Ua ntej txheej txheem pickling, nws raug nquahu kom preheat cov kav hlau hauv dej kub ntawm qhov kub ntawm 25-50 degree rau 1-3 feeb ua ntej pib nrog pickling. Qhov no ua haujlwm rau ntau lub hom phiaj:
(1) Nws tuaj yeem tshem tawm cov ntaub ntawv hlau, ntau yam av, thiab cov roj me me txuas nrog rau cov yeeb nkab steel uas tsis tau ua kom alkaline tu, thiab nws tuaj yeem ua kom zoo dua qub rau cov yeeb nkab steel hlau uas tau ua tiav alkaline tu.
(2) Preheating steel yeeb nkab billet accelerates tus txheej txheem pickling.
(3) Nws txo qhov kev noj ntawm cov cua sov ncaj qha rau cov tshuaj pickling, yog li txuas ntxiv cov nyhuv dilution ntawm cov kua qaub.
(4) Cov kua qaub yog huv si, ua rau kom zoo dua pickling.
(5) Nws txuag tau li ntawm 2-3% ntawm cov kua qaub noj.
