Puas tuaj yeem 316 Stainless Steel Anti-Corrosion Heating Tubes tuaj yeem tiv taus ntev- Lub Sijhawm raug rau cov tshuaj ntxuav kua qaub?

Hauv ntau qhov kev lag luam, cov tshuab cua sov tsis yog tsuas yog cuam tshuam rau cov txheej txheem kev tshaj tawm, tab sis lawv kuj mus los ntawm kev siv tshuaj tua kab mob tsis tu ncua. Cov tshuaj ntxuav cov kua qaub yog siv dav hauv cov chaw kho dej khib nyiab, cov kab hluav taws xob, cov tshuaj reactors, thiab cov txheej txheem ua zaub mov kom tshem tawm cov pob zeb hauv av, biofilm, lossis nplai. Thaum cov xwm txheej no nyob rau hauv qhov chaw, lub peev xwm ntawm 316 stainless hlau los tiv thaiv- cov kav dej cua sov kom sawv ntsug ntev - lub sij hawm raug rau cov tshuaj ntxuav cov kua qaub los ua ib qho tseem ceeb ntawm kev ntseeg siab.

316 stainless hlau yog ib qho kev xaiv nrov rau cov xwm txheej corrosive vim nws cov alloy muaj pes tsawg leeg yog sib npaug. Nws muaj li ntawm 16-18% chromium, 10-14% nickel, thiab 2-3% molybdenum, uas ua rau nws tiv taus pitting thiab crevice corrosion, tshwj xeeb tshaj yog nyob rau hauv cov chaw uas muaj chloride. Ntxiv molybdenum ua rau passive chromium oxide txheej ruaj khov dua. Zaj duab xis no yog lub ntsiab tiv thaiv corrosion. Tab sis qhov ua tau zoo ntawm cov txheej tiv thaiv no vam khom ntau yam ntawm cov kua qaub, nws muaj zog npaum li cas, nws kub npaum li cas, thiab ntev npaum li cas nws raug rau nws.


316 stainless hlau cua sov raj feem ntau ua haujlwm tau zoo thaum qhov kub thiab txias tau khaws cia rau hauv qee qhov kev txwv hauv cov kua qaub hauv cov organic acids thiab cov ntsiab lus tsis zoo xws li sulfuric lossis phosphoric acid. Yog tias qhov chaw ua rau me ntsis puas, cov zaj duab xis passive nyob ruaj khov thiab tuaj yeem kho nws tus kheej. Hauv cov xwm txheej no, lub voj voog tu ceev feem ntau tsis tsim cov khoom tsis zoo. Thaum cov kua qaub muaj zog, qhov kub thiab txias, los yog raug siv ua ke, cov teeb meem yuav tshwm sim ntau dua.

Austenitic stainless hlau, xws li 316, muaj lub sijhawm nyuaj nrog hydrochloric acid. Chloride ions tuaj yeem rhuav tshem cov txheej txheem passive thiab pib qhov chaw corrosion txawm nyob rau theem qis. Thaum ntxuav nrog cov kua qaub uas muaj chloride, nws yog ib qho tseem ceeb heev uas yuav tsum tau ua tib zoo saib xyuas cov concentration thiab lub sijhawm sib cuag. Tawm hauv cov cua kub hauv cov kua qaub rau lub sijhawm ntev heev ua rau muaj kev phom sij ntawm pitting corrosion. Pits tsim me ntsis acidic thaj chaw uas ua kom cov txheej txheem nkag mus rau phab ntsa hlau thaum lawv tshwm sim.

Cov kev cuam tshuam no tau muaj zog dua thaum kub nce. Thaum qhov kub thiab txias ntawm cov tshuaj ntxuav tau nce mus, cov nqi ntawm cov tshuaj tiv thaiv nce mus thiab kev ruaj ntseg ntawm cov zaj duab xis passive mus. Corrosion kinetics ceev hauv cov txheej txheem ntxuav, tshwj xeeb tshaj yog cov uas mus saum 60-80 degree. Yog li, thaum koj yuav tsum tau ntxuav nrog cov kua qaub, nws yog qhov zoo tshaj plaws los ua kom qhov kub thiab txias ntawm cov tshuaj thiab lub sijhawm nws nyob rau hauv kev sib cuag nrog cov khoom kom tsawg li sai tau kom tsis txhob muaj kev puas tsuaj. Tom qab ntxuav, tswj cov dej yaug pab coj cov khoom rov qab mus rau qhov nruab nrab thiab pab cov yeeb yaj kiab tsis zoo.

Txoj kev ntawm qhov saum npoo zoo li muaj qhov cuam tshuam loj npaum li cas nws tiv thaiv cov neeg ua haujlwm huv . 316 stainless hlau qhov chaw uas du thiab txaus passivated yuav tsis tshua muaj corrode dua li cov chaw uas tsis tau kho lossis cov tshuab puas lawm. Vuam thiab dabtsi yog khoov yog ob theem nyob rau hauv cov txheej txheem fabrication uas tej zaum yuav tawm tom qab tshav kub tint los yog lwm yam kuab paug uas ua rau cov khoom uas tsis tshua muaj resistant rau corrosion yog hais tias lawv tsis ntxuav tawm. Tom qab ua cov khoom, cov tshuaj pickling thiab passivation txhim kho cov uniformity ntawm chromium oxide txheej, uas ua rau nws tsis tshua muaj kev tawm tsam hauv zos yuav tshwm sim thaum cov khoom raug cov kua qaub dua.

Thaum tu cov voj voog tshwm sim dua thiab ntau dua, sheath thickness muab rau koj ib qho kev nyab xeeb ntxiv. Txawm hais tias muaj qee qhov corrosion nyob rau sab nraud ntawm phab ntsa dhau sijhawm, txoj cai phab ntsa tuab yuav ua rau cov qauv muaj zog thiab cov hluav taws xob rwb thaiv tsev zoo. Nyob rau hauv daim ntawv thov cua sov immersion, nws yog ib qho tseem ceeb heev uas yuav tsum tau ua kom lub sheath nyob rau hauv ob qho tib si mechanical zog thiab hluav taws xob kev nyab xeeb. Yog hais tias cov hlau sheath nyias dhau lawm, nws yuav txo tau cov insulating tsis kam.

Kev tswj xyuas kev ua haujlwm yog ib qho tseem ceeb heev. Teem sijhawm soj ntsuam uas suav nrog nrhiav kev tsis muaj xim los yog pitting ntawm qhov chaw thiab kuaj cov rwb thaiv tsev tsis tu ncua tuaj yeem pab nrhiav teeb meem ntxov. Nyob rau hauv qhov chaw uas muaj kev nyab xeeb heev, hloov cov tshuaj ntxuav tu los yog txo cov kua qaub tuaj yeem ua rau lub neej ua haujlwm ntev dua. Yog tias koj yuav tsum siv cov khoom siv tu kom muaj zog heev, koj yuav xav siv cov khoom sib txawv xws li duplex stainless hlau lossis titanium. Txawm li cas los xij, cov kev hloov kho no feem ntau raug nqi ntau dua thaum xub thawj.

316 stainless hlau cua sov raj yog tus nqi - xaiv tau zoo rau cov tshuab uas yuav tsum tau ntxuav nrog kev tswj xyuas acidic cycles. Lub alloy qhia tau hais tias ntev - kev ua haujlwm ntev nrog kev tu me ntsis thaum kev tu cov txheej txheem tau zoo-tsim thiab ua raws. 316 stainless hlau tseem yog cov khoom siv nrov hauv kev lag luam uas siv cov txheej txheem cua sov thiab kev tu tshuaj tsis tu ncua vim tias nws muaj kev sib xyaw zoo ntawm corrosion kuj, txhua yam muaj zog, thiab tus nqi.

Hauv kev xaus, 316 stainless hlau cua sov cov raj uas tiv thaiv corrosion tuaj yeem ua haujlwm ntev -lub sijhawm tiv tauj rau cov tshuaj ntxuav cov kua qaub tsuav yog tias cov xwm txheej raug tswj kom txaus. Hom kua qaub, nws cov concentration, qhov kub thiab txias, qhov ntev ntawm lub sij hawm nws raug nthuav tawm, thiab kev kho deg tag nrho cuam tshuam li cas nws corrode. Cov chaw tsim khoom tuaj yeem tau txais kev ntseeg siab thiab ntev ntev - ua haujlwm cua sov, txawm tias nyob rau hauv cov tshuab uas yuav tsum tau ntxuav nrog cov tshuaj feem ntau, los ntawm kev siv cov txheej txheem ntxuav zoo tshaj plaws, ua kom lub ntsej muag zoo, thiab ua kom cov ntaub qhwv tuab txaus.