Puas Soldering Hlau Soldering ua mob rau tib neeg?
Qhov tseeb, qhov no kuj yog nyob ntawm kev ua hauj lwm nrog ib tug soldering hlau soldering leaded solder hlau los yog tsis muaj hlau lead, thiab yuav tsum tau mus xyuas cov ntshav txhuas tsis tu ncua, tsis pub tshaj tus qauv yuav tsis muaj teeb meem ntawm tag nrho cov, solder 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 yuav tsis ua rau muaj teeb meem loj. Niaj hnub no, peb 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 cov tshuaj lom neeg txhuas, kev noj cov tshuaj tsawg tsawg yuav muaj kev cuam tshuam rau tib neeg kev txawj ntse, paj hlwb thiab kev ua me nyuam. 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.
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. Cov ntshav txhuas cov ntsiab lus ntawm 10 ug / dl lossis ntau dua ua rau muaj kev cuam tshuam biochemical rhiab heev, thiab kev raug mob ntev uas ua rau cov ntshav txhuas ntau dua 60 mus rau 70 ug / dl tuaj yeem ua rau tshuaj lom tshuaj lom neeg.
Lead yeej muaj tshuaj lom, tsis hais nws 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 lossis tsawg dua tseem yuav muaj kev cuam tshuam me ntsis, yog tias koj tuaj yeem siv cov hlau tsis muaj hlau lead, yuav muaj kev nyab xeeb ntau dua li cov hlau lead.
Puas yog cov hlau lead tsis muaj tshuaj lom?
Soldering hlau cov khoom siv solder hlau, nws yog cov khoom tseem ceeb 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. Thiab 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 volatile tawm. Rosin volatile gas kuj yog ib co tshuaj lom me ntsis, cov roj no tsis kaj siab heev. solder nyob rau hauv lub vuam ntawm lub ntsiab kev phom sij yog cov pa taws ua rau cov hlau lead, txawm tias tsis muaj cov hlau lead, uas muaj cov hlau lead ntau dua los yog tsawg dua. Lead fume nyob rau 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 phom sij ua haujlwm (hauv National Occupational Disease Catalogue); tam sim no peb feem ntau siv cov hlau tsis muaj hlau lead, cov khoom tseem ceeb yog tin, CDC ntsuas tin dioxide; thiab tsis nyob hauv National Occupational Disease Catalogue. 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 qhov cim tseg, uas yog nyob rau hauv qeb twg, kom 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 dispensed 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-free solder hlau tsis tau txhais hais tias nws tsis muaj cov hlau lead, thiab piv nrog cov hlau lead uas muaj cov hlau lead, cov hlau tsis muaj cov hlau lead tsis muaj kuab paug tsawg dua rau ib puag ncig thiab tib neeg lub cev dua li cov hlau lead. Cov roj uas tsim tawm thaum soldering yog tshuaj lom, nrog cov roj rosin, zinc chloride thiab lwm cov pa hluav taws xob tsim tawm.
