Ukwelashwa kwamanzi angcolile aqukethe i-chromium ku-electroplating

Ukuqhathaniswa kwemiphumela yokwelapha ye-ferrous sulfate ne-sodium bisulfite

Inqubo yokukhiqiza i-electroplating idinga ukufakwa uthayela, futhi kunqubo yokuhlanzwa kwamagalani, ngokuyisisekelo isitshalo se-electroplating sizosebenzisa i-chromate, ngakho-ke amanzi angcolile e-electroplating azokhiqiza inani elikhulu lamanzi angcolile aqukethe i-chromium ngenxa yocwecwe lwe-chromium.I-chromium emanzini angcolile aqukethe i-chromium iqukethe i-chromium ene-hexavalent, enobuthi futhi okunzima ukuyisusa.I-chromium ene-hexavalent ivamise ukuguqulelwa ku-chromium e-trivalent futhi isuswe.Ukuze kukhishwe amanzi angcolile aqukethe i-electroplating ane-chrome, i-chemical coagulation kanye nemvula kuvame ukusetshenziswa ukuwakhipha.Okuvame ukusetshenziswa i-ferrous sulfate kanye nendlela yokunciphisa imvula ye-lime kanye ne-sodium bisulfite kanye nendlela yokunciphisa i-alkali.

1. I-ferrous sulfate kanye nendlela yokunciphisa imvula ye-lime

I-Ferrous sulfate iyi-acid coagulant enamandla enezakhiwo eziqinile zokunciphisa i-oxidation.I-Ferrous sulfate ingancishiswa ngokuqondile nge-chromium eyi-hexavalent ngemva kwe-hydrolysis emanzini angcolile, iguqule ibe yingxenye ye-trivalent chromium coagulation kanye nemvula, bese yengeza umcako ukulungisa inani le-pH libe cishe ku-8~9, ukuze lisize ukusabela kokuhlangana ukukhiqiza imvula ye-chromium hydroxide, umphumela wokususa we-chromate ungafinyelela cishe ku-94%.

I-Ferrous sulfate kanye ne-lime coagulant yokunciphisa imvula ye-chromate inomphumela omuhle ekukhishweni kwe-chromium nezindleko eziphansi.Okwesibili, asikho isidingo sokulungisa inani le-pH ngaphambi kokwengezwa kwe-ferrous sulfate, futhi kudingeka kuphela ukwengeza umcako ukulungisa inani le-pH.Kodwa-ke, ngenxa yenani elikhulu le-ferrous sulfate dosing futhi kubangele ukwanda okukhulu kodaka lwensimbi, okwandisa izindleko zokwelashwa kodaka.

2,.i-sodium bisulfite kanye nendlela yemvula yokunciphisa i-alkali

I-sodium bisulfite ne-alkali reduction precipitation chromate, i-pH yamanzi angcolile ilungiselelwa ku-≤2.0.Bese kwengezwa i-sodium bisulfite ukuze kuncishiswe i-chromate ibe yi-chromium eyi-trivalent, futhi amanzi angcolile angena echibini eliphelele ngemva kokuqedwa kokunciphisa, amanzi angcolile ampontshelwa echibini elilawulayo ukuze alungiswe, futhi inani le-pH lilungiswa libe cishe ku-10 ngokungeza i-alkali. ama-node, bese amanzi angcolile ekhishelwa ethangini le-sedimentation ukuze kuncishiswe i-chromate, futhi izinga lokususa lingafinyelela cishe ku-95%.

Indlela ye-sodium bisulfite kanye ne-alkali yokunciphisa imvula ye-chromate ilungele ukususwa kwe-chromium, futhi izindleko zayo ziphakeme kakhulu kune-ferrous sulfate, futhi isikhathi sokusabela kokwelashwa side kakhulu, futhi inani le-pH lidinga ukulungiswa nge-asidi ngaphambi kokwelashwa.Nokho, uma kuqhathaniswa nokwelashwa kwe-ferrous sulfate, ngokuyisisekelo ayikhiqizi udaka oluningi, inciphisa kakhulu izindleko zokwelashwa kodaka, futhi udaka olulashiwe ngokuvamile lungasetshenziswa kabusha.