1. Degreasing: Tshem cov roj thiab roj
Kev txawj nqus ntxuav: Siv cov kuab tshuaj xob khov (piv txwv li, acetone, Isopropyl cawv) lossis kev muaj cov khoom muaj nqis los so lossis tshuaj tsuag qhov chaw. Siv tau rau lub teeb roj tsis huv tab sis yuav tsum muaj qhov cua.
Kev tu ib qho alkaline: Rabass lossis tsuag nrog cov tshuaj alkaline me me (piv txwv li, 5-10% sodium carbonate) ntawm 40-60℃rau 15-30 feeb. Nws emulsifies roj thiab yog qhov zoo tagnrho rau cov roj hnyav, ua raws los ntawm ib qho dej ua haujlwm kom tshem tawm cov seem.
Kev Tu Tshuab Ultrasonic: Haum rau qhov chaw me; Ultrasonic tsis nyob rau hauv ib degrgeit dej disoldspge embedded roj, kom huv si tu.
2. Descaling: Tshem tawm zeb nplai thiab xeb
Sandblasting: Siv abrasive xov xwm (piv txwv li, 80 {{}} 120 mesh dawb corundum, garnet) ntawm 0.5-0.8 mpa kom siab. Tsim cov ntxhib, uniform nto (ra 3.2-6.3 μm) zoo tagnrho rau patina tsim lossis pleev xim. Zam kev dhau los tiv thaiv kom tiv thaiv cov khoom poob.
Kev txhuam hniav hlau: Phau ntawv ceev lossis fais fab - Cov hlau tshem tawm (cov teeb hluav taws xob tshem tawm, haum rau cov qauv loj uas muaj kev cuam tshuam.
Kev sib tsoo: Siv cov abrasive los yog siv tawv rau hauv ib cheeb tsam tshem tawm, txawm hais tias nws yuav tawm ntawm thaj chaw tsis ncaj yog tias tsis tswj tau.
Pickling: Rawv hauv dilute acids (5-10% phosphoric acid los yog 10-15% sulfuric acid) ntawm 20-40℃rau 20-60 feeb. Dissolves zeb nplai thiab oxides, tawm ntawm qhov chaw huv, me ntsis etched nto. Neutralize nrog lub zog alkaline tov (piv txwv li, ci dej qab zib) tom qab kom nres cov kua qaub.
Chelating tus neeg sawv cev: Cov kev xaiv zoo ib puag ncig rau cov kua qaub; Chelators (piv txwv li, citric acid derivatives) khi hlau ions hauv nplai, xoob nws yam tsis muaj kab tsuag ething.
3. Yaug thiab ziab
Cua Kom Qhuav: Cia kom qhuav hauv zoo - pa taws chaw (2-4 teev) rau qhov me me.
Yuam Kev Cua / Tshav Kub Kom Qhuav: Siv kiv cua lossis qis {- kub ncu (<60°C) for large components to prevent water spots or flash rust.
4. Passivation (xaiv tau, rau corrosion tsis kam ua ntej siv)
Chromate Conversion Txheej: Thov cov kua roj chomate los tsim cov yees duab, inert zaj duab xis uas txwv tsis pub oxidation. Haum rau sab hauv tsev cia tab sis tsis zoo tagnrho rau kev siv sab nraum zoov raws li nws yuav cuam tshuam nrog PATINE tsim.
Phosphating: Kho nrog phospphate daws teeb meem los tsim cov txheej duab ntsev, txhim kho cov xim pleev xim yog tias cov hlau yuav muab coated tom qab.
