Hlau corrosion yog vim degradation ntawm cov ntaub ntawv hlau los ntawm ib puag ncig. Qhov cuam tshuam ncaj qha ntawm cov hlau xeb yog qhov luv ntawm lub neej kev pab cuam ntawm cov khoom siv engineering, thiab hlau corrosion tuaj yeem ua rau cov khoom siv degradation; hlau corrosion hem ib puag ncig kev nyab xeeb, thiab cov xau ntawm cov khoom siv hlau los yog cov tshuaj lom neeg ua rau muaj kev cuam tshuam los ntawm kev xeb tuaj yeem ua rau cov dej tsis zoo, huab cua thiab av ib puag ncig, thiab tuaj yeem ua rau muaj kev puas tsuaj loj. Hauv kev lag luam kws tshuaj, xeb liab (Daim duab 1), qhov tseem ceeb tshaj plaws ncaj qha cov khoom ntawm hlau corrosion, tuaj yeem ua rau kev puas tsuaj rau cov khoom, xws li cov kav dej xau, liab txawv teb chaws lub cev adhering rau diaphragms, thiab blockages ntawm lim ntsiab vim adsorption ntawm liab xeb.
Oxidation yog ib qho ntawm cov tshuaj tiv thaiv tseem ceeb tshaj plaws nyob rau hauv qhov xwm txheej, thiab xeb ntawm stainless hlau yog los ntawm nws qhov xwm txheej oxidation cov tshuaj tiv thaiv. Nyob rau hauv qhov xwm txheej, oxidation tshwm sim nyob rau hauv yuav luag tag nrho cov hlau, tshwj xeeb tshaj yog ib tug heev precious hlau. Ntev npaum li cov khoom hlau tau txo cov hlau monomers uas raug oxidation thiab raug oxidising ib puag ncig uas muaj oxygen, xeb yog ua txhua yam tom qab lub sijhawm.
1. Kev muab qhab nia ntawm cov xeb liab
Cov xeb liab yog qhov sib xyaw ntawm cov hlau oxides sib txawv, cov khoom siv hlau tsis muaj steel lossis cov tshuab muaj nyob rau hauv cov txheej txheem dej kub, qhov saum npoo ntawm cov hlau dawb yuav ua ntej ua rau cov hydroxide ions hauv dej, tag nrho cov txheej txheem tshuaj tiv thaiv yog ntau nyuaj, thiab Tej zaum nws thiaj li tsim kom muaj kev sib xyaw ntawm ferrous oxide, ferric oxide, ferrous hydroxide thiab ferric tetroxide, qhov tshwj xeeb muaj pes tsawg leeg ntawm qhov tshwj xeeb lub ntiajteb txawj nqus ntawm qhov sib txawv yuav txiav txim siab xim liab xeb Cov khoom tshwj xeeb tshwj xeeb lub ntiajteb txawj nqus yuav txiav txim siab xim liab xeb.
Qib 1 - Ib qho yooj yim los so, cov khoom me me tso tau yooj yim tshem tawm ntawm qhov chaw thiab tsis cuam tshuam qhov sib xyaw thiab roughness ntawm stainless hlau nto. Cov txheej txheem deposited feem ntau tshwm lub teeb daj, txiv kab ntxwv los yog txiv kab ntxwv-liab.
Qib 2- ib nrab erasable - yog tsim los ntawm oxidation ncaj qha rau ntawm qhov chaw uas tsis muaj kev cuam tshuam los yog qhov twg cov txheej txheem passivation tsis zoo ib yam thiab ntom. Nyob rau ntawm lub sij hawm no lub nto roughness ntawm stainless hlau yuav tshwm sim ho nce. Cov xim qhia ntau yam txiv kab ntxwv, liab, xim av, xiav-violet, grey-dub thiab lwm yam.
Qib 3- Ib yam khoom uas yuav luag indelible dub oxidation. Cov xim yuav maj mam coj mus rau ib tug golden, xiav xim mus rau ib tug tuab xim dub. Cov txheej oxide saum npoo yog qhov ruaj khov thiab kev tsiv teb tsaws ntawm cov khoom raug txo, tab sis tseem muaj kev pheej hmoo ntawm kev tsiv teb tsaws thiab kev kis kab mob (ntshiab vapor systems!)
2. Kev ntsuas kom ntsej muag liab
Cov xim liab xeb tshwm sim uas tshwm sim hauv cov tshuab dej tshuaj yog tsim los ntawm kev sib sau ntawm cov khoom me me ntawm cov khoom siv hlau nplua nuj ntawm cov phab ntsa sab hauv ntawm lub cev thiab yog cov khoom ntawm oxidative corrosion ntawm stainless hlau. Cov tsoos austenitic stainless hlau tsis tiv taus kev ntxhov siab corrosion, chloride nres thiab tshwj xeeb tshaj yog sulphide cracking, txwv lawv daim ntawv thov hauv ntau qhov chaw. Yuav kom daws tau qhov teeb meem no, nws yog ib qho tsim nyog yuav tsum tau nrhiav cov ntaub ntawv uas tiv taus corrosion.
Tantalum feem ntau pom nyob rau hauv tantalite thiab yog symbiotic nrog niobium. Tantalum yog me ntsis nyuaj, ductile thiab tuaj yeem kos rau hauv nyias foils hauv daim ntawv ntawm filaments. Nws coefficient ntawm thermal expansion yog tsawg heev. Tantalum muaj cov tshuaj zoo heev thiab tiv taus corrosion, tsis hnov mob nrog hydrochloric acid, concentrated nitric acid lossis aqua regia, ob qho tib si nyob rau hauv txias thiab kub. Nws tuaj yeem siv los ua cov hlab ntsha evaporating, thiab lwm yam. Nws tuaj yeem siv los ua cov khoom siv hluav taws xob rau cov raj hluav taws xob, cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob electrolytic capacitors. Nws kuj yog siv rau hauv cov tshuaj los ua cov ntawv nyias lossis cov xov los kho cov ntaub so ntswg puas. Txawm hais tias tantalum muaj zog tiv taus corrosion, nws tsis kam tiv thaiv corrosion yog vim kev tsim cov yeeb yaj kiab ruaj khov ntawm tantalum pentoxide (Ta2O5) ntawm nws qhov chaw. Nws yog dav siv los ua cov khoom siv cua sov hauv cov dav hlau, foob pob hluav taws thiab lwm yam kev lag luam uas yuav tsum muaj cov khoom siv muaj zog. Tsis tas li ntawd, tantalum hlau muaj lub cev zoo thiab txhua yam khoom zoo thiab biocompatibility zoo, ua rau nws muaj lwm yam khoom siv tshiab tom qab titanium, thiab tau siv dav hauv kev kho mob xws li kev cog lus ntawm qhov ncauj, kev kho mob femoral taub hau necrosis, coronary artery stent placement, artificial acetabular. prosthesis placement thiab phais suture ntau lawm.
Tantalum yog kev lag luam lees paub cov khoom siv uas tiv taus corrosion, abrasion thiab kub kub thiab tuaj yeem siv rau ntau qhov chaw corrosive. Yog li ntawd, Tantalum tuaj yeem siv los tiv thaiv corrosion ntawm workpieces dhau sijhawm.
Raws li tantalum hlau tsis tshua muaj thiab kim nyob rau hauv lub ntiaj teb, nws yog feem ntau siv nyob rau hauv high-sophisticated industries xws li aerospace, hluav taws xob cov cuab yeej thiab biomedicine, thiab nws yog unrealistic siv ntshiab tantalum hlau ua raw khoom rau industrial cov khoom.
Lub nto alloy npaj los ntawm tantalum vapor deposition tshuab tsim los ntawm Yusheng Metals muaj lub cev muaj zog ntawm tantalum hlau, uas tuaj yeem txhim kho cov khoom siv ntawm lub substrate, nrog rau zoo heev deformation thiab khoov muaj peev xwm thiab unparalleled tsis kam mus corrosion, kub thiab siab. , ua qhov kev xaiv zoo tshaj plaws rau kev ua haujlwm hnyav. Yusheng Hlau tau siv cov thev naus laus zis no txhawm rau ua tiav lub tsho tantalum rau ntau yam khoom lag luam hauv ntau qhov kev lag luam, muab peb cov neeg siv khoom nrog kev ua haujlwm siab thiab cov nqi qis.
Txhawm rau txo qhov kev pheej hmoo ntawm xeb liab hauv cov tshuaj siv tshuaj, cov tuam txhab yuav tsum tau txais kev tswj hwm lub tswv yim "zoo los ntawm kev tsim" thiab tswj cov qauv tsim los ntawm qhov chaw. Ntxiv nrog rau kev txhim kho cov txheej txheem ntau lawm, kev xaiv cov khoom siv rau cov khoom siv yog qhov tseem ceeb tshwj xeeb.
Qhov tshwm sim ntawm tantalum nto alloy thev naus laus zis tau muab lub tswv yim zoo rau kev daws qhov tshwm sim liab xeb hauv kev lag luam kws tshuaj. Lub tantalum plating ntawm zoo tib yam stainless hlau workpieces muab lub workpieces lub corrosion kuj ntawm ntshiab tantalum khoom, siv lub superb corrosion kuj ntawm tantalum hlau los tiv thaiv cov khoom siv, txo cov hlau xeb, purify industrial systems, txuag nqi thiab cov txiaj ntsim tuam txhab uas muag.
