Kev sim ntau thiab cov qauv siv tau ua kom pom qhov tseem ceeb ntawm kev ua haujlwm thiab kev lag luam zoo ntawmtitanium tubesnyob rau hauv lub zog cog condenser. Kev lag luam, noj lub raj txoj kab uas hla ntawm tus nqi ntawm 1000MW condenser nuclear fais fab hauv Nyij Pooj (kwv yees li 50,000 condenser raj) ua piv txwv, thiab xam raws li 40- xyoo condenser lifespan, qhov nruab nrab txhua xyoo to ntawm txhuas-tooj liab tubes yog 10, thaum tsis muaj titanium ntau tshaj 4 xyoo. Daim ntawv no feem ntau tham txog cov teeb meem uas tau ntsib nyob rau hauv daim ntawv thov ntawm titanium raj hauv fais fab nroj tsuag.
1. Teeb meem Corrosion
Seawater yog siv los ua dej txias rau condensers nyob rau hauv ntug dej hiav txwv fais fab nroj tsuag. Vim 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 hnyav dua nyob rau hauv cov dej me ntsis uas dej hiav txwv thiab dej ntws sib hloov. Cov txheej txheem kev txhim kho cov txheej txheem rau tooj liab platform hlau kav muaj xws li tag nrho corrosion (uniform corrosion), yaig, thiab kev ntxhov siab corrosion. Titanium, nrog nws cov kev tiv thaiv zoo heev, tshem tawm cov dej ntws tawm hauv dej hiav txwv los ntawm corrosion ntawm titanium raj condensers. Txawm li cas los xij, vim tias cov raj titanium tsis zoo li corrosion-resistant li tooj liab hlau, cov tshuaj lom tuaj yeem tsim rau ntawm lawv qhov chaw. Yog li ntawd, cov kab mob marine tau yooj yim ua raws li cov phab ntsa sab hauv ntawm titanium raj, cuam tshuam rau kev hloov hluav taws xob. Yog li, cov khoom siv tu kom tsim nyog yuav tsum tau ua.
2. Hydrogen Absorption: Although titanium has a dense passivation film on its surface, providing high corrosion resistance in many highly corrosive media, it has a very high affinity for hydrogen. Nws yooj yim absorbs hydrogen. Qhov no tshwm sim ntawm chav tsev kub thiab ceev ceev ntawm qhov kub thiab txias (piv txwv li, 100℃). Cov khoom solubility txwv ntawm hydrogen hauv titanium yog me me (kwv yees li 20 ppm). Yog tias qhov kev txwv no dhau lawm, hydrides (tth2) yuav ua rau nag lossis daus ntawm titanium nto. Nrog rau cov ntsiab lus ntawm titanium saum npoo, qhov cuam tshuam tus nqi thiab elongation ntawm titanium txo sai. Tsis tas li ntawd, thaum lub sij hawm retrofitting ntawm cov laus, vim hais tias cov ntawv raj yog ua los ntawm tooj liab alloy thiab cov condenser raj yog ua los ntawm titanium alloy, cathodic tiv thaiv cov cuab yeej yuav tsum tau tiv thaiv electrochemical corrosion. Piv txwv li, cov condensers nyob rau hauv Hitachi fais fab nroj tsuag siv seawater txias, nrog titanium raj ua ke nrog 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, ncav cuag cov ntsiab lus hydrogen ntawm 650 ppm tom qab siv ib xyoos. Yog tias muaj peev xwm yog 0.5 ~ 0.75V (SCE), titanium tsis nqus hydrogen ntawm chav tsev kub.
3. Cov teeb meem kev vibration: Zibo titanium raj muaj corrosion kuj zoo heev. Thaum titanium condensers yuav tsis puas los ntawm corrosion, titanium hlab yuav puas los ntawm kev co. Txhawm rau kom tsis txhob muaj teeb meem kev vibration nrog cov titanium raj, lub diaphragm haum yuav tsum tau txiav txim siab thaum lub sij hawm tsim cov titanium condenser; Thaum lub sij hawm kho dua tshiab, nws yog ib qho tsim nyog yuav tau tshawb xyuas seb qhov sib cais ntawm phab ntsa yog qhov haum rau titanium raj.
Baoji Reliab Metal Materials Co., Ltd
Txawb: 0086 13092900605
Chaw Muag Khoom 1: WhatsApp +8613092900605 (Mr.Gary)
Chaw Muag Khoom 2: +8613092913521(Ms. Sophia)
Chaw nyob: No.35 Baoti Rd, Weibin District, Baoji, Suav
