Kev ntxhov siab corrosion tsoo kev tiv thaiv kev tiv thaiv nyob rau hauv this sib txuas ntawm tooj dag li qub
Taw qhia rau kev ntxhov siab corrosion cracking (SCC)
Kev ntxhov siab corrosion cracking (SCC) yog qhov tseem ceeb tsis ua hauj lwm hom hauv cov hlau sib txawv nthuav tawm cov kev ntxhov siab thiab kev xeb kev xeb. Nyob rau hauv tooj dag li qub, tshwj xeeb tshaj yog cov siv hauv kav dej, roj av, thiab kev lag luam,SCC feem ntau cuam tshuam cov khoom sib txuasCov. Cov xov, nyob rau hauv ib qho kev ntxhov siab tas li kev ntxhov siab thiab nthuav tawm rau noo noo lossis tshuaj lom neeg, dhau los ua neeg tsis muaj zog dhau sijhawm. Kev sib xyaw ntawmtensile load, corrosive cov neeg sawv cev, thiab cov khoom siv tauUa rau SCC ib qho kev txhawj xeeb hauv kev tswj hwm kev nyab xeeb thiab kev ntev ntawm tooj dag valve lub rooj sibtawm.
Vim li cas thiaj threed kev sib txuas yog qhov tshwj xeeb
Threaded sib txuas hauv tooj dag li qub yog cov cheeb tsam ntawm kev ntxhov siab. Lub sij hawm zawm, nruab cov tegente qhia cov khoom seem uas muaj kev ntxhov siab ntawm cov xov. Hauv kev pabcuam, kev co, sab hauv siab, thiab thermal cycling ntxiv ntau dua kev ntxhov siab. Thaum cov kev sib txuas no raug rau cov dej ib puag ncig, zoo li cov dej chlorinated lossis ammonia-muaj cua,micro-nrib pleb yuav pibntawm lub hauv paus xov. Sij hawm dhau los, cov kab nrib me me no qhia txog kev hais tawm, ua rau kom muaj kev tsis ua haujlwm sai thiab kev ua tsis tiav ntawm lub valve.
Metallurgical tau ntxim nyiam ntawm tooj
Tooj dag, tshwj xeeb tshaj yog alpha-beta tooj nrog ntau dua 15% zinc, yog paub tias yuav raug rauDEZINCICATIONthiabKev ntxhov siab corrosionCov. Qhov no yog qhov tseeb tshwj xeeb rau cov xim txhuas nrog cov ntsiab lus coj, uas yuav muaj qhov tsis sib xws micrtructures lossis suav nrog. Thaum raug rau kev tawm tsam kev tawm tsam xws li Chlorides lossis cov ib puag ncig alkaline, zinc tuaj yeem xaiv cov qauv. Yog tias cov cwj pwm metallurgical coincide coiers kev ntxhov siab ntawm cov xov, SCC muaj kev pheej hmoo txaus ntshai. Yog li ntawd, xaivSCC-resistant tooj dag alloys, xws li arsenic-inhibited lossis cov brasses tsawg, yog qhov tseem ceeb hauv kev thov tseem ceeb.
Cov teeb meem ib puag ncig ua rau SCC
Ntau cov xwm txheej ib puag ncig tuaj yeem ua kom nrawm scc hauv xov kab sib txuas:
Siab vaumlossisKev ya ua cov paabnyob ib ncig ntawm cov ntawv ntaus pob qij txha.
Muaj cov chlorides, Sulfides, lossis ammonia tebchaw.
Residual fluxlos ntawm soldering tsis ntxuav kom huv.
Kev hloov pauv kubuas ua rau cua sov nthuav dav thiab mertaction.
Hauv cov tshuab HVAC, piv txwv, cov hws, feem ntau ua nyob hauv cov li qub, thaum nyob hauv dej, dej chlorinated yog ib qho tas mus li. Kev txheeb xyuas thiab txo qis kev pheej hmoo ntawm ib puag ncig no yog qhov tseem ceeb ntawm SCC tiv thaiv.
Kev tsim qauv thiab kev sib dhos ua ke rau kev tiv thaiv
Kev tiv thaiv scc pib ntawm tus qauv tsim. Cov tuam txhab tsim khoom tuaj yeem ua cov tswv cuab hauv qab no:
Zam kev ua kom ntse lossis tsis yog cov lus tsim los txo kev ntxhov siab.
Kev sivRolled xovHloov chaw txiav xov los txo cov micro-nrum ib qho.
Xaiv kom raugXov sealantslossis gaskets uas tiv thaiv kev ua dej noo.
Txwv tsis pub lub zog thov kom tsis txhob muaj kev ntxhov siab dhau kev ntxhov siab.
Tsis tas li ntawd, kom ntseeg tau ib txheej txheem huv, pub dawb los ntawm kev thaj chaw uas muaj kev xeb, yog qhov tseem ceeb. Thaum soldering nyob ze cov ntawv sib txuas, cov kws tshaj lij yuav tsumUa kom huv si tshem tawm Fluxthiab tsis txhob overheating.
Cov khoom siv xaiv thiab tiv thaiv cov txheej txheem tiv thaiv
Xaiv txoj cai tooj dag dag alloy yog ib qho kev ntsuas ua tau zoo tshaj plaws los tiv thaiv SCC. Alloys xws liCw602n (dezincification-resistant tooj dag)lossisDzr toojyog tsim rau ib cheeb tsam ib puag ncig mus rau scc. Cov alloys muaj me me ntawm arsenic lossis tin, uas inhibit zinc leaching thiab nce rau intergranular corrosion.
Nyob rau hauv cov neeg nyob hauv ib puag ncig, engineers kuj tseem yuav siv tau:
Epoxy Txheej Txheemntawm xov.
Kev Kho Mob Hla DhauTxhawm rau txo cov refarity reactivity.
Yas Los Yog Stainless-Steel Adaptersnruab nrab ntawm brass thiab dissimilar me me.
Xws li kev ntsuas ua raws li kev thaiv kev, txo cov hlau raug rau cov neeg sawv cev corrosive.
Soj Ntsuam, Kev Saib Xyuas, thiab Txij Nkawm
Txawm nrog tsim nyog tsim qauv thiab cov khoom siv,Kev kuaj xyuas tsis tu ncuaYog ib qho tseem ceeb rau kev kuaj pom ntxov ntawm SCC. Txij Nkawm Muaj Kev Lom Zem yuav tsum muaj:
Pom pom kev kuaj xyuas rau discoloration, tawg, lossis xau ntawm xov.
Tas torque kuaj kom ntsuas xoob vim yog tawg kev loj hlob.
Kev siv ntawmZe FleetrantlossisUltrasonic kuajRau qhov tseem ceeb li qub.
Hauv kev ua lag luam lossis cov kav dej kav dej, tshuaj xyuas txhua12 txog 24 hlistuaj yeem tiv thaiv kev ua haujlwm tsis tiav. Cov neeg xav tias cov neeg phem yuav tsum tau hloov sai kom zam dhau qhov kev phom sij dav dav.
Kev Tshawb Nrhiav Kev Kawm thiab Kev Lag Luam Cov Lus Taw Qhia
Ob peb kis kev kawm txog qhov tseem ceeb ntawm SCC kev tiv thaiv. Nyob rau hauv ib lub phiaj xwm dej hauv nroog, ntau brass li qub ua tsis tiav vim muaj dej chlorinated thiab dhau-torqued nruab. Tom qab hloov mus rauDzr toojthiab qhia kev teeb tsa cov torque txwv, qhov tsis ua hauj lwm tus nqi poob los ntawm ntau dua 90%.
Cov koom haum kev lag luam xws li covMiskas Dej Ua Haujlwm Koom Tes (AWWA)thiabASMEPom zoo cov ntaub ntawv SCC-resistant thiab kev daws teeb meem kev cuam tshuam rau kev sib cais hauv cov pob qij txha ntaus pob. Ua raws li lawv cov qauv tsis tsuas yog ncua kev pabcuam lub neej tab sis kuj ua kom tauKev Nyab Xeeb, Ua raws li, thiab nqi-efficiencynyob rau hauv loj-teev sib sau.
Tag
Kev ntxhov siab corrosion tawg nyob rau hauv txoj xov txuas ntawm tooj dag li qub yog ib qho tseem ceeb tab sis tiv thaiv teeb meem. Los ntawm kev nkag siab txog cov lus sib xyaw ua ke - suav nrog cov khoom muaj pes tsawg leeg, kev siv tshuab, kev ntxhov siab, thiab cov kws ua choj thiab cov kws tshaj lij tuaj yeem tau txais aCov tswv yim tiv thaiv kev dav davCov. Qhov no suav nrog kev xaiv cov ntaub ntawv tsim nyog zoo li Dzr tooj liab, thov cov txheej txheem tiv thaiv, siv cov txheej txheem sib dhos, thiab ua kom sib dhos. Thaum siv siv kom raug, cov kev ntsuas no kom muajKev ntseeg tau ntev thiab kev nyab xeebntawm tooj dag li qub nyob rau hauv cov tshuab tseem ceeb.
Hu rau yog hais tias
Xov Tooj:+86 15088288323
