Cov txheej txheem ua haujlwm los tshem tawm cov tawv nqaij oxide thiab xeb ntawm cov hlau los ntawm cov hlau thiab hlau, siv cov tshuaj acidic, yog suav tias yog pickling.
Cov hlau oxides xws li oxide nplai thiab xeb (Fe3O4, Fe2O3, FeO, thiab lwm yam) raug tshuaj lom neeg nrog cov kua qaub, tsim cov ntsev uas yaj hauv cov kua qaub thiab tshem tawm.
undergo cov tshuaj tiv thaiv nrog acidic daws, uas ua rau tsim cov soluble ntsev uas tom qab muab rho tawm.Cov kua qaub rau cov txheej txheem pickling suav nrog sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, chromic acid, hydrofluoric acid, thiab composite acids.Feem ntau, sulfuric acid thiab hydrochloric acid yog nyiam xaiv.Pickling methodologies feem ntau muaj xws li immersion pickling, spray pickling, thiab acid paste xeb tshem tawm.

Feem ntau, immersion pickling feem ntau yog siv, thiab cov tshuaj tsuag tuaj yeem siv rau hauv ntau lawm

Hlau Cheebtsam yog conventionally raug rau pickling nyob rau hauv ib tug 10% mus rau 20% (los ntawm ntim) sulfuric acid tov nyob rau hauv ib tug ua hauj lwm kub ntawm 40 ° C.Kev hloov cov tshuaj pickling yuav tsum yog qhov tseem ceeb thaum cov ntsiab lus hlau tshaj 80g / L thiab ferrous sulfate tshaj 215g / L hauv cov tshuaj.

Nyob rau hauv chav tsev kub,pickling hlaunrog 20% ​​mus rau 80% (ntim) hydrochloric acid tov yog tsis tshua muaj corrosion thiab hydrogen embrittlement.
Raws li cov lus tshaj tawm corrosive proclivity ntawm cov kua qaub rau cov hlau, corrosion inhibitors tau qhia.Tom qab ntxuav, cov hlau saum npoo nthuav tawm cov xim dawb-dawb, ib txhij ua passivation rau augment lub corrosion kuj yam ntxwv ntawm stainless hlau.

Cia siab tias qhov elucidation no ua pov thawj muaj txiaj ntsig.Yog tias muaj lus nug ntxiv, thov tsis txhob yig tiv tauj.