Nyob rau lub mechanism ntawm qhov kev txiav txim ntawm lub xeb inhibitors yog txawv adsorption cim. Tom qab adsorption mus rau lub cathode los yog anode feem lawv xav es cov kws hydrogen ions thiab cov hlau ionization cov tshuaj tiv thaiv. Yuav kom ib tug loj degree tus tiv thaiv cov nyhuv yog raws li nyob rau hauv kub, concentration, ib tug acid anion, thiab hydrogen ion concentration. Lawv feem ntau ntxiv nyob rau hauv me me qhov ntau, vim hais tias tus tiv thaiv nyhuv ntawm ib tug xov tooj ntawm cov organic inhibitors nyob rau hauv siab ntau yuav ua tau txawm txaus ntshai.

Piv txwv li, cov organic compound hu ua "Penta-522" - neftevodorastvorimy. Nws yog tau los muab ib tug degree ntawm kev tiv thaiv ntau dua 90% ntawm tus nqi ntawm 15-25 grams tauj ib ton. Corrosion inhibitor ua nyob rau hauv nqe lus hais txog "Aminkor" cim - ib yam khoom ntawm lub esterification ntawm carboxylic acids, uas yog tsis volatile, tsis muaj ib tug unpleasant tsw, havzoov. Nws ntau npaum yog txiav txim tsuas yog tom qab lub installation ntawm cov neeg ntawm xeb ua si ntawm lub tiag tiag ib puag ncig.

Los rau Hlau

Qhov no pab pawg neeg ntawm txoj kev tiv thaiv yuav siv ntawm ib tug ntau yam ntawm coatings. Qhov no xim, hlau, roj hmab, thiab lwm yam. Lawv yog siv nyob rau hauv ntau txoj kev: los ntawm txau, electroplating, thiab lwm yam rubberizing. Koj yuav saib tau txhua yam ntawm lawv.

Los ntawm rubberizing kheev to taub xeb tiv thaiv los ntawm roj hmab coatings uas yog feem ntau yuav tsum tau nyob rau hauv cov tshuaj ntau lawm. Roj Hmab tebchaw tau nce tshuaj stability thiab muab kev tiv thaiv rau ntim, dab dej, raws li zoo li lwm yam tshuaj cov khoom los ntawm corrosion thiab corrosion. Gumming yog txias thiab kub vulcanization txheej txheem uas yog nqa epoxy thiab PTFE mixtures.

Nws yog ib qho tseem ceeb kom tsis tsuas xaiv, tab sis kuj ua rau xeb inhibitor. Manufacturers feem ntau muab ib tug txaus ntshiab kev taw qhia nyob rau hauv qhov teeb meem. Thaum no tus taw tes, nyob rau hauv tas li ntawd mus electroplating, ib tug muaj zog txaus txoj kev uas yuav tau txais high-ceev tis ntawm cov txau. Nrog nws cov kev pab daws tau ib tug dav spectrum ntawm kev pab raws qib. Nws yuav tsum muaj ntaub ntawv rau hmoov ntaub ntawv rau cov coatings coj txawv zog.

tiv thaiv cov khoom

Cov teeb meem muaj feem xyuam rau cov kev tiv thaiv ntawm cov tshuaj cov khoom, yog heev txog, thiab yog li ntawd yuav tsum tau ceev faj heev xav. Qhov kev xaiv ntawm cov ntaub ntawv uas rau cov high-zoo coatings yuav tsum tau ib tsom xam ntawm tus nto lub xeev, muaj pes tsawg leeg ntawm qhov nruab nrab, cov kev khiav hauj lwm tej yam kev mob, cov neeg kawm ntawv ntawm Aggressiveness, thiab lwm yam kub tej yam kev mob. Tej zaum "yooj yim teeb meem" yog ib tug tseem ceeb heev parameter, uas complicates cov kev xaiv ntawm lub hom txheej, piv txwv li, muab cub, txawm txhua txhua ob peb lub hlis ib hluav taws roj zeb tank. Uas yog vim li cas txhua txhua txhoj puab heev puag ncig yuav tsum tau xaiv ntawm cov zaj duab xis qub thiab yam rau xws coatings uas yog yus muaj los kuj mus rau lub reactants.

dissent

Kws txawj hais tias yuav tsis muab piv nrog txhua lwm yam thermal txau txoj kev, thiab tshwj xeeb tshaj yog hais tias ib co ntawm lawv yog cov zoo tshaj rau lwm. Koj ib leeg muaj tej yam zoo thiab tsis zoo, thiab lub resulting coatings muaj ntau thaj chaw uas hais lus rau lawv muaj peev xwm mus daws tau ib co ntawm nws paub tab. Lub pom muaj pes tsawg leeg, uas yuav tsum tau tsiag ntawv los ntawm xeb inhibitors, thiab lawv txoj kev ntawm daim ntawv thov raug xaiv nyob rau hauv dependence rau cov ntaub ntawv.

Cov tshuaj loj hlob rov qab, qhov no txoj kev yog feem ntau siv nyob rau hauv tus txheej txheem ntawm nqa tawm niaj hnub kho. Txawm yog hais tias tus acidic xeb inhibitors siv, nws yog tsim nyog los ua ntej npaj rau qhov chaw zoo tshaj ntawm cov hlau. Tib txoj kev kom koj tau txais ib tug zoo cover. Ua ntej qhov ncaj daim ntawv thov ntawm cov painting cov ntaub ntawv uas yuav siv tau blasting uas muaj yog muab ib tug ncaj ntxhib saum npoo av.

Txhua txhua xyoo ntau thiab ntau tshiab txoj kev loj hlob zoo nkaus li nyob rau hauv kev ua lag luam, thiab muaj yog loj xaiv. Txawm li cas los, chemists yuav tsum txiav txim siab yog dab tsi ntxiv muaj txiaj ntsim - mus caum raws sij hawm tiv thaiv cov khoom los yog cov tiav kev hloov ntawm tag nrho cov designs.