Daaweynta biyaha wasakhda ah ee ku jirta chromium-ka ee electroplation

Isbarbardhiga saameynta daweynta ee sulfate froring iyo sodium bisulfite

Geedi socodka wax soo saarka korantada wuxuu u baahan yahay in la dhigo, iyo habka loo nadiifiyo, asal ahaan dhirta korantada, sidaa darteed wasakhda tamarta korantada waxay soo saari doontaa tiro badan oo biyo-galeenka lagu ridayo. Chromium-ka ku jira biyaha wasakhda ah ee ku jirta koromium waxaa ku jira chromium hexavalent, oo ah sun iyo adag tahay in meesha laga saaro. Hexavalent chromium waxaa badanaa loo beddelaa chromium-ka oo laga saaray. Ka saarida chrome-kujira chrome-ka ku jira tamarta wasakhda ah, isku-darka kiimikaad iyo roobab ayaa badanaa loo isticmaalaa in lagu qaado. Caadi ahaan loo adeegsado ayaa ah qaab-dhismeedka roobka iyo lime yare habka roobka iyo soodhiyamka ee Bisium Bisulfite iyo habka loo yareeyo qaabka roobka ee Alkali.

1. Ferraus sulfate iyo lime yare

Salrous sulfate waa aashito acid oo xoog leh oo leh sicir-bararka sicir-bararka. Salrous sulfate-ka ayaa si toos ah loo dhimi karaa chromium hexavles ka dib biyo-mareenka biyaha, iyo roobabku wuxuu ka caawin karaa dareenka isku-dhafka ah ee ku saabsan rootiga 'chromium-ka', ka saarida saameynta koromium hydroxide, ka saarida chromate ayaa gaari kara ilaa 94%.

Ferraus sulfate oo lagu daray 'sulfate' oo ah dhimista roobka chromate roobka ayaa saameyn wanaagsan ku leh ka saarida chromium iyo qiimaha jaban. Marka labaad, looma baahna in la hagaajiyo qiimaha pH ka hor inta lagu daro sulfate froring sulfate, oo ay u baahan tahay oo keliya in lagu daro lime si loo hagaajiyo qiimaha pH. Si kastaba ha noqotee, sababtuna tahay qaddarka badan ee qaddarka sulfate-ka ah ee jilicsan ayaa sidoo kale sababay koror weyn oo ka dhacay dhoobada birta, kordhinta qiimaha daaweynta scuudge.

2,

Hoodium Bisulfite iyo Alyali dhimista roobka chromate, PH ee wasakhda wasakhda ah waxaa lagu hagaajiyaa ≤2.0. Markaas Sodium Bisulfite ayaa lagu daray si loo yareeyo chromium-ka si loo kala baxo, iyo biyaha qashinka lagu daro barkadda alkali, iyo qashinka biyaha lagu daro si loo saadaaliyo chromate, iyo heerka ka saarista ayaa gaari kara ilaa 95%.

Habka loo yaqaan 'sodium' ee bisulfite iyo alkali dhimis chroviate-ka ayaa u fiican ka saarida chromium-ka, oo qarashkeedu aad ayuu uga sarreeyaa sulgate frorous, iyo waqtiga falcelinta daaweyntu waa waqti dheer, oo qiimaha pH waxay u baahan tahay in lagu hagaajiyo aashitada ka hor daaweynta kahor daaweynta. Si kastaba ha noqotee, marka la barbar dhigo daaweyn jilicsan oo jilicsan, asal ahaan ma soo saarto jajaban aad u badan, oo aad u yar yareynta qiimaha daaweynta wasakhda ah, oo ah dib loo isticmaali karo.