Gutunganya amazi yanduye arimo chromium mu gushushanya hakoreshejwe electroplating

Kugereranya ingaruka zo kuvura ferrous sulfate na sodium bisulfite

Uburyo bwo gukora electroplating bugomba kuba bukozwe mu buryo bwa galvanized, kandi mu gihe cyo gutunganya galvanized, uruganda rukora electroplating ruzakoresha chromate, bityo amazi mabi akoreshwa mu buryo bwa electroplating azatanga amazi menshi ya chromium bitewe no gukoresha chromium. Chromium iri mu mazi mabi irimo chromium irimo chromium ifite hexavalent, ikaba ari uburozi kandi bigoye kuyikuraho. Chromium ifite hexavalent ikunze guhindurwa chromium ya trivalent hanyuma ikakurwaho. Mu gukuraho amazi mabi arimo chrome, akenshi hakoreshwa imiti igabanya ubukana n'imvura kugira ngo ikureho. Ikoreshwa cyane ni ferrous sulfate na lime reduction precipitation method na sodium bisulfite na alkali reduction precipitation method.

1. Uburyo bwo kugabanya imvura ya ferrous sulfate na lime

Sulfate y'ifu ni umuti ukomeye wo gufunga aside ufite ubushobozi bukomeye bwo kugabanya ogisijeni. Sulfate y'ifu ishobora kugabanuka mu buryo butaziguye hakoreshejwe chromium hexavalent nyuma yo kuyikoresha mu mazi yanduye, ikayihindura igice cya chromium trivalent coagulation n'imvura, hanyuma ikongeramo lime kugira ngo ihindure pH igere kuri 8 ~ 9, kugira ngo ifashe uburyo bwo gufunga kugira ngo itange chromium hydroxide precipitation, ingaruka zo gukuraho chromate zishobora kugera kuri 94%.

Ifu ya ferrous sulfate hamwe na lime coagulant igabanya imvura ya chromate igira ingaruka nziza ku gukuraho chromium no ku giciro gito. Icya kabiri, nta mpamvu yo guhindura agaciro ka pH mbere yo kongeramo ferrous sulfate, ahubwo hakenewe kongeramo lime kugira ngo hakorwe agaciro ka pH. Ariko, bitewe n'ubwinshi bw'ingano ya ferrous sulfate nabyo byateje ubwiyongere bunini bw'icyuma, bikongera ikiguzi cyo gutunganya imyanda.

2,.uburyo bwo kugabanya imvura hakoreshejwe sodium bisulfite n'amazi asanzwe

Sodium bisulfite na chromate yo kugabanya imvura ya alkali, pH y'amazi yanduye ihinduka ≤2.0. Hanyuma sodium bisulfite yongerwamo kugira ngo chromate igahinduka chromium ya trivalent, maze amazi yanduye yinjira mu kidendezi cyuzuye nyuma yo kugabanuka kurangiye, amazi yanduye ajyanwa mu kidendezi gipima kugira ngo ahindurwe, kandi agaciro ka pH gahindurwa kugeza kuri 10 hongewemo utudomo twa alkali, hanyuma amazi yanduye agashyirwa mu kigega cy'amazi kugira ngo chromate ihinduke, kandi igipimo cyo kuyakuramo gishobora kugera kuri 95%.

Uburyo bwo gukoresha sodium bisulfite na alkali reduction precipitation chromate ni bwiza mu gukuraho chromium, kandi igiciro cyabwo kiri hejuru ugereranyije na ferrous sulfate, kandi igihe cyo kuvura ni kirekire, kandi agaciro ka pH gakwiye guhindurwa na aside mbere yo kuvurwa. Ariko, ugereranije no kuvurwa na ferrous sulfate, muri rusange ntabwo ikora cyane, bigabanya cyane ikiguzi cyo kuvurwa, kandi ubusanzwe ivurwa ishobora kongera gukoreshwa.