1.Dab tsi yog kev sib raug zoo ntawm hydrochloric acid concentration thiab kub?
Hydrochloric acid concentration: Feem ntau tswj ntawm 15% thiab 25% (qhov hnyav feem pua, xa mus rau qhov concentration ntawm cov kua qaub tshiab los yog ntxiv). Qhov feem ntau siv thiab ua haujlwm tau zoo yog 18% - 22%.
Acid tov kub: Feem ntau tswj ntawm 70℃thiab 95 degree.
Relationship: Within a certain range, increasing the temperature is more effective in promoting pickling speed than simply increasing the concentration. However, excessively high temperatures (e.g., >95 degree) yuav ua rau kom ceev hydrochloric acid volatilization, ua rau cov khib nyiab loj, ib puag ncig hnyav, thiab cov cuab yeej ua kom nrawm dua.
2.Dab tsi yog qhov cuam tshuam ntawm dynamic tswj tsis?
Dawb acid concentration: Qhov no yog hais txog qhov concentration ntawm HCl zoo nyob rau hauv lub pickling da dej uas tseem tsis tau noj. Qhov no yog qhov qhia ncaj qha ntawm lub peev xwm pickling thiab yuav tsum tau khaws cia ntawm ib theem (piv txwv li, 3% - 10%) kom ntseeg tau tias lub zog pickling txaus.
Fe²⁺ concentration: Qhov no yog hais txog cov ntsiab lus ntawm yaj ferrous chloride nyob rau hauv lub pickling da dej. Nws nce tsis tu ncua nrog ntau lawm.
Important impact: Lower Fe²⁺ concentration is not always better. A certain level of Fe²⁺ (e.g., 100 - 140 g/L) can increase acid density, reduce hydrochloric acid volatilization, and provide some corrosion inhibition for the substrate. However, excessively high concentrations (e.g., >180-200 g / L) yuav txo qis tus nqi pickling, yuav tsum tau tawm ntawm qee cov kua qaub pov tseg thiab ntxiv cov kua qaub tshiab.
3.Dab tsi yog lwm yam tseem ceeb uas cuam tshuam rau qhov chaw concentration?
Qib Steel thiab Kub-Rolled Chev Qhov Zoo:
Ordinary Carbon Steel (CQ): Cov txheej txheem txheem tuaj yeem siv tau.
Siab -Strength Steel los yog Si-Cov Hlau: Nws cov hlau oxide nplai (tshwj xeeb tshaj yog Fe₂SiO₄) yog qhov nyuaj dua rau yaj, muaj peev xwm xav tau cov kua qaub ntau dua thiab kub, lossis ntev dua lub sijhawm pickling.
Oxide Scale Thickness thiab Structure: Qhov sib txawv kub dov kub thiab coiling kub ua rau sib txawv oxide nplai thicknesses thiab ntom (xws li, xiav brittle oxide nplai yog nyuaj rau pickle), yuav tsum tau kho cov txheej txheem.
Kab Ntau Lawm Ceev:
Qhov ceev ceev, lub sij hawm luv luv ntawm cov sawb hauv cov kua qaub da dej, yuav tsum muaj cov kua qaub ntau dua thiab qhov kub thiab txias kom ntseeg tau tias oxide nplai tshem tawm hauv lub sijhawm.
Pickling hom:
Tsaus Tank Turbulent Pickling: Tam sim no txoj hauv kev tseem ceeb, siv cov tshuaj tua kab mob muaj zog los txhim kho kev ua tau zoo, tso cai rau qhov qis dua thiab qhov kub thiab txias.
4.Lub hom phiaj ntawm kev tswj cov concentration ntawm hydrochloric acid thaum lub sij hawm pickling yog dab tsi?
Ua kom tiav cov hlau oxide nplai thaum txo qhov kev pheej hmoo ntawm ntau tshaj -acid pickling thiab hydrogen embrittlement ntawm lub hauv paus hlau, thiab tswj cov nqi (acid noj, zog noj).
5.Dab tsi yog cov txheej txheem rau kev kho qhov concentration ntawm hydrochloric acid siv rau pickling?
Raws li cov hlau hom, kab ceev, thiab oxide nplai qhov xwm txheej, kev lag luam, kev ua haujlwm zoo, thiab qhov chaw ruaj khov ua ke yog pom nyob rau hauv qhov dav ntawm HCl concentration ntawm 15% -25% thiab kub ntawm 70-95 degree.