Corroded hlau lub npe tseem hu ua etched npe tshiab.Qhov kev siv lub npog qhov ncauj, etching, kev ua tiav tom qab peb kauj ruam tsim los ntawm kev tsim cov hlau convex lo lus los yog concave hlau npe.

Cov txheej txheem kev tsim tawm ntawm cov hlau corroded:

1) Cov khoom siv:

Raws li qhov loj uas yuav tsum tau muaj los ntawm kev kos duab (teeb tsa loj), ntxiv tsis pub tsawg tshaj 5 hli ntxhib npoo ib puag ncig.Pedal txiab ntawm tus qauv 720, treadle txiab nrog tiaj thiab tsis muaj npoo ib ncig.

2) Kev kho deg ntawm cov ntawv hlau corrosion:

(1) Neeg kho tshuab polishing:

Nrog 2.2-4 kw polishing tshuab, cov ntaub plaub yog mechanically polished. Txoj phuam log siv USE lub cev muaj zog ntawm 300-350 RPM, uas feem ntau 2000-3000 RPM / min.

(2) Kev kho Alkali:

Rho lub phaj hlau nrog 10-15% sodium hydroxide nyob rau hauv qhov kev daws ntawm 65-85 ℃ rau 10-30 vib nas this, tom qab ntawd ntxuav nws nrog dej huv thiab muab nws tso rau hauv 5% aqueous tov ntawm diaminic acid.

(3) hmoov kho:

Nrog lub txhuam hniav txhuam hauv cov hmoov qub (ob npaug hmoov), txhuam cov paib kom ncaj nrog qhov chaw hla kom txog thaum cov hmoov av tshem tawm, lossis daim tawv nqaij oxygen raug tshem tawm, thiab tom qab ntawd muab khi nrog 5% potassium dichromate tov.

(4) Brushed kev ua:

Los ntawm kev siv tshuab lossis phau ntawv xaim kos duab, cov hlau saum npoo yog txhuam kom ua tiav cov nyhuv ntawm hlau rov ua dua tshiab.