Dab tsi yog cov kev pabcuam lub neej ntawm Galvanized steel los xij? Dab tsi tshwm sim cuam tshuam no?
Nyob rau hauv ib txwm siv, cov kev pabcuam lub neej ntawm galvanized steel ntawv yog feem ntau 10-30 xyoos. Yuam kev cuam tshuam qhov no yog:
Zinc Txheej Thickness: cov tuab tuab cov txheej zinc, qhov ntev dua cov kev pabcuam lub neej (piv txwv li ntawm 125g / m n
Kev Siv Ib puag ncig: Lub neej pabcuam ntev hauv cov chaw hauv dej qhuav (ntau dua 30 xyoo), thiab txawm tias muaj kev pab cuam ntsev rau hauv cov chaw muaj kev lag luam (muaj cov sulfur dioxide).
Kev Txij Nkawm: Kev tu tu ib txwm thiab zam kev khawb tuaj yeem txuas lub neej pabcuam ntxiv. Yog tsis txhob cem cov khawb ntoo yuav ua kom xeb kom ceev.
Kuv tuaj yeem tshawb xyuas zinc txheej tuab ntawm cov nplooj ntawv galvanized?
Ob qho sib xws tsis - Kev sim tshuaj ntsuam xyuas yog siv:
Kev sib nqus thickness koob: ntsuas cov zinc tuab siv qhov sib txawv permeability ntawm zinc txheej ntawm zinc txheej ntawm zinc txheej ntawm zinc txheej ntawm zinc Txheej (tsis yog}} sib nqus) thiab cov sib nqus). Haum rau GI thiab piv txwv (tsis -} alloyed zinc txheej), nrog qhov tseeb ntawm ± 2μm.
Eddy tam sim no tuab cov ntsuas cua daj cua dub: Ntsuas cov tuab ntawm cov kab zinc uas siv lub hauv paus ntsiab lus ntawm kev indectromagnetic induction. Haum rau GA (txuam zinc txheej), nrog qhov tseeb ntawm ± 3μm.
Kev sim ua kev puas tsuaj: Txiav ib qho qauv, saib tus ntoo khaub lig-} ntsuas seem ntawm zinc thickness (feem ntau siv nyob rau hauv lub chaw soj ntsuam thiab muaj qhov tseeb tshaj plaws).
Dab tsi yog qhov yuav tsum tau ua rau "cov tiaj tiaj" ntawm galvanized ntawv hlau? Nws tau sim li cas?
Flenness yog hais txog qib ntawm qhov chaw nyob ntawm daim ntawv hlau, thiab ib txwm ntsuas los ntawm "WAVENT" (Chav: M):
Cov hlau architectural sheet hlau: Waviness ≤ 5 hli / m;
Cov khoom siv hauv tsev / Automotive daim ntawv hlau: Waviness ≤ 2 hli / m (yuav tsum tau siab {1} pre} precision stamping).
Kev sim cov qauv: Tso lub galvanized ntawv hlau ntawm tus qauv platform thiab siv lub koob txheej txheem sib luag los ntsuas qhov sib txawv siab tshaj plaws ntawm daim ntawv hlau thiab lub platform. Hloov pauv, siv laser tiaj metness kom tsis tu ncua scan saum npoo kom tau laij cov waviness.
Cov txheej txheem ua tiav ntau lawm rau kub - dip galvanized steel (GI)?
Cov txheej txheem tseem ceeb muaj rau theem, feem ntau yog hu ua "ib qho ntxuav, ob ntxuav, peb lub galvanizing, thiab plaub qhov txias txias":
Substrate Preparation: Cold-rolled or hot-rolled steel sheets (depending on the intended application) are cut to the specified width;
Pretreatment:
Degreasing: degrease lub substrate nto nrog kev daws teeb meem alkaline;
Pickling: tshem tawm cov nplai oxide los ntawm cov ntu qaum nrog hydrochloric acid lossis sulfuric acid;
Kev tu thiab qhuav: yaug residual acid nrog dej huv thiab qhuav lub substrate;
Annealing: Tso lub substrate nyob rau hauv ib qho kev siv hluav taws xob (800-900 ° C) kom tshem tawm cov kev ntxhov siab sab hauv thiab txhim kho cov xim huv;
Kub - dip galvanizing: rawv annealed substrate hauv Molten Zinc (99.5% Purity) ntawm 450 ° C. (saum toj no, muaj ib qho me me ntawm txhuas) los ua cov txheej zinc;
Tshaj tawm - kev:
Cua txias: Cua txias nrog huab cua lossis dej mist mist kom tswj tau qhov loj ntawm cov zinc caj ces;
Passivation: Thov cov chromate lossis chromium - free passivation daws (txhawm rau txhim kho corrosion tsis kam thiab tiv thaiv dawb xeb ua hauj lwm);
Cov roj txheej: Txau ib txheej nyias ntawm cov roj uas siab heev - Yaj yuag roj roj (kom yooj yim ua tiav thiab tiv thaiv kom txhob muaj xeb);
Xov: Leveling (txhawm rau txhim kho kev ncaj ncees), txiav, thiab coiling los ua tiav cov coils lossis daim ntawv tiaj tus.
Dab tsi yog qhov sib txawv ntawm cov txheej txheem ntau lawm ntawm electrogalvanized ntawv (piv txwv) thiab GI? Cov tub ntxhais ntawm piv txwv yog "elecolytic deposition," nrog lub ntsiab sib txawv hauv cov txheej txheem galvanizing. Tshwj xeeb:
Pre6 -}}}}} Kev kho yog zoo ib yam li GI (deteasing, thiab tu), tab sis siab {1} Kev kho kub yog siv).
Electrogalvanizing: lub substrate yog muab tso rau hauv elecherolyte muaj zinc chloride daws), nrog rau substrate txuas nrog cathode thiab zinc phaj txuas nrog anode. Thaum tau thov, zinc ions yog tso rau ntawm substrate nto los ua ib txheej zinc txheej.
Tshaj tawm -}}}}}}}}}}}}}} awv; eG zinc txheej), roj, thiab tsis muaj kev tswj tus kheej (piv txwv li yog spangle- free).
Nta: Cov Txheej Ncaws Zinc Thickness yog tau yooj yim tswj (10-50G / m²) thiab cov nplaim yog du, tab sis ntau lawm thiab cov nqi siab.