1.Lub hauv paus ntsiab lus ntawm dej -raws li alkaline degreasing agents yog dab tsi?
Cov roj stains raug tshem tawm los ntawm ob txheej txheem ntawm saponification (cov tshuaj tiv thaiv nrog tsiaj thiab zaub roj) thiab emulsification (stripping mineral oils nrog kev pab los ntawm surfactants).
2.Dab tsi yog qhov dual degreasing mechanism ntawm cov txheej txheem alkaline degreasing?
Saponification: Rau tsiaj thiab zaub roj (xws li xibtes roj) uas yuav nyob twj ywm tom qab txias dov, alkali cov neeg sawv cev (xws li NaOH) reacts chemically nrog lawv los tsim dej - soluble xab npum thiab glycerin, yog li tag nrho converting thiab tshem tawm cov roj stains.
Emulsification: Rau cov roj ntxhia uas tsis hnov mob nrog alkalis (xws li cov roj hauv paus ntawm cov roj dov), surfactants hauv degreasers ua lub luag haujlwm. Lawv txo qhov kev sib tshuam ntawm cov roj thiab dej, "txiav" cov roj yeeb yaj kiab loj rau hauv cov roj me me uas suav tsis txheeb thiab sib cais (emulsifying) lawv hauv dej, tiv thaiv lawv los ntawm kev rov ua dua -adhering rau steel phaj nto.
3.Dab tsi yog qhov kev ua haujlwm tseem ceeb?
Concentration: Ib qho concentration ntawm 2% mus rau 5% feem ntau pom zoo. Kev hloov kho tej zaum yuav xav tau raws li qhov tseeb ntawm cov roj paug.
Kub: Feem ntau ntawm 50℃thiab 90 degree. Cov cua sov tsim nyog tuaj yeem txhim kho degreasing efficiency thiab ceev. Qee qhov kev tshawb fawb tau tshwj xeeb tsim cov tshuaj degreasing uas tseem tuaj yeem ua haujlwm tau zoo ntawm qhov kub qis ntawm 3 degree.
Lub Sijhawm: Nyob ntawm tus txheej txheem, nws txawv ntawm 2-25 vib nas this (kev kub ceev nruam annealing kab) mus rau 2-15 feeb (hom immersion).
Txoj kev: tuaj yeem txau, immersion, lossis ua ke ntawm kev txau thiab electrolysis. Electrolytic degreasing siv ntau cov npuas tsim los ntawm dej electrolysis los tsim kom muaj zog tearing nyhuv ntawm cov roj zaj duab xis, ua rau kom sai thiab meej degreasing.
4.Puas acidic kuab tshuaj siv tau?
"Scale removers" muaj hydrochloric acid, oxalic acid, thiab citric acid. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias tshwj tsis yog tias koj lub hom phiaj tshwj xeeb yog tshem tawm cov nplai hnyav (xeb), cov kua qaub acidic yuav tsum raug zam hauv kev niaj hnub degreasing.
5.Yuav ua li cas degreasing rau txias -rolled coils?
Rau loj -kev ua lag luam loj, xaiv cov dej-raws li alkaline degreaser ua haujlwm hauv cov cua sov; qhov no yog qhov kev daws teeb meem zoo tshaj plaws ntawm kev ua tau zoo, tus nqi, thiab ib puag ncig tus phooj ywg.
Rau cov khoom me me, kev ua haujlwm hauv chav kuaj, lossis cov khoom kho tshwj xeeb, xav txog kev siv ceev ceev - ziab cov tshuaj hydrocarbon los yog lwm cov kuab tshuaj organic raws li kev xaiv ntxiv.