Kev vam meej ntawm GR12 Titanium Alloy hauv Ammonium Chloride Evaporator

Muaj ntshiab titanium exhibits zoo heev corrosion kuj nyob rau hauv chav tsev kub ammonium chloride tov. Txawm li cas los xij, nws muaj kev pheej hmoo ntawm crevice corrosion nyob rau hauv kub thiab siab concentration ammonium chloride tov. Cov nroj tsuag tshuaj nyob rau hauv Suav teb siv ammonium chloride evaporator ua los ntawm cov ntshiab titanium. Tom qab tsuas yog 8 lub hlis ntawm kev ua haujlwm, nws yuav tsum tau muab pov tseg vim muaj corrosion hnyav heev. Qhov no yog lub evaporator loj nrog txoj kab uas hla ntawm 1000mm thiab ntev ntawm 5000mm. Cov ammonium chloride concentration yog 15% -20%, kev khiav hauj lwm kub yog 110 degree -120 degree, pH tus nqi nyob nruab nrab ntawm 4.0-6.0, thiab cov khoom kawg yog ammonium chloride crystals .

Cov ntawv raj, lub hnab ntim thiab lub plhaub ntawm cov evaporator yog tag nrho ua los ntawm GR2 industrial ntshiab titanium, thiab cov ntsiab lus impurity yog nruj me ntsis tswj nyob rau hauv ib tug tej yam ntau yam. Txawm li cas los xij, nyob rau hauv tsawg dua 8 lub hlis ntawm kev ua haujlwm, ntug ntawm cov ntawv raj ntawm qhov qis kawg ntawm lub nruab nrab cua sov chamber thiab cov vuam ntawm kev sib txuas ntawm cov yeeb nkab thiab cov ntawv raj tau corroded loj heev. Tag nrho sab hauv sab saum toj ntawm lub cev vertebral qis kuj raug kev txhim kho corrosion, thiab kev nkag mus hauv zos tau tshwm sim, nrog corrosion pits tob li 6mm thiab 80mm -100mm wide. Qhov tseeb no qhia tau hais tias kev lag luam ntshiab titanium tsis haum rau high-temperature thiab high-concentration ammonium chloride tov, thiab hnyav crevice corrosion yuav tshwm sim.

Txhawm rau txhawm rau tshawb nrhiav qhov ua rau corrosion, cov kws tshaj lij tau ua metallographic thiab scanning electron microscopy tsom rau ntawm qhov chaw corroded. Cov txiaj ntsig ntawm metallographic tsom xam pom tau tias cov qauv ntawm cov khoom corroded tsis hloov pauv txawv txav, thiab tsis muaj hydrides tau pom nrog crevice corrosion. Kev tshuaj ntsuam xyuas electron microscopy pom tias qhov chaw corroded yog honeycomb-zoo li tus, tab sis tsis muaj kab nrib pleb. Element zog spectrum tsom xam pom tau hais tias lub corrosion cheeb tsam muaj ib tug loj npaum li cas ntawm chlorine, thiab titanium nyob rau hauv lub corrosion cheeb tsam pom tseeb absorbed hydrogen. Cov txiaj ntsig no qhia tau hais tias cov khoom siv corrosion muaj ntau cov tshuaj chloride ions, uas qhia txog cov yam ntxwv ntawm kev ua haujlwm corrosion.

Txhawm rau kho qhov teeb meem corrosion thiab ua kom lub neej ua haujlwm ntawm cov cuab yeej siv, lawv tau siv ntau yam kev ntsuas. Lawv thawj zaug tshem cov deposits thiab ntsia ib tug titanium tshuaj tsuag yeeb nkab nyob rau hauv lub qis raj phaj kom txo scaling. Nyob rau tib lub sijhawm, lawv kuj tau txhim kho cov txheej txheem rau kev sib txuas ntawm flange ntawm lub khob hliav qab, nce qhov ntev ntawm qhov kev hloov pauv thiab tsim lub kaum sab xis loj hloov pauv kom tshem tawm cov deposits thiab kua tsub zuj zuj, thiab zam cov ces kaum tuag thiab pits ntawm kua. stagnation. Cov kev txhim kho no tau txhim kho cov kua dej ntawm cov tshuaj ammonium chloride, kom cov cuab yeej tsis corrode mus txog 16 lub hlis ntawm kev ua haujlwm, thiab kev pabcuam lub neej tau nce ob npaug piv nrog cov khoom qub.

Txawm li cas los xij, rau kev daws teeb meem ntau dua, cov kws tshaj lij sivGR12 titanium alloylos tsim ammonium chloride evaporators. GR12 titanium alloy yog Ti-0.3Mo-0.8Ni alloy, thiab nws cov ntsiab lus thiab impurity cov ntsiab lus raug tswj nruj me ntsis. Kev xyaum ua haujlwm qhia tau hais tias cov evaporators ua los ntawm Qib 12 titanium alloy muaj kev nyab xeeb thiab txhim khu kev qha nyob rau hauv high-temperature thiab high-concentration ammonium chloride tov, thiab tsis muaj crevice corrosion. Txawm hais tias tus nqi ntawm TA10 titanium alloy khoom yog me ntsis siab dua li ntawm cov ntshiab titanium, nws cov kev pab cuam lub neej yog ntau tshaj 15 npaug ntev dua li ntawm cov ntshiab titanium. Yog li ntawd, los ntawm qhov kev xav ntawm kev lag luam, nws yog qhov zoo heev los siv TA10 titanium alloy los tsim ammonium chloride evaporators.

Hauv cov ntsiab lus, daim ntawv thov ntawm Qib 12 titanium alloy hauv ammonium chloride evaporator tau ua tiav zoo kawg nkaus. Nws tsis tsuas yog daws qhov teeb meem ntawm crevice corrosion ntawm industrial ntshiab titanium nyob rau hauv high-temperature thiab high-concentration ammonium chloride tov, tab sis kuj ho txhim kho lub neej kev pab cuam thiab nyiaj txiag txiaj ntsim ntawm cov khoom. Nrog kev txhim kho txuas ntxiv ntawm kev tshawb fawb thiab thev naus laus zis, TA10 titanium alloy yuav tsum tau siv dav thiab nce qib hauv ntau qhov chaw.