Umthengisi weSodium Dichromate eMzantsi Afrika

Yintoni iSodium Dichromate?

I-Sodium dichromate (Na₂Cr₂O₇) yityuwa ye-chromium ene-hexavalent enyibilikayo emanzini enikwa njengeekristale ezikhanyayo ezibomvu-orenji okanye njenge-dihydrate. Yenye yezona zinto zisetyenziswa kakhulu kwi-chromium kwishishini, isebenza njengesandulela se-chromic acid, i-corrosion inhibitor, kunye ne-oxidising agent enamandla. Ukunyibilika kwayo emanzini amaninzi kunye nomxholo we-Cr(VI) osebenzayo kuyenza ibe luncedo kumacandelo ahlukeneyo okuvelisa.

Ukukhusela iChromating kunye nokuGqwala

I-sodium dichromate sisithako esiphambili kwizisombululo zokuguqulwa kwe-chromate coating ezisetyenziswa kwi-zinc, aluminium, cadmium, kunye ne-magnesium substrates. Ezi layers ze-passivation zibonelela ngokumelana nokugqwala okugqwesileyo kwaye zisebenza njengomkhuthazi wokunamathela kwiinkqubo zepeyinti ezilandelayo. Kwicandelo leemoto kunye neleenqwelo-moya, iindawo eziphathwe nge-chromate zandisa ubomi benkonzo yecandelo.

Ukushiswa kwesikhumba kunye neendwangu

Ukuthambisa nge-Chrome kusetyenziswa i-sodium dichromate-derived chromium sulfate yindlela ephambili yokuthambisa nge-leather shift kwihlabathi liphela, ivelisa izikhumba ezithambileyo, ezingangeni manzi ezisetyenziswa kwizihlangu, kwiimpahla zokuhlamba, nakwiimpahla. Kwimpahla yokwaleka, i-sodium dichromate isebenza njenge-mordant, idibanisa iidayi kwiifayibha zendalo ezifana noboya. Amashishini esikhumba kunye nempahla yokwaleka eMzantsi Afrika axhomekeke kubonelelo oluqhubekayo lwetyuwa ye-chromium ukuze aqhubeke evelisa.

Ukwenziwa kweeKhemikhali kunye ne-Oxidation yeShishini

Njenge-oxidant enamandla, i-sodium dichromate isetyenziswa ekuhlanganiseni i-chromium pigments, i-chromium sulfate, kunye nezinye iikhemikhali ze-chromium. I-oxidizes iikhompawundi ze-organic kwiimpendulo ze-batch kwaye isebenza njengomnye wemveliso ye-chromium oxide green pigments. Amaxwebhu okuthobela imithetho anikezelwa kuzo zonke izibonelelo ukunceda abasebenzisi ekuhlangabezaneni nemida yokuchatshazelwa emsebenzini kunye neemfuno zolawulo lwenkunkuma.