Rau kev tswj hwm ntawm hydrochloric acid ntxuav tank, qhov tseem ceeb tshaj plaws yog tswj lub sijhawm pickling thiab lub neej ntawm pickling tank, thiaj li ua kom lub siab tshaj plaws tsim tau thiab kev pab lub neej ntawm lub pickling tank.
Txhawm rau kom tau txais cov txiaj ntsig zoo tshaj plaws, cov concentration ntawm hydrochloric acid yuav tsum tau tswj ua ntej, thiab tom qab ntawd cov ntsiab lus ntawm cov hlau ions (hlau ntsev) hauv cov tshuaj pickling yuav tsum tau tswj.Vim hais tias tsis yog tsuas yog cov concentration ntawm cov kua qaub yuav cuam tshuam cov nyhuv pickling ntawm lub workpiece, tab sis kuj cov ntsiab lus ntawm cov hlau ions yuav txo qhov loj feem ntawm cov pickling tov, uas yuav cuam tshuam rau lub pickling nyhuv thiab ceev ntawm lub workpiece.Nws yog ib qho tsim nyog sau cia tias txhawm rau kom tau txais qhov zoo tshaj plaws pickling efficiency, cov tshuaj pickling yuav tsum muaj qee yam ntawm cov hlau ions.
(1)Pickling lub sijhawm
Qhov tseeb, lub sij hawm pickling yeej yog nyob ntawm qhov concentration ntawm hydrochloric acid / hlau ions (hlau ntsev) thiab qhov kub ntawm cov tshuaj pickling.
Kev sib raug zoo ntawm lub sijhawm pickling thiab zinc cov ntsiab lus:
Nws yog qhov tseeb paub zoo hauv kev ua haujlwm kub dip galvanizing uas siv kev tiv thaiv overpickling ntawm galvanized workpieces ua rau ntau zinc loading, piv txwv li "overpickling" nce zinc noj.
Feem ntau, immersion nyob rau hauv lub pickling tank rau 1 teev yog txaus kom tshem tawm cov xeb tag.Qee zaum, raws li kev ua haujlwm ntawm lub Hoobkas, cov khoom ua haujlwm plated tuaj yeem muab tso rau hauv lub tank pickling thaum hmo ntuj, uas yog, immersion rau 10-15 teev.Xws li galvanized workpieces yog plated nrog zinc ntau dua li lub sij hawm pickling.
(2)Pickling zoo tshaj plaws
Qhov zoo tshaj plaws pickling nyhuv ntawm workpiece yuav tsum yog thaum lub concentration ntawm hydrochloric acid thiab cov concentration ntawm precipitated hlau ions (hlau ntsev) ncav cuag ib tug txheeb ze sib npaug.
(3)Txoj kev kho rau cov nyhuv acid poob
Thaum cov kua txiv hmab txiv ntoo txo qis los yog poob cov nyhuv pickling vim qhov saturation ntawm hlau ions (hlau ntsev), nws tuaj yeem diluted nrog dej kom rov ua haujlwm ntawm pickling.Txawm hais tias qhov concentration ntawm hydrochloric acid txo qis, kev ua haujlwm tuaj yeem tseem tuaj yeem ua haujlwm, tab sis tus nqi qeeb dua.Yog hais tias cov kua qaub tshiab ntxiv rau cov kua txiv hmab txiv ntoo nrog cov ntsiab lus hlau saturated, qhov concentration ntawm cov tshuaj hydrochloric acid tshiab yuav poob siab tshaj qhov saturation point, thiab cov pickling ntawm lub workpiece tseem yuav ua tsis tau.
(4)Kev kho mob ntsuas tom qab cov kua qaub solubility txo
Thaum cov tshuaj pickling yog siv rau lub sijhawm, nws cov concentration txo qis thiab txawm tias ua kua qaub pov tseg.Txawm li cas los xij, cov kua qaub nyob rau lub sijhawm no tsis tuaj yeem rov qab los ntawm cov chaw tsim khoom, thiab tseem khaws qee tus nqi rau kev siv.Txhawm rau siv cov kua qaub qis nrog kev txo qis, lub sijhawm no, cov khoom ua haujlwm uas muaj cov dej ntws hauv zos plating hauv kub-dip galvanizing thiab yuav tsum tau rov dipped yog feem ntau muab tso rau hauv cov ntawm lawv, pickling thiab reprocessing kuj yog ib qho kev siv tau zoo. pov tseg acid.
Txoj kev hloov cov kua qaub qub nrog hydrochloric acid pickling kua:
Thaum cov hlau ntsev hauv cov kua qaub qub tshaj cov ntsiab lus, nws yuav tsum tau hloov nrog cov kua qaub tshiab.Cov txheej txheem yog cov kua qaub tshiab rau 50%, cov kua qaub qub ntxiv rau cov kua qaub tshiab tom qab nag lossis daus, thiab cov kua qaub qub yog ~ 50%.Hlau ntsev nrog cov ntsiab lus tsawg dua 16% tuaj yeem ua rau kom muaj kev ua haujlwm ntawm cov kua qaub, uas txawv ntawm cov kua qaub, thiab tseem txuag cov kua qaub.
Txawm li cas los xij, nyob rau hauv txoj kev no, nrog kev nce qib ntawm kub-dip galvanizing thev naus laus zis, tus nqi ntawm cov kua qaub qub ntxiv yuav tsum tau ua los ntawm kev tswj hwm cov ntsiab lus ntawm cov ntsev ntsev ntawm cov kua qaub qub, thiab cov ntsiab lus ntawm cov ntsev hlau hauv cov tshiab tshiab. npaj hydrochloric acid tov yuav tsum tau tswj nyob rau hauv lub xib teg ntawm koj txhais tes.Nyob rau hauv qhov ntau, koj yuav tsum tsis txhob blindly ua raws li tej yam tseem ceeb.
Workpiece steel khoom thiab pickling ceev
Lub pickling ceev sib txawv nrog cov muaj pes tsawg leeg ntawm pickled steel workpiece thiab lub resulting scale.
Cov ntsiab lus carbon nyob rau hauv cov hlau muaj kev cuam tshuam zoo rau kev sib cais ntawm cov hlau matrix.Qhov nce ntawm cov ntsiab lus carbon yuav ua rau kom qhov sib cais ntawm cov hlau matrix sai.
Qhov kev sib cais ntawm cov hlau workpiece matrix tom qab ua haujlwm txias thiab kub yog nce;thaum lub dissolution tus nqi ntawm steel workpiece tom qab annealing yuav txo.Nyob rau hauv cov hlau oxide nplai nyob rau saum npoo ntawm cov hlau ua haujlwm, qhov kev sib cais ntawm cov hlau monoxide loj dua li ntawm ferric oxide thiab ferric oxide.Cov nplooj ntawv hlau uas muaj cov hlau monoxide ntau dua li cov nplooj ntawv hlau annealed.Yog li ntawd, nws cov pickling ceev kuj ceev.Lub thickness ntawm cov hlau oxide daim tawv nqaij, lub sij hawm ntev pickling.Yog hais tias lub thickness ntawm cov hlau oxide nplai tsis sib xws, nws yog ib qho yooj yim los tsim cov hauv zos hauv qab-pickling los yog over-pickling defects.
Post lub sij hawm: Feb-27-2023