1.Puas tau tso cai rau hauv cov pa kub -dip galvanized coils?
Hauv ib txwm kub-dip galvanizing, zinc ingot tsis yog 100% zinc ntshiab. Txhawm rau txhim kho qhov zoo thiab qhov dej ntawm cov txheej txheem thiab txo qhov melting point, qee qhov nyiaj ntawm aluminium, antimony, lead, thiab tin yog ntxiv rau zinc da dej.
Common Composition: Zinc da dej siv nyob rau hauv ib txwm kub -dip galvanizing (xws li, ntshiab zinc coatings, tsis suav Galfan alloys) feem ntau muaj 0.05% mus rau 0.20% txhuas.
Lub Hom Phiaj: Cov hmoov txhuas ua kom qhov loj thiab qhov pom ntawm zinc spangles thiab ua kom cov txheej txheej zoo sib xws.
Cov txheej txheem ntsig txog: Cov qauv xws li ASTM A123 (kub-dip galvanizing ntawm cov khoom siv) thiab ASTM A653 (galvanized steel sheets) muaj cov txheej txheem tshuaj lom neeg tshwj xeeb rau zinc ingots siv hauv cov tsoos galvanizing, uas tso cai rau muaj cov hmoov lead.
2.Puas yog txhuas tso cai rau hauv daim ntawv thov rhiab xws li kev sib cuag zaub mov, dej haus thiab cov khoom ua si?
Galvanized coils siv nyob rau hauv cov cheeb tsam rhiab yuav tsum ua raws li cov kev cai ib puag ncig thiab feem ntau yuav tsum tau yuav cov khoom tshwj xeeb "lead-dawb galvanized" lossis "qis- txhuas galvanized" cov khoom.
3.Dab tsi yog " txhuas-dawb galvanizing"?
Siv high-purity zinc ingots: High-purity zinc ingots nrog cov ntsiab lus tsis tshua muaj hlau lead (piv txwv li, <0.01%) yog siv thaum lub sij hawm galvanizing.
Siv cov hlau lead-dawb alloys: Lwm cov khoom siv alloying yog siv los hloov cov hlau lead, nrog bismuth yog lwm txoj hauv kev. Piv txwv li, zinc-bismuth alloys tuaj yeem ua tiav cov hlau lead-dawb txheej yam tsis muaj kev cuam tshuam rau txheej txheej.
4.Dab tsi yog cov ntsiab lus ntawm cov hlau lead uas yuav tsum tau siv rau kev lag luam / kev tsim kho?
Lead feem ntau tso cai (0.05%-0.20%), tsis muaj kev txwv yuav tsum tau ua
5.Cov lus qhia dab tsi koj muaj thaum yuav khoom?
Qhia meej txog kev npaj siv: Thaum yuav khoom galvanized coils, thawj zaug qhia qhov khoom siv kawg. Yog tias cov khoom lag luam suav nrog zaub mov, dej, menyuam yaus, lossis khoom siv hluav taws xob, ua rau muaj kev txhawj xeeb txog ib puag ncig nrog tus neeg muag khoom.
Thov daim ntawv pov thawj: Thov cov neeg muag khoom muab cov ntaub ntawv pov thawj lossis RoHS Daim Ntawv Tshaj Tawm Txog Kev Ua Raws Cai, uas yuav tsum tau qhia meej txog cov ntsiab lus ntawm cov khoom txwv xws li txhuas.
Siv cov lus tseem ceeb: Thaum nug thiab muab cov lus txiav txim, siv cov ntsiab lus xws li "lead-dawb galvanizing," "RoHS raws," thiab "ib puag ncig tus phooj ywg galvanizing" kom ntseeg tau tias koj pom cov khoom tsim nyog.