Soldering hlau solder kawg yog tsis muaj tshuaj lom
Ib tug netizen touted tias nws siv ib tug soldering hlau nyob rau hauv lub Hoobkas PCB soldering tin rau ib xyoo, puas xav tias lub cev pib tsis xis nyob, lub plab yog me ntsis o, soldering tin yog tshuaj lom? Tsis yog lead lom.
Qhov tseeb, qhov no kuj yog nyob ntawm kev ua hauj lwm nrog ib tug soldering hlau soldering lead solder hlau los yog hlau lead-dawb, thiab yuav tsum tau mus xyuas cov ntshav txhuas tsis tu ncua, tsis pub tshaj tus qauv yuav tsis muaj teeb meem nyob rau hauv tag nrho, solder yog tshuaj lom? Feem ntau hais lus, yog tias ua raws li lub teb chaws tus qauv rau kev tiv thaiv thiab kev yuav khoom ntawm raw khoom, solder tsis ua rau muaj kev puas tsuaj loj. Tam sim no pib siv cov khoom tsis muaj hlau lead.
Cov hmoov txhuas yog cov tshuaj lom neeg, tib neeg lub cev nqus tau ntau dhau yuav ua rau muaj tshuaj lom lom, kev noj tshuaj tsawg tsawg yuav muaj kev cuam tshuam rau tib neeg kev txawj ntse, lub paj hlwb thiab lub cev xeeb tub. Lub alloy ntawm tin thiab txhuas, uas feem ntau yog siv los ua solder, muaj cov khoom siv hluav taws xob zoo ntawm cov hlau thiab cov ntsiab lus melting tsawg, yog li nws tau ntev tau siv rau hauv cov txheej txheem soldering. Nws toxicity feem ntau yog los ntawm txhuas. Lead fumes los ntawm soldering tuaj yeem yooj yim ua rau muaj tshuaj lom lom.
Cov hlau lead tuaj yeem tsim cov khoom siv lead ua, tag nrho cov no tau muab cais ua cov khoom phom sij, thiab hauv tib neeg cov hlau lead cuam tshuam rau hauv nruab nrab lub paj hlwb thiab lub raum. Ib puag ncig toxicity ntawm txhuas mus rau ntau yam kab mob yog tsim tau zoo. Ntshav txhuas concentration ntawm 10ug / dl los yog ntau tshaj yuav ua rau rhiab heev biochemical teebmeem, yog hais tias ntev mus ua kom cov ntshav lead concentration ntau tshaj 60 ~ 70ug / dl yuav ua rau cov tshuaj lom tshuaj txhuas txhuas.
Cov hmoov txhuas yog cov tshuaj lom, tsis hais nws qhov loj lossis tsis yog, yog cov hlau dav dav, ntau dua yuav raug tshuaj lom, soldering, yuav muaj pa taws, uas muaj cov khoom tsis zoo rau lub cev. Thaum ua haujlwm, nws yog qhov zoo tshaj rau hnav lub npog ntsej muag, tab sis ntau dua los yog tsawg dua yuav muaj kev cuam tshuam me ntsis, yog tias koj tuaj yeem siv cov hlau lead-dawb solder hlau, yuav ntau dua txhuas, kom muaj kev nyab xeeb ntau dua.
Puas yog cov hlau lead tsis muaj tshuaj lom?
Soldering hlau soldering khoom siv solder hlau, txawm hais tias nws lub ntsiab tivthaiv yog tin, tab sis kuj muaj lwm yam hlau. Feem ntau muab faib ua cov hlau lead thiab tsis muaj txhuas (piv txwv li, ib puag ncig tus phooj ywg). Nrog rau kev qhia txog EU ROHS tus qauv, tam sim no ntau thiab ntau PCB soldering factories xaiv cov hlau lead-dawb ib puag ncig tus phooj ywg, leaded solder hlau kuj maj mam hloov, tsis yog ib puag ncig tus phooj ywg tawm ntawm lub qhov ncauj. Lead-free solder paste, lead-free solder wire, lead-free solder bars yog cov khoom tseem ceeb ntawm lub khw.
Yooj yim muab tso rau: qhov teeb meem dav dav siv los ntawm solder vim qhov qis melting point, muaj cov hlau lead 60%, muaj li 40% tin, yog li lub solder nws tus kheej yog tshuaj lom. Feem ntau ntawm cov solder nyob rau hauv lub lag luam yog hollow, ntim nrog rosin, yog li cov roj koj hais, nws yog kwv yees hais tias lub vuam ntawm rosin melting nyob rau hauv lub solder volatilized tawm. Rosin volatile gas kuj yog ib co micro-toxicity, cov pa no tsis kaj siab heev. solder nyob rau hauv lub vuam ntawm qhov tseem ceeb tshaj plaws kev phom sij yog cov pa taws, txawm tias tsis muaj cov hlau lead, uas ntau dua los yog tsawg dua muaj cov txhuas txhuas. Lead fume hauv GBZ2-2002 nyob rau hauv tus nqi txwv yog tsawg heev, lom heev, yuav tsum tau tsom rau kev tiv thaiv. Vim yog kev puas tsuaj ntawm cov txheej txheem vuam ntawm tib neeg lub cev thiab ib puag ncig, nyob rau hauv cov teb chaws Europe, kev tiv thaiv cov neeg ua haujlwm vuam thiab kev tiv thaiv ib puag ncig tau raug tswj hwm raws li txoj cai lij choj, thaum tsis muaj kev tiv thaiv cov xwm txheej ntawm vuam. tsis pub. Nyob rau hauv ISO14000 tus qauv ntawm cov txheej txheem tsim cov pa phem tsim los ntawm kev kho thiab kev tiv thaiv cov kev cai meej.
Tin muaj cov hmoov txhuas, txhuas nyob rau hauv yav dhau los solder hlau soldering cais raws li kev ua haujlwm txaus ntshai (hauv National Occupational Disease Inventory); tam sim no peb cov kev lag luam dav siv yog siv cov hlau lead-free solder, cov khoom tseem ceeb yog tin, CDC ntsuas tin dioxide; thiab tsis nyob hauv National Occupational Disease Inventory. Cov txheej txheem tsis muaj txhuas (leadfree) feem ntau hais lus, cov pa luam yeeb txhuas tsis dhau, tab sis muaj lwm yam kev phom sij ntawm cov khoom siv, xws li flux (rosin-zoo li cov khoom) muaj qee qhov kev puas tsuaj, nyob ntawm seb qhov xwm txheej tshwj xeeb pom. Cov neeg ua haujlwm feem ntau tuaj yeem saib qhov kev faib tawm ntawm cov tin yog dab tsi daim ntawv lo, uas yog nyob rau hauv qeb twg, yog li koj tuaj yeem muaj pov thawj thiab xav kom cov tuam txhab kho dua tshiab (koj tuaj yeem muab tswv yim rau lub koom haum kev lag luam sab hauv). Yog hais tias lub tin yog lead, nws yeej muaj teeb meem rau lub cev. Nyob rau tib lub sij hawm, lawv accumulates nyob rau hauv lub cev, lub paj hlwb tiv thaiv kab mob.
Lead-free solder wire yog ib puag ncig tus phooj ywg, tab sis cov hlau lead-dawb solder hlau kuj muaj teeb meem rau tib neeg lub cev. Cov ntsiab lus ntawm cov hlau lead uas tsis muaj cov hlau lead tsis muaj cov hlau lead tsis muaj cov hlau lead, thiab cov hlau lead uas tsis muaj cov hlau lead, cov hlau tsis muaj cov hlau lead tsis tshua muaj kuab paug rau ib puag ncig thiab tib neeg lub cev dua li cov hlau lead. Cov roj uas tsim tawm thaum soldering yog tshuaj lom, muaj cov roj rosin, zinc chloride thiab lwm cov pa roj carbon monoxide tsim.
