Gutunganya amazi mabi arimo chromium muri electroplating

Kugereranya ingaruka zo kuvura ferrous sulfate na sodium bisulfite

Igikorwa cyo gutanga amashanyarazi kigomba gushyigikirwa, kandi mugihe cyo kwezwa kwa galvanis, ahanini uruganda rukora amashanyarazi ruzakoresha chromate, bityo amazi y’amashanyarazi azabyara umubare munini w’amazi y’amazi arimo chromium bitewe no gufata chromium.Chromium mumazi yanduye arimo chromium irimo chromium ya hexavalent, ifite uburozi kandi bigoye kuyikuramo.Chromium ya Hexavalent isanzwe ihindurwamo chromium trivalent hanyuma ikurwaho.Mugukuraho amazi ya chrome arimo electroplating water water, coagulation chimulation hamwe nimvura ikoreshwa mugukuraho.Bikunze gukoreshwa ni ferrous sulfate nuburyo bwo kugabanya imvura igwa hamwe na sodium bisulfite hamwe nuburyo bwo kugabanya imvura ya alkali.

1. sulfate ferrous nuburyo bwo kugabanya imvura

Sulfate ya ferrous ni coagulant ikomeye ifite imbaraga zo kugabanya okiside.Sulfate ya ferrous irashobora kugabanuka muburyo butaziguye hamwe na chromium ya hexavalent nyuma ya hydrolysis mumazi yanduye, ikayihindura mubice bya chromium triagent coagulation hamwe nimvura, hanyuma ukongeramo lime kugirango uhindure agaciro ka pH hafi 8 ~ 9, kugirango ifashe reaction ya coagulation reaction kubyara chromium hydroxide imvura, ingaruka zo gukuraho chromate zishobora kugera kuri 94%.

Ferrous sulfate wongeyeho lime coagulant kugabanya imvura ya chromate igira ingaruka nziza mukuvana chromium nigiciro gito.Icyakabiri, nta mpamvu yo guhindura agaciro ka pH mbere yo kongeramo sulfate ferrous, kandi dukeneye kongeramo lime kugirango uhindure agaciro ka pH.Nyamara, kubera ubwinshi bwa feri ya sulfate ferrous nayo yatumye ubwiyongere bukabije bwibyondo byicyuma, byongera ikiguzi cyo kuvura imyanda.

2, .sodium bisulfite nuburyo bwo kugabanya imvura ya alkali

Sodium bisulfite na alkali igabanya imvura ya chromate, pH yamazi yanduye yahinduwe ≤2.0.Noneho sodium bisulfite yongeweho kugirango igabanye chromate kuri chromium trivalent, hanyuma amazi yimyanda yinjira muri pisine yuzuye nyuma yo kugabanuka kurangiye, amazi yimyanda ashyirwa muri pisine igenzura kugirango ahindurwe, kandi agaciro ka pH kahinduwe nka 10 wongeyeho alkali. node, hanyuma amazi yimyanda asohorwa mukigega cyimyanda kugirango agabanye chromate, kandi igipimo cyo kuyikuramo gishobora kugera kuri 95%.

Uburyo bwa sodium bisulfite na alkali yo kugabanya imvura ya chromate nibyiza mugukuraho chromium, kandi igiciro cyayo kiri hejuru ya sulfate ferrous, kandi igihe cyo kuvura ni kirekire, kandi agaciro ka pH kagomba guhinduka hamwe na aside mbere yo kuvurwa.Nyamara, ugereranije no kuvura ferrous sulfate, mubusanzwe ntabwo itanga umwanda mwinshi, bigabanya cyane ikiguzi cyo kuvura imyanda, kandi isuku ivurwa irashobora kongera gukoreshwa.