Kev xeb yog txheej txheem ntuj uas tshwm sim rau txhua yam hlau, tab sis nws tuaj yeem qeeb qeeb nrog ob peb yam kev kho mob sib txawv
Nws tshwm sim los ntawm kev muaj cov tshuaj oxidizing nyob ib puag ncig, zoo li dej lossis huab cua. Nws tuaj yeem yog teeb meem loj rau cov uas koom nrog hauv kev tsim kho loj siv cov khoom siv hlau, uas suav nrog cov tsev, tsheb, txuas hniav, dav hlau, thiab ntau ntxiv. Tab sis txawm tias cov khoom siv hlau me me yuav dhau los ua corroded thiab poob lawv lub zog lossis zoo nkauj. Hmoov zoo, koj tuaj yeem khaws cov txheej txheem no kom tshwm sim sai li sai tau nrog cov ntaub ntawv pom nyob ib puag ncig hauv tsev lossis nrog cov txuj ci siab rau kom muaj zog dua.
Cov kauj ruam
Txoj Kev 1 ntawm 3: Nkag Siab Hom Hom Hlau Corrosion
Vim tias muaj ntau yam sib txawv ntawm cov hlau siv niaj hnub no, cov neeg tsim khoom thiab cov tsim khoom yuav tsum tiv thaiv ntau yam sib txawv ntawm kev xeb. Txhua lub hlau muaj nws tus kheej cov khoom siv hluav taws xob tshwj xeeb uas txiav txim siab yam twg ntawm kev xeb (yog tias muaj) cov hlau tsis yooj yim rau. Cov lus hauv qab no qhia meej txog kev xaiv cov hlau sib txawv thiab hom kev xeb uas lawv tuaj yeem ua tau.
| Hlau | Hlau Corrosion Vulnerability (s) | Cov Txheej Txheem Tiv Thaiv | Kev ua Galvanic* |
|---|---|---|---|
| Stainless hlau (Passive) | Kev tawm tsam tsis zoo, galvanic, pitting, crevice (txhua qhov tshwj xeeb hauv cov dej ntsev) | Ntxuav, tiv thaiv txheej lossis foob | Tsawg (thawj daim ntawv xeb tiv taus txheej txheej oxide) |
| Hlau | Uniform nres, galvanic, crevice | Ntxuav, tiv thaiv txheej lossis foob, galvanization, tiv thaiv xeb sol'ns | Siab |
| Tooj dag | Uniform nres, dezincification, kev nyuaj siab | Kev tu, tiv thaiv txheej lossis foob (feem ntau yog roj lossis lacquer), ntxiv tin, txhuas, lossis arsenic rau hlau | Nruab nrab |
| Txhuas | Galvanic, pitting, crevice | Kev tu, tiv thaiv txheej lossis foob, anodizing, galvanizing, tiv thaiv cathodic, rwb thaiv tsev hluav taws xob | Siab (thawj daim ntawv xeb tiv taus txheej txheej oxide) |
| Tooj liab | Galvanic, pitting, zoo nkauj tarnishing | Kev tu, tiv thaiv txheej lossis foob, ntxiv npib tsib xee rau hlau (tshwj xeeb rau cov dej ntsev) | Tsawg (thawj daim ntawv xeb tiv thaiv patina) |
*Nco tseg tias kab ntawv "Galvanic Activity" hais txog cov hlau cov tshuaj lom neeg ua haujlwm raws li tau piav qhia los ntawm galvanic series ntxhuav los ntawm cov chaw siv. Rau lub hom phiaj ntawm lub rooj no, siab dua cov hlau cov kev ua haujlwm galvanic, qhov nrawm dua nws yuav ua rau cov xeb xeb thaum koom nrog cov hlau tsis tshua muaj zog.
Kauj Ruam 1. Tiv thaiv kom tsis zoo sib tsoo los ntawm kev tiv thaiv cov hlau nto
Kev tiv thaiv kev tiv thaiv tsis zoo ib yam (qee zaum luv rau "zoo ib yam" xeb) yog ib hom kev xeb uas tshwm sim, tsim nyog, nyob rau hauv kev hnav khaub ncaws zoo ib yam dhau ntawm cov hlau nthuav tawm. Hauv hom kev xeb no, tag nrho saum npoo ntawm cov hlau tau tawm tsam los ntawm kev xeb thiab, yog li, kev txhim kho xeb tau ua raws tus nqi ib yam. Piv txwv li, yog tias lub ru tsev hlau tsis tiv thaiv tsis tu ncua los nag, tag nrho lub ru tsev yuav los sib cuag nrog cov dej ib yam nkaus thiab yog li yuav corrode ntawm tus nqi sib xws. Txoj hauv kev yooj yim tshaj plaws los tiv thaiv kev tiv thaiv kev tiv thaiv tsis zoo yog feem ntau yog txhawm rau tiv thaiv kev tiv thaiv nruab nrab ntawm cov hlau thiab cov tshuaj tiv thaiv kab mob. Qhov no tuaj yeem yog ntau yam sib txawv - pleev xim, cov roj nplaum, lossis cov tshuaj siv hluav taws xob zoo ib yam li txheej txheej galvanized.
Hauv cov xwm txheej hauv av lossis raus dej, tiv thaiv cathodic kuj yog qhov kev xaiv zoo
Kauj Ruam 2. Tiv thaiv galvanic corrosion los ntawm kev txwv ion ntws los ntawm ib qho hlau mus rau lwm qhov
Ib daim ntawv tseem ceeb ntawm kev xeb uas tuaj yeem tshwm sim tsis hais lub cev lub zog ntawm cov hlau koom nrog yog galvanic corrosion. Galvanic corrosion tshwm sim thaum ob lub hlau uas muaj peev xwm sib txawv ntawm cov hluav taws xob muaj kev sib cuag nrog ib leeg thaum muaj cov electrolyte (zoo li dej ntsev) uas tsim txoj hauv kev ua hluav taws xob ntawm ob. Thaum qhov no tshwm sim, cov hlau ions ntws los ntawm cov hlau ua haujlwm ntau dua mus rau cov hlau tsis muaj zog, ua rau cov hlau nquag siv rau corrode ntawm qhov nrawm dua thiab cov hlau tsis tshua muaj zog ua rau corrode ntawm qhov qeeb. Hauv cov ntsiab lus, qhov no txhais tau tias kev txhim kho xeb yuav ua rau cov hlau ua haujlwm ntau dua thaum pom ntawm ob lub hlau.
- Txhua txoj hauv kev tiv thaiv uas tiv thaiv ion ntws ntawm cov hlau tuaj yeem muaj peev xwm nres galvanic corrosion. Muab cov hlau tiv thaiv txheej tuaj yeem pab tiv thaiv electrolytes los ntawm ib puag ncig los ntawm kev tsim txoj hauv kev ua hluav taws xob ntawm ob lub hlau, thaum cov txheej txheem tiv thaiv hluav taws xob zoo li galvanization thiab anodizing kuj ua haujlwm zoo. Nws kuj tseem tuaj yeem tiv thaiv cov xeb xeb los ntawm hluav taws xob tiv thaiv thaj chaw ntawm cov hlau uas tau sib chwv.
- Ib qho ntxiv, kev siv cathodic tiv thaiv lossis anode sacrificial tuaj yeem tiv thaiv cov hlau tseem ceeb los ntawm kev xeb hlau. Saib hauv qab no kom paub ntau ntxiv.
Kauj Ruam 3. Tiv thaiv pitting xeb los ntawm kev tiv thaiv cov hlau nto, zam kev ib puag ncig cov tshuaj chloride, thiab zam kev nicks thiab khawb
Pitting yog ib daim ntawv ntawm kev xeb uas tshwm sim ntawm qhov ntsuas me me tab sis tuaj yeem muaj qhov tshwm sim loj. Pitting yog qhov kev txhawj xeeb loj rau cov hlau uas tau txais lawv cov tshuaj tiv thaiv xeb los ntawm txheej nyias txheej ntawm cov tshuaj sib xyaw ua ke ntawm lawv qhov chaw, vim tias daim ntawv xeb no tuaj yeem ua rau kev ua haujlwm tsis zoo hauv cov xwm txheej uas txheej tiv thaiv ib txwm tiv thaiv lawv. Pitting tshwm sim thaum ib feem me me ntawm cov hlau poob nws cov txheej txheem tiv thaiv passive. Thaum qhov no tshwm sim, galvanic corrosion tshwm sim ntawm qhov ntsuas me me, ua rau tsim ntawm qhov me me ntawm cov hlau. Tsis pub dhau lub qhov no, ib puag ncig ib puag ncig dhau los ua kua qaub, uas ua kom cov txheej txheem nrawm dua. Qhov ua paug feem ntau yog tiv thaiv los ntawm kev thov txheej txheej tiv thaiv rau saum npoo hlau thiab/lossis siv kev tiv thaiv cathodic.
Raug rau ib puag ncig muaj cov tshuaj chlorides siab (zoo li, piv txwv li, dej ntsev) tau paub kom nrawm cov txheej txheem pitting
Kauj Ruam 4. Tiv thaiv qhov txhav txhav los ntawm kev txo qhov chaw nruj hauv kev tsim cov khoom
Kev txhaws txhav tshwm sim hauv qhov chaw ntawm cov khoom siv hlau uas nkag mus rau cov dej ib puag ncig (huab cua lossis kua) tsis zoo - piv txwv li, hauv qab ntsia hlau, hauv tshuab ntxhua khaub ncaws, hauv qab lub qhov txhab, lossis nruab nrab ntawm pob qij txha. Kev txhaws txhav tshwm sim qhov twg qhov sib txawv nyob ze ntawm cov hlau saum npoo yog dav txaus kom tso cov kua nkag mus tab sis nqaim txaus tias cov kua muaj teeb meem tawm mus thiab ua rau tsis nyob twj ywm. Ib puag ncig ib puag ncig hauv cov chaw me me no tau xeb thiab cov hlau pib xeb hauv cov txheej txheem zoo ib yam li pitting xeb. Tiv thaiv kom tsis txhob xeb hauv qhov feem ntau yog qhov teeb meem tsim. Los ntawm kev txo qis qhov tshwm sim ntawm qhov khoob khoob hauv cov khoom siv hlau los ntawm kev kaw cov khoob no lossis tso cai ncig, nws muaj peev xwm txo qis qhov txhav txhav.
Kev txhuam hniav yog qhov txhawj xeeb tshwj xeeb thaum cuam tshuam nrog cov hlau zoo li txhuas uas muaj kev tiv thaiv, txheej txheej txheej sab nrauv, vim tias cov txheej txheem ntawm kev xeb xeb tuaj yeem ua rau tawg ntawm txheej no
Kauj Ruam 5. Tiv thaiv kev ntxhov siab los ntawm kev tawg los ntawm kev siv tsuas yog cov khoom muaj kev nyab xeeb thiab/lossis ua kom tsis huv
Kev nyuaj siab txhav txhav tawg (SCC) yog ib daim ntawv tsis tshua muaj kev cuam tshuam txog kev txhim kho xeb uas yog qhov kev txhawj xeeb tshwj xeeb rau cov kws tsim txuj ci them nqi nrog lub tsev tsim los txhawb nqa cov haujlwm tseem ceeb. Thaum muaj xwm txheej ntawm SCC, cov hlau ua rau lub cev tawg thiab tawg qis dua nws qhov kev txwv tshwj xeeb - hauv cov xwm txheej hnyav, ntawm ib feem ntawm qhov txwv. Thaum muaj cov tshuaj corrosive ions, me me, cov kab tawg me me hauv cov hlau ua los ntawm kev sib zog tensile los ntawm lub nra hnyav nthuav tawm thaum cov ions corrosive mus txog qhov kawg ntawm qhov tawg. Qhov no ua rau qhov tawg zuj zus zuj zus thiab muaj peev xwm ua rau cov txheej txheem tsis ua tiav. SCC yog qhov txaus ntshai tshwj xeeb vim tias nws tuaj yeem tshwm sim txawm tias muaj cov tshuaj uas ib txwm tsuas yog ua rau cov hlau tsis zoo. Qhov no txhais tau tias kev phom sij txaus ntshai tshwm sim thaum seem ntawm cov hlau saum npoo zoo li tsis muaj kev cuam tshuam.
- Kev tiv thaiv SCC yog ib feem tsim teeb meem. Piv txwv li, los ntawm kev xaiv cov khoom uas yog SCC-tiv taus nyob rau ib puag ncig uas cov hlau yuav ua haujlwm thiab ua kom ntseeg tau tias cov khoom siv hlau raug ntsuas kom raug tuaj yeem pab tiv thaiv SCC. Ib qho ntxiv, cov txheej txheem ntawm kev pleev xim hlau tuaj yeem tshem tawm cov kev nyuab siab los ntawm nws cov khoom lag luam.
- SCC paub tias ua rau hnyav dua los ntawm qhov kub thiab muaj cov kua uas muaj cov tshuaj chloride yaj.
Txoj Kev 2 ntawm 3: Tiv Thaiv Kev Corrosion nrog Kev daws Tsev
Kauj Ruam 1. Xim cov hlau
Tej zaum feem ntau, txoj hauv kev pheej yig tiv thaiv cov hlau los ntawm kev xeb yog yooj yim los npog nws nrog txheej xim. Cov txheej txheem ntawm kev xeb cuam tshuam nrog ya raws thiab tus neeg sawv cev oxidizing cuam tshuam nrog cov hlau saum npoo av. Yog li, thaum cov hlau tau pleev xim nrog cov xim thaiv, tsis muaj dej noo lossis cov neeg ua kom oxidizing tuaj yeem cuam tshuam nrog cov hlau nws tus kheej thiab tsis muaj kev xeb tshwm sim.
- Txawm li cas los xij, xim nws tus kheej tsis yooj yim rau kev puas tsuaj. Rov ua dua cov xim thaum twg nws tau chipped, hnav lossis puas. Yog tias xim pleev xim rau qhov uas cov hlau hauv qab tau nthuav tawm, nco ntsoov tshuaj xyuas qhov xeb lossis puas rau ntawm cov hlau raug.
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Muaj ntau txoj hauv kev los thov pleev xim rau cov hlau. Cov neeg ua haujlwm hlau feem ntau siv ob peb txoj hauv kev no los ua kom ntseeg tau tias tag nrho cov khoom siv hlau tau txais txheej txheej zoo. Hauv qab no yog qhov piv txwv ntawm cov txheej txheem nrog cov lus hais txog lawv kev siv:
- Txhuam-siv rau qhov chaw nkag mus tau yooj yim.
- Cov menyuam - siv rau npog thaj tsam loj. Pheej yig thiab yooj yim.
- Dej tsuag - siv los npog thaj tsam loj. Ceev tab sis tsis tshua muaj txiaj ntsig ntau dua li cov menyuam (cov xim pleev xim yog siab).
- Airless tsuag/Electrostatic airless tsuag - siv rau npog thaj tsam loj. Ceev thiab tso cai rau qib sib txawv ntawm tuab/nyias sib xws. Tsawg pov tseg ntau dua li cov tshuaj tsuag tsuag. Khoom siv yog kim.
Kauj Ruam 2. Siv cov xim pleev xim rau xim hlau rau dej
Cov khoom siv hlau uas tsis tu ncua (lossis tas li) nkag mus rau hauv dej, zoo li nkoj, xav tau cov xim tshwj xeeb los tiv thaiv qhov ua tau ntawm kev xeb ntau ntxiv. Hauv cov xwm txheej no, "ib txwm" xeb hauv daim ntawv xeb tsis yog qhov kev txhawj xeeb nkaus xwb (txawm hais tias nws yog ib qho tseem ceeb), raws li kev ua neej nyob hauv hiav txwv (barnacles, thiab lwm yam) uas tuaj yeem loj hlob ntawm cov hlau tsis muaj kev tiv thaiv tuaj yeem dhau los ua qhov chaw hnav ntxiv thiab corrosion. Txhawm rau tiv thaiv cov khoom hlau zoo li lub nkoj thiab lwm yam, nco ntsoov siv cov qib qib epoxy xim av. Tsis yog tsuas yog ua cov xim no tiv thaiv cov hlau hauv qab los ntawm kev ya raws, tab sis kuj ua rau kev poob siab ntawm kev loj hlob ntawm lub neej hauv hiav txwv ntawm nws qhov chaw.
Kauj Ruam 3. Siv cov roj nplua nyeem tiv thaiv kom txav cov hlau
Rau cov tiaj tiaj, cov hlau zoo li qub, pleev xim ua haujlwm zoo ntawm kev khaws cov dej noo thiab tiv thaiv kev xeb yam tsis cuam tshuam rau cov hlau muaj txiaj ntsig. Txawm li cas los xij, xim feem ntau tsis haum rau txav cov hlau. Piv txwv li, yog tias koj pleev xim rau ntawm lub qhov rooj pob khawm, thaum cov xim qhuav, nws yuav tuav lub pob khawm nyob hauv qhov chaw, cuam tshuam nws cov lus tsa suab. Yog tias koj quab yuam lub qhov rooj qhib, cov xim yuav tawg, tawm hauv qhov kom ya raws mus txog ntawm cov hlau. Qhov kev xaiv zoo dua rau cov hlau ib yam li pob khawm, pob qij txha, kabmob, thiab lwm yam yog cov dej tsis haum uas tsis haum. Ib lub tsho tiv no kom zoo ntawm cov roj nplua nyeem no yuav tiv thaiv kom ya raws thaum ib txhij ua kom ntseeg tau tias du, yooj yim txav ntawm koj cov hlau.
Vim tias cov roj nplua nyeem tsis qhuav hauv qhov chaw zoo li cov xim, lawv ua rau lub sijhawm qis thiab xav tau daim ntawv thov rov ua haujlwm. Rov thov cov roj nplua nyeem rau cov hlau ib ntus kom ntseeg tau tias lawv ua haujlwm tau zoo raws li kev tiv thaiv foob
Kauj Ruam 4. Ntxuav cov hlau kom huv ua ntej pleev xim lossis pleev xim
Txawm hais tias koj siv cov xim ib txwm muaj, xim dej hiav txwv, lossis tiv thaiv lub roj nplua nyeem/foob, koj yuav xav kom koj cov hlau huv thiab qhuav ua ntej pib txheej txheem thov. Saib xyuas kom ntseeg tau tias cov hlau tsis muaj hmoov av, roj, seem vuam seem, lossis cov xeb uas twb muaj lawm, vim cov khoom no tuaj yeem cuam tshuam koj kev siv zog los ntawm kev txhawb nqa yav tom ntej corrosion.
- Cov av, hmoov av, thiab lwm yam khib nyiab cuam tshuam nrog cov xim thiab cov roj nplua nyeem los ntawm kev khaws cov xim lossis roj nplua nyeem los ntawm kev ua ncaj qha mus rau cov hlau saum npoo. Piv txwv li, yog tias koj pleev xim rau ntawm cov hlau uas muaj ob peb cov hlau tsis huv rau nws, cov xim yuav teeb rau ntawm qhov quav, tawm qhov chaw seem ntawm cov hlau hauv qab. Yog tias thiab thaum cov plaub hau ntog tawm, qhov chaw nthuav tawm yuav tsis yooj yim rau xeb.
- Yog hais tias pleev xim lossis pleev xim rau saum npoo hlau nrog qee qhov xeb uas twb muaj lawm, koj lub hom phiaj yuav tsum yog ua kom cov nplaim du thiab tsis tu ncua li sai tau kom ntseeg tau tias qhov ua tau zoo tshaj plaws tuaj yeem ua tau ntawm cov nplaum. Siv xaim txhuam, ntawv txhuam, thiab/lossis tshuaj xeb tshem tawm kom tshem tawm xeb xeb ntau li ntau tau.
Kauj Ruam 5. Khaws cov khoom tiv thaiv hlau kom tsis txhob ya raws
Raws li tau sau tseg saum toj no, feem ntau cov ntawv ntawm kev xeb yog ua kom ntau ntxiv los ntawm kev ya raws. Yog tias koj tsis tuaj yeem tswj hwm koj cov hlau tiv thaiv txheej xim lossis foob, koj yuav tsum tau saib xyuas kom ntseeg tau tias nws tsis raug ya raws. Ua kom siv zog tiv thaiv cov cuab yeej hlau qhuav tuaj yeem txhim kho lawv cov txiaj ntsig thiab ua kom lawv lub neej muaj txiaj ntsig ntev dua.
Ntxiv rau kev saib xyuas kom pom cov dej noo thaum siv, nco ntsoov khaws cov khoom hlau sab hauv tsev hauv qhov chaw huv, qhuav. Rau cov khoom loj uas yuav tsis haum rau hauv lub txee lossis txee dai khaub ncaws, npog cov khoom nrog ntaub ntaub lossis ntaub. Qhov no pab tiv thaiv kom tsis txhob ya raws los ntawm huab cua thiab tiv thaiv kom tsis txhob muaj plua plav tawm ntawm cov av
Kauj Ruam 6. Khaws cov hlau kom huv raws li qhov ua tau
Tom qab txhua qhov siv cov khoom siv hlau, txawm tias cov hlau tau pleev xim los yog tsis, nco ntsoov ntxuav nws cov chaw ua haujlwm, tshem tawm cov av, hmoov av, lossis hmoov av. Kev sib sau ntawm cov av thiab cov khib nyiab ntawm cov hlau tuaj yeem ua rau hnav thiab pob ntseg ntawm cov hlau thiab/lossis nws cov txheej tiv thaiv, ua rau xeb nyob rau lub sijhawm.
Txoj Kev 3 ntawm 3: Tiv Thaiv Corrosion nrog Kev Siv Tshuaj Hluav Taws Xob Zoo
Kauj Ruam 1. Siv cov txheej txheem galvanization
Galvanized hlau yog hlau uas tau pleev xim nrog txheej txheej zinc kom tiv thaiv nws los ntawm kev xeb. Zinc yog tshuaj lom neeg ntau dua li cov hlau hauv qab, yog li nws oxidizes thaum raug cua. Thaum cov txheej txheej zinc oxidizes, nws tsim cov txheej tiv thaiv, tiv thaiv kom tsis txhob xeb ntawm cov hlau hauv qab. Qhov feem ntau hom galvanization niaj hnub no yog txheej txheem hu ua kub-dip galvanization uas cov hlau (feem ntau yog hlau) tau tso rau hauv lub qhov dej kub, yaj ziab kom tau txais txheej txheej.
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Cov txheej txheem no cuam tshuam nrog kev tuav cov tshuaj lom neeg, qee qhov uas muaj kev phom sij ntawm chav sov, ntawm qhov kub kub heev thiab yog li yuav tsum tsis txhob sim los ntawm lwm tus uas tsis yog kws tshaj lij. Hauv qab no yog cov theem pib ntawm cov txheej txheem kub-dip galvanization rau hlau:
- Cov hlau tau ntxuav nrog cov tshuaj ntxhua kom tshem tawm cov av, roj, xim, thiab lwm yam, tom qab ntawd yaug kom huv.
- Cov hlau yog khaws hauv cov kua qaub kom tshem cov nplai zeb, tom qab ntawd yaug.
- Cov khoom siv hu ua flux tau siv rau cov hlau thiab tso cai kom qhuav. Qhov no pab qhov kawg zinc txheej ua raws cov hlau.
- Cov hlau yog dipped nyob rau hauv lub vat ntawm molten zinc thiab tso cai rau kom sov mus rau qhov kub ntawm cov zinc.
- Cov hlau tau txias hauv "quench tank" uas muaj dej.
Kauj Ruam 2. Siv lub anode txi
Ib txoj hauv kev los tiv thaiv cov khoom hlau los ntawm kev xeb yog txhawm rau txuas hluav taws xob ib qho me me, cov khoom ua kom rov ua tau hlau hu ua sacrificial anode rau nws. Vim yog kev sib raug zoo ntawm cov khoom siv hlau loj dua thiab cov khoom me me uas tsis muaj zog (piav qhia luv luv hauv qab no), tsuas yog cov hlau me me, cov tshuaj tiv thaiv kab mob yuav raug xeb, tawm hauv qhov loj, cov khoom siv hlau tseem ceeb. Thaum lub anode sacrificial corrodes tag, nws yuav tsum tau hloov lossis cov khoom siv hlau loj dua yuav pib xeb. Txoj hauv kev tiv thaiv xeb no feem ntau siv rau cov khoom faus, zoo li cov tso tsheb tso rau hauv av, lossis cov khoom sib txuas nrog dej tas li, zoo li nkoj.
- Kev faus anodes yog tsim los ntawm ntau hom sib txawv ntawm cov hlau uas muaj reactive. Zinc, txhuas, thiab magnesium yog peb ntawm cov hlau feem ntau siv rau lub hom phiaj no. Vim tias cov khoom siv tshuaj lom neeg ntawm cov khoom siv no, zinc thiab txhuas feem ntau siv rau cov khoom siv hlau hauv cov dej ntsev, hos magnesium zoo dua rau cov hom phiaj dej tshiab.
- Yog vim li cas qhov kev txi anode ua haujlwm tau ua nrog cov tshuaj lom neeg ntawm cov txheej txheem xeb nws tus kheej. Thaum cov khoom siv hlau corrodes, thaj chaw uas siv tshuaj zoo ib yam li anodes thiab cathodes hauv cov khoom siv hluav taws xob zoo ib yam. Cov hluav taws xob ntws los ntawm qhov feem ntau anode ntawm cov hlau saum npoo mus rau ib puag ncig electrolytes. Txij li kev txi anodes yog cov tshuaj tiv thaiv zoo heev piv rau cov hlau ntawm qhov khoom raug tiv thaiv, cov khoom nws tus kheej dhau los ua cov cathodic hauv kev sib piv thiab, yog li, cov hluav taws xob ntws tawm ntawm cov anode uas txi, ua rau nws corrode tab sis sparing seem ntawm cov hlau.
Kauj Ruam 3. Siv kev txaus siab tam sim no
Vim tias cov txheej txheem tshuaj tom qab xeb hlau cuam tshuam nrog hluav taws xob tam sim no nyob rau hauv daim ntawv ntawm cov hluav taws xob ntws tawm ntawm cov hlau, nws muaj peev xwm siv sab nraud qhov hluav taws xob tam sim no kom kov yeej qhov xeb tam sim no thiab tiv thaiv xeb. Qhov tseem ceeb, cov txheej txheem no (hu ua kev txaus siab tam sim no) muab cov nqi hluav taws xob tsis zoo txuas ntxiv ntawm cov hlau raug tiv thaiv. Qhov kev them nyiaj no ua rau lub zog tam sim no ua rau cov hluav taws xob ntws tawm ntawm cov hlau, txwv kev xeb. Hom kev tiv thaiv no feem ntau yog siv rau cov txheej txheem hlau faus zoo li cov tso tsheb hlau luam thiab cov kav xa dej.
- Nco ntsoov tias hom tam sim no siv rau kev tiv thaiv kev tiv thaiv tam sim no feem ntau yog ncaj qha tam sim no (DC).
- Feem ntau, kev tiv thaiv kev tiv thaiv tsis zoo tam sim no yog tsim los ntawm faus ob lub hlau anodes hauv av nyob ze cov khoom hlau kom raug tiv thaiv. Tam sim no raug xa los ntawm cov xaim hluav taws xob mus rau anodes, uas tom qab ntawd ntws los ntawm cov av thiab nkag mus rau cov khoom siv hlau. Tam sim no dhau los ntawm cov khoom siv hlau thiab rov qab mus rau qhov chaw tam sim no (lub tshuab hluav taws xob, lub kho hluav taws xob, thiab lwm yam) los ntawm cov xaim hluav taws xob.
Kauj Ruam 4. Siv anodization
Anodizing yog ib hom tshwj xeeb tiv thaiv txheej txheej siv los tiv thaiv cov hlau los ntawm kev xeb thiab tseem yuav siv los thov kev tuag thiab lwm yam. Yog tias koj tau pom ib lub xim hlau ci ntsa iab carabiner, koj tau pom cov xim hlau xim anodized. Ntau dua li cuam tshuam nrog kev thov lub cev ntawm txheej txheej tiv thaiv, ib yam li tha xim, anodizing siv hluav taws xob tam sim no los muab cov hlau tiv thaiv txheej uas tiv thaiv yuav luag txhua hom kev xeb.
- Cov txheej txheem tshuaj tom qab anodization cuam tshuam nrog qhov tseeb tias ntau cov hlau, zoo li txhuas, ib txwm tsim cov khoom siv tshuaj hu ua oxides thaum lawv cuam tshuam nrog oxygen hauv huab cua. Qhov no ua rau cov hlau ib txwm muaj txheej txheej txheej txheej sab nrauv uas tiv thaiv (mus rau qib sib txawv, nyob ntawm cov hlau) tiv thaiv kev xeb ntxiv. Cov hluav taws xob tam sim no siv hauv cov txheej txheem anodizing yeej ib txwm ua kom cov tuab tuab ntawm cov oxide saum npoo ntawm cov hlau ntau dua li ib txwm tshwm sim, muab kev tiv thaiv zoo los ntawm kev xeb.
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Muaj ntau txoj hauv kev sib txawv rau anodize hlau. Hauv qab no yog cov theem pib ntawm ib qho txheej txheem anodizing. Saib Yuav Ua Li Cas Anodize Aluminium kom paub ntau ntxiv.
- Aluminium yog ntxuav thiab de-greased.
- Txhuas lub ntsej muag tsis zoo ntawm lub ntsej muag raug tshem tawm nrog cov tshuaj de-smut.
- Cov txhuas tau qis qis rau hauv cov kua qaub ntawm qhov tam sim no thiab kub (piv txwv li, 12 amps/sq ft thiab 70-72 degrees F (21-22 degrees C).
- Aluminium raug tshem tawm thiab yaug.
- Aluminium yog xaiv tau tso rau hauv cov zas xim ntawm 100-140 degrees F (38-60 degrees C).
- Aluminium tau ntim los ntawm muab nws tso rau hauv cov dej npau li 20-30 feeb.
Kauj Ruam 5. Siv cov hlau uas ua kom pom qhov ua kom pom tseeb
Raws li tau sau tseg saum toj no, qee cov hlau ib txwm tsim los tiv thaiv txheej txheej oxide thaum raug cua. Qee cov hlau tsim cov txheej txheej oxide no kom zoo uas lawv thiaj li dhau los ua cov tshuaj tsis muaj zog. Peb hais tias cov hlau no yog passive hauv kev hais txog txheej txheem ntawm passivation uas lawv dhau los ua neeg tsis tshua muaj zog. Nyob ntawm nws qhov kev xav tau siv, cov khoom siv hlau tsis zoo yuav tsis tas yuav tsum muaj kev tiv thaiv ntxiv kom nws tiv taus xeb.
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Ib qho piv txwv paub zoo ntawm cov hlau uas nthuav tawm passivation yog stainless hlau. Cov hlau tsis muaj hlau yog cov hlau tsis zoo ntawm cov hlau thiab chromium uas ua tau zoo tiv thaiv xeb hauv ntau qhov xwm txheej yam tsis xav tau lwm yam kev tiv thaiv. Rau feem ntau niaj hnub siv, kev xeb tsis feem ntau yog kev txhawj xeeb nrog cov hlau tsis huv.
Txawm li cas los xij, nws tau hais txog tias hauv qee qhov xwm txheej, cov hlau tsis xeb tsis yog 100% pov thawj -tshwj xeeb, hauv dej ntsev. Ib yam li ntawd, ntau yam hlau passive dhau los ua passive nyob rau qee qhov xwm txheej hnyav thiab yog li yuav tsis haum rau txhua qhov siv
