Pickling bụ a ot usoro n'ọrụ maka ọcha nkemetal elu.A na-emikpu ihe ndị na-arụ ọrụ n'ime mmiri mmiri nwere sulfuric acid, n'etiti ihe ndị ọzọ, iji mee ka mwepụ nke ihe nkiri oxide si n'elu igwe.Usoro a na-eje ozi dị ka ihe mmalite ma ọ bụ ntinye etiti na usoro mmepụta ihe dị ka electroplating, enameling, rolling, passivation, na ngwa ndị yiri ya.
Usoro a na-eji ewepụ oxide akpụkpọ na nchara n'elu ígwè si n'elu ígwè na ígwè, na-eji ngwọta acidic, na-egosi dị ka pickling.
Ígwè oxides dị ka oxide scale na nchara (Fe3O4, Fe2O3, FeO, wdg) na-enweta mmeghachi omume kemịkalụ na ngwọta acid, na-eme nnu nke na-agbaze na ngwọta acid wee wepụ ya.
na-enweta mmeghachi omume kemịkalụ na ngwọta acidic, na-ebute nguzobe nke nnu soluble nke a na-ewepụta ma emesịa.Acids na usoro pickling na-agụnye sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, chromic acid, hydrofluoric acid na acids mejupụtara.Nke kachasị, sulfuric acid na hydrochloric acid bụ nhọrọ kacha amasị.Usoro ịchịkọta ihe bụ isi gụnyere ịcha mmiri mmiri, ịhịa aka n'ahụ, na iwepụ nchara nchara.
N'ozuzu, a na-ejikarị pickling immersion eme ihe, a pụkwara iji usoro ịgba mmiri mee ihe n'ichepụta oke
A na-edobe ihe ndị dị nchara nchara n'ime 10% ruo 20% (site na olu) ngwọta sulfuric acid na okpomọkụ na-arụ ọrụ nke 40ºC.Ndochi nke ngwọta pickling ga-adị mkpa mgbe ọdịnaya ígwè karịrị 80g/L na ferrous sulfate karịrị 215g/L na ngwọta.
N'ime ụlọ okpomọkụ,pickling ígwèna 20% ruo 80% (olu) hydrochloric acid ngwọta adịghị adịkarị mfe na corrosion na hydrogen embrittlement.
N'ihi mkpọpụta proclivity nke acids n'ebe ọla dị, a na-ewebata ihe mgbochi corrosion.Mgbe emechachara, elu igwe ahụ na-egosipụta ọdịdị ọla ọcha na-acha ọcha, na-aga n'ihu n'otu oge iji kwalite njiri nguzogide corrosion nke igwe anaghị agba nchara.
Ịtụkwasị obi na nkọwapụta a bara uru.Ọ bụrụ na ajụjụ ọzọ bilitere, biko egbula oge ịkọrọ ya.
Oge nzipu: Nov-22-2023