Nrog rau txoj kev loj hlob ntawm kev tshawb fawb thiab thev naus laus zis, lub zej zog ntawm txhua yam ntawm precision machinery, bearing, hluav taws xob, cov khoom siv, cov cuab yeej, cov cuab yeej, txhais tau tias kev thauj mus los thiab cov khoom siv hauv tsev yuav tsum tau ua, kev ua haujlwm siab precision, tsis tshua muaj suab nrov, lub neej ntev kev taw qhia, stainless hlau pob yog los muab cov khoom seem.
Stainless hlau cov khoom no xav tau peb kev saib xyuas zoo, yog li txhua tus paub txog stainless hlau passivation? Qhov no yog ib qho kev siv tshuab siab heev, uas txhais tau tias ntxuav nrog cov kua qaub acid. Lub hom phiaj ntawm pickling yog tshem tawm cov oxide txheej. Kub txheej txheem stainless hlau thiab vuam kub cuam tshuam cheeb tsam yuav tsim ib txheej ntawm oxide txheej, uas yuav cuam tshuam rau corrosion kuj. Pickling feem ntau siv acid pickling thiab acid cream pickling ob txoj kev, acid pickling thiab pickling thiab txhuam ob.
Pickling solution formula (Volume fraction): 20% nitric acid (density 1.42g / C ㎡), 5% hydrofluoric acid, so dej, pickling kub ntawm chav tsev kub.
Scrub acid formula (Volume fraction): 50% hydrochloric acid, 50% dej.
Acid paste formula: hydrochloric acid (density 1.19g/c㎡) 20ml, dej 100ml, nitric acid (density 1.42g/C ㎡) 30ml, bentonite 150g.
Txoj kev leaching yog tsim rau cov khoom me me thiab cov khoom siv. Tso cov khoom siv thiab cov khoom hauv cov kua qaub ntxuav rau 25 mus rau 45 feeb, tom qab ntawd yaug nrog dej huv tom qab tshem tawm. Txhuam haum rau cov khoom siv loj, txhuam nrog txhuam kom ntxuav cov kua qaub, kom txog thaum lub teeb ci dawb, ces yaug nrog dej; Acid paste pickling kuj haum rau cov khoom siv loj. Cov txheej txheem yog siv cov kua qaub uas npaj rau lub vuam seam thiab qhov chaw ntawm lub tshav kub-cuam tshuam cheeb tsam ntawm vuam daim, thiab tso nws rau ob peb feeb ua ntej yaug nrog dej huv.
Passivation yog ua tom qab pickling. Cov tshuaj passivation yog formulated li 5ml nitric acid, 1g potassium dichromate thiab 95ml dej. Qhov kev kho mob kub yog chav sov thiab lub sijhawm kho yog 1h. Txoj kev kho mob yog los so cov tshuaj passivation ntawm qhov chaw weld, tom qab ntawd yaug nrog dej txias, ua tib zoo txhuam nrog daim ntaub, thaum kawg yaug nrog dej kub, thiab tshuab ziab.
Cov hlau xeb tom qab kev kho mob passivation, cov tsos ntawm tag nrho cov nyiaj-dawb, muaj ntau dua corrosion kuj.
