Qhov Tseeb Tom Qab Titanium Tube Chemical Inertness: Yuav Ua Li Cas Ib Yam Khoom Siv Tes Ua Haujlwm Ntau Pua Cov Kua Corrosive

Hauv cov chaw tsim tshuaj lom neeg, cov chaw ua haujlwm tshuaj, thiab cov chaw ua haujlwm hauv hiav txwv, cov kws ua haujlwm engineers ntsib teeb meem tas mus li: cov kav dej ua los ntawm cov khoom sib txawv yog qhov yuav tsum tau rau ntau yam khoom sib txawv - ib qib rau hydrochloric acid, lwm qib rau nitric acid, thiab lwm qib rau brine. Ib qho kev sib dhos ua tiav ntawm ib lub Hoobkas xaus nrog kev sib xyaw ua ke ntawm cov khoom siv yeeb nkab, ua rau muaj kev yuav khoom nyuaj, cov khoom muag ntau heev thiab kev tswj cov khoom siv tsis yooj yim.

Lub sijhawm los txog ntawm Titanium Cov Raj tau muab ib qho kev daws teeb meem ze rau txhua tus rau qhov teeb meem no.

I. Qhov Zais Cia rau Kev Tsis Muaj Tshuaj Lom Zem: Ib Lub Txheej Txheem Tiv Thaiv Kho Tus Kheej Tsuas Yog 5 Nanometers Tuab

Titanium tiv taus ntau pua yam khoom siv corrosive vim yog ib zaj duab xis titanium dioxide (TiO₂) oxide nyias nyias uas tsuas yog 5 txog 20 nanometers ntawm nws qhov chaw.

Titanium yog ib hom hlau uas muaj zog heev, uas yuav ua rau nws yooj yim raug xeb. Qhov txawv txav yog tias nws cov tshuaj tiv thaiv siab ua haujlwm rau nws qhov zoo: thaum raug cua lossis cov kua uas muaj oxygen, ib zaj duab xis oxide uas ntom heev, nplaum zoo thiab tsis muaj zog hauv tshuaj tam sim ntawd tsim rau ntawm nws qhov chaw, tiv thaiv tag nrho cov titanium substrate los ntawm kev xeb.

Qhov tseem ceeb tshaj plaws yog lub peev xwm kho nws tus kheej ntawm zaj duab xis. Yog tias kev txhuam los yog kev tawm tsam tshuaj lom neeg ua rau lub txheej tiv thaiv puas tsuaj, cov titanium substrate uas raug tso tawm tam sim ntawd rov ua oxidizes thaum kov cov kua dej ua haujlwm kom rov tsim cov txheej tiv thaiv tshiab. Cov zaj duab xis oxide no khaws nws cov khoom tiv thaiv ntawm qhov kub txog li 315 ° C.

Tus cwj pwm tseem ceeb no yog qhov ua rau cov raj titanium xa cov kev ua tau zoo txhim khu kev qha thoob plaws ntau qhov chaw pabcuam.

II. Kev Ua Haujlwm ntawm Titanium Tubes hla Yim Pawg Tseem Ceeb ntawm Media

1. Cov Acids Oxidizing (Nitric Acid, Chromic Acid, thiab lwm yam)

Titanium ua pov thawj tias nws tiv taus tau zoo heev hauv cov chaw oxidizing acid. Cov khoom siv hloov pauv cua sov Titanium tau ua haujlwm tau ntau xyoo yam tsis pom kev xeb hauv 60% nitric acid ntawm kwv yees li 193 ° C. Ntawm qhov kub thiab txias nrog 50% nitric acid, tus nqi xeb txhua xyoo ntawm cov raj titanium yog tsawg dua 0.01 hli, thaum 316L stainless hlau raug kev txom nyem tus nqi xeb siab dua 0.1 hli. Titanium tswj lub neej kev pabcuam ruaj khov hauv nitric acid ntawm txhua qhov kev sib xyaw los ntawm qhov kub thiab txias hauv chav tsev mus txog rau qhov kub npau.

2. Txo Cov Acids (Hydrochloric Acid, Sulfuric Acid, Phosphoric Acid)

Pawg no sawv cev rau qhov kev txwv tsis pub ua haujlwm tseem ceeb ntawm titanium, tab sis titanium tseem siv tau nrog kev xaiv qib zoo. Qib TA2 titanium ntshiab uas muag hauv khw muag khoom muab kev pabcuam ruaj khov mus sij hawm ntev hauv sulfuric acid ntawm qhov concentration ≤50% thiab chav sov dilute hydrochloric acid. Txawm li cas los xij, qhov kub siab lossis cov acid concentration siab dua yuav tsum tau hloov kho mus rau Qib TA10 (alloyed nrog molybdenum thiab nickel) lossis Qib TA9 (palladium-alloyed). TA10 muaj kev tiv thaiv corrosion zoo dua li TA2 hauv kev txo cov xov xwm, tshwj xeeb tshaj yog kev tiv thaiv zoo rau crevice corrosion.

3. Cov Tshuaj Chloride (Dej Hiav Txwv, Brine, Cov Pa Chlorine Uas Ntub Dej)

Cov chaw muaj chloride yog cov chaw siv tseem ceeb ntawm titanium. Hauv 3.5% sodium chloride kua, tus nqi xeb txhua xyoo ntawm cov raj titanium poob qis dua 0.01 hli, poob qis dua 0.001 hli ib xyoos hauv dej hiav txwv uas ntws tas li. Nws qhov kev tiv thaiv rau cov tshuaj chlorine ntub dej kub siab kuj zoo kawg nkaus: tus nqi xeb tsuas yog 0.000565 hli / xyoo hauv dej chlorine ntawm qhov kub thiab txias, nce mus txog tsuas yog 0.00431 hli / xyoo ntawm 80 ° C. Rau 95% chlorine ntub dej ntawm chav tsev kub, tus nqi xeb qis li 0.00096 hli / xyoo.

4. Cov Tshuaj Alkaline

Titanium ua tau zoo tiv thaiv cov alkalis uas tsis muaj zog. Cov raj titanium ntshiab tiv taus 30% sodium hydroxide kua hauv qab 100 ° C, tab sis qhia tsis zoo tiv taus cov alkaline kub thiab muaj zog heev.

5. Cov kua qaub organic

Titanium tiv taus feem ntau cov organic acids thiab siv dav rau kev thauj mus los ntawm cov kav dej xws li formic acid, acetic acid thiab propylene oxide hauv cov haujlwm tshuaj lom neeg. Cov kev zam suav nrog boiling formic acid thiab oxalic acid, uas ua rau ntsuas xeb ntawm titanium.

6. Cov Tshuaj Ntsev Inorganic

Titanium tswj tau qhov corrosion zoo heev hauv feem ntau cov inorganic ntsev tov, nrog kev ua haujlwm ruaj khov hauv cov nruab nrab thiab cov khoom siv txo qis.

7. Dej Ntshiab Kawg & Cov Txheej Txheem Ua Kom Huv Si

Titanium lub zog uas tsis muaj cov hlau ion leaching ua rau nws yog cov khoom siv zoo tshaj plaws rau kev tsim tshuaj thiab kev tsim dej ntshiab heev. Nws tsis muaj tshuaj lom thiab qhia tau tias nws sib haum xeeb zoo nrog tib neeg cov nqaij thiab cov ntshav.

8. Nws Tus Yeeb Ncuab Ib Leeg: Hydrofluoric Acid

Cov kua qaub hydrofluoric ua rau muaj xeb hnyav rau titanium txawm tias muaj qhov sib xyaw lossis kub npaum li cas los xij. Yuav tsum ceev faj ntxiv thaum siv titanium rau hauv qhov kub thiab txias, muaj cov kua qaub hydrochloric acid thiab sulfuric acid ntau heev.

Daim Ntawv Qhia Txog Kev Tiv Thaiv Kev Sib Kis rau Titanium Tubes hauv Ntau Yam Xov Xwm

Cov Lus Nug Feem Ntau

Q1: Cov raj titanium puas tuaj yeem tiv taus txhua yam corrosive media thoob ntiaj teb?

Ib: Tsis yog. Titanium muaj kev ua tau zoo tshaj plaws hauv cov tshuaj oxidizing, cov tshuaj chloride, feem ntau cov organic acids thiab dilute alkalis, tab sis nws tsis haum rau hydrofluoric acid. Kev ntsuam xyuas nruj yog qhov yuav tsum tau ua rau cov tshuaj hydrochloric thiab sulfuric acid kub, muaj zog heev. Nws "kev sib raug zoo thoob ntiaj teb" yog qhov zoo dua: piv rau cov hlau tsis xeb thiab tooj liab alloys, titanium npog ntau yam tshuaj, tab sis cov khoom siv science ciam teb yuav tsum tau hwm.

Q2: Ntawm TA2 thiab TC4 titanium raj, uas muaj kev tiv thaiv corrosion zoo dua?

Ib: TA2 muaj kev tiv thaiv xeb zoo dua. Txawm hais tias TC4 muaj lub zog tensile siab heev (ntau dua ob npaug ntawm TA2), nws qhov kev tiv thaiv xeb dav dav yog qhov tsis zoo. Rau cov chaw muaj kev xeb hnyav xws li cov kua qaub hydrochloric uas muaj concentrated, TC4 yuav tsum tau siv nrog kev ceev faj heev lossis ua ke nrog cov txheej tiv thaiv xeb. Cov lus qhia xaiv: muab qhov tseem ceeb rau titanium ntshiab rau kev tiv thaiv xeb; xaiv Titanium Alloys thaum lub zog kho tshuab yog qhov xav tau tseem ceeb.

Q3: Cov raj titanium puas siv tau rau hauv kev pabcuam hydrochloric acid?

Ib: Siv tau rau hauv qab tej yam kev mob uas tswj tau. TA2 ua haujlwm tau ntev hauv cov kua qaub hydrochloric uas muaj concentration tsawg ntawm qhov kub thiab txias. Qhov kub siab dua lossis cov kua qaub ntau dhau yuav tsum hloov mus rau TA10 lossis TA9. Kev kuaj xeb uas phim cov xwm txheej ua haujlwm tiag tiag (kev concentration, kub, cov pa oxygen) yog qhov pom zoo kom paub tseeb.

Q4: Puas yog khawb ntawm cov titanium raj nplaim yuav ua rau xeb?

Ib: Titanium yuav tsis xeb, tab sis qhov puas tsuaj ntawm qhov chaw yuav tsum tau saib xyuas thaum lub sijhawm teeb tsa thiab ua haujlwm. Cov zaj duab xis titanium oxide muaj cov haujlwm kho nws tus kheej: thaum puas tsuaj hauv zos, cov titanium substrate uas raug tso tawm tam sim ntawd rov ua dua thaum kov cov kua uas muaj oxygen los kho dua tshiab ib qho kev tiv thaiv. Txawm li cas los xij, kev ua qias tuaj ntawm hlau ua rau muaj kev pheej hmoo loj heev: cov hlau tso rau ntawm cov chaw titanium cuam tshuam kev sib npaug ntawm cov zaj duab xis oxide, tsim cov channel rau hydrogen permeation thiab ua rau hydrogen embrittlement. Yuav tsum muaj kev ntsuas nruj kom tsis txhob kov cov cuab yeej ferrous thiab cov chaw titanium tube thaum lub sijhawm ua haujlwm thiab kev teeb tsa.

Xaus lus

Cov raj titanium tau txais lawv lub koob npe nrov ua cov khoom siv kav dej kev lag luam thoob plaws tsis yog los ntawm kev thov kev lag luam, tab sis cov tshuaj lom neeg tsis muaj zog xa los ntawm lawv cov yeeb yaj kiab oxide tiv thaiv 5-nanometer. Ib yam khoom siv sib xws nrog ntau pua cov kua dej corrosive tsis yog lus dab neeg kev lag luam - nws yog pov thawj cov ntaub ntawv tshawb fawb.

ProX Hlau tsis yog tsuas yog muab cov raj titanium xwb, tab sis kuj tseem muaj cov kev pabcuam sib phim peb-seem uas suav nrog hom xov xwm, qib alloy thiab cov xwm txheej ua haujlwm. Peb pom zoo kom cov qib titanium zoo tshaj plaws thiab cov lus qhia tshwj xeeb uas tsim rau koj cov txheej txheem tshwj xeeb, uas tso cai rau koj siv tag nrho cov txiaj ntsig ntawm kev tsis muaj zog ntawm cov tshuaj lom neeg ntawm titanium hauv koj lub cev. Kev ua tau zoo thoob ntiaj teb tiag tiag tsis yog nyob ntawm ib qib yeeb nkab rau txhua daim ntawv thov, tab sis phim cov raj titanium zoo meej rau txhua qhov chaw corrosive tshwj xeeb.