Dab tsi yog Qhov Zoo Ntawm Titanium Tubes hauv Kev Siv Hluav Taws Xob?

Los ntawm ntau qhov kev sim thiab daim ntawv thov piv txwv, nws tau raug pov thawj tias daim ntawv thov ntawm titanium raj hauv fais fab nroj tsuag condensers muaj cov cuab yeej zoo thiab kev lag luam. Los ntawm kev pom kev lag luam, noj cov nqi ntawm cov raj xa dej (kwv yees li 50000 condenser raj) rau 1000mw condenser hauv Nyij Pooj xyoo 1983 ua piv txwv, raws li 40 xyoo kev pab cuam lub neej ntawm lub condenser, qhov nruab nrab txhua xyoo to ntawm txhuas daj raj yog 40 xyoo. . Peb qhov teeb meem uas yuav tsum tau hais txog thaum siv titanium raj rau cov chaw tsim hluav taws xob:
1. Cov teeb meem corrosion
Seawater yog siv los ua dej txias rau condensers nyob rau hauv ntug dej hiav txwv fais fab nroj tsuag. Vim tias muaj ntau cov sediment, tshem tawm cov khib nyiab, cov kab mob hauv hiav txwv, thiab ntau yam corrosive hauv dej hiav txwv, qhov xwm txheej yuav hnyav dua nyob rau hauv cov dej brackish uas dej hiav txwv thiab dej ntws sib hloov. Cov txheej txheem corrosion ntawm cov tsoos tooj liab platform hlau kav muaj xws li tag nrho corrosion (uniform corrosion), erosion, kev nyuaj siab corrosion, thiab lwm yam. Titanium muaj zoo heev corrosion kuj. Titanium tube condensers tshem tawm cov dej hiav txwv los ntawm kev sib tsoo vim corrosion, tab sis lawv muaj kev tiv thaiv corrosion zoo. Tsis zoo li tooj liab alloy tubes, uas tsim cov tshuaj lom rau ntawm qhov chaw, cov phab ntsa sab hauv ntawm titanium hlab yog nquag mus txuas ntawm cov kab mob hauv hiav txwv, uas cuam tshuam rau kev hloov hluav taws xob thiab yuav tsum tau siv cov khoom siv tu.
2. Hydrogen absorption teeb meem
Txawm hais tias titanium muaj ntom passivation zaj duab xis ntawm nws cov nplaim thiab yog cov corrosion-resistant nyob rau hauv ntau cov xov xwm tseem ceeb heev, nws muaj kev sib raug zoo rau hydrogen. Yooj yim heev rau nqus hydrogen. Nws tshwm sim ntawm chav tsev kub thiab sai sai absorbs hydrogen ntawm qhov kub thiab txias (xws li 100 degree ). Cov khoom melting txwv ntawm hydrogen nyob rau hauv titanium yog heev me me (txog 20ppm), thiab tshaj qhov txwv, hydrides (TtH2) yuav precipitate rau saum npoo ntawm titanium. Raws li qhov chaw TiH2 cov ntsiab lus nce, qhov cuam tshuam tus nqi thiab elongation ntawm titanium sai sai poob ntawm 4j. Tsis tas li ntawd, thaum lub sij hawm kho dua tshiab ntawm lub qub chav tsev, vim yog siv tooj liab alloy rau lub raj phaj thiab titanium rau lub condenser raj, cathodic tiv thaiv cov cuab yeej yuav tsum tau los tiv thaiv electrochemical corrosion. Piv txwv li, lub condenser ntawm Hitachi fais fab nroj tsuag yog txias los ntawm seawater, thiab ib tug thermocouple yog tsim los ntawm titanium hlab thiab tooj liab alloy daim hlau. Thaum lub peev xwm tiv thaiv qis dua 0.75V (SCE), qhov hluav taws xob titanium raj kawg absorbs hydrogen gas, thiab cov ntsiab lus hydrogen ncav cuag 650ppm tom qab siv ib xyoos; Yog tias qhov muaj peev xwm yog 0.5-0.75V (SCE), titanium yuav tsis nqus hydrogen ntawm chav tsev kub.
3. Cov teeb meem vibration
Vim qhov zoo corrosion kuj ntawm titanium kav. Titanium solidifiers yuav tsis xau vim corrosion. Txawm li cas los xij, titanium raj yuav puas vim kev co. Txhawm rau kom tsis txhob muaj teeb meem kev vibration ntawm titanium raj, nws yog ib qho tsim nyog los txiav txim siab qhov sib faib qhov sib txawv thaum tsim cov khoom thaiv titanium solidifiers. Thaum kho cov qub chav nyob, nws yog ib qho tsim nyog yuav tsum tau xyuas seb qhov kev sib faib qub puas haum.