Yuav ua li cas yog vim li cas rau tsim ib co xim av zaj duab xis nyob rau hauv lub chromium plating txheej ntawm hluav taws xob cua sov raj?

Yuav ua li cas yog vim li cas rau tsim ib co xim av zaj duab xis nyob rau hauv lub chromium plating txheej ntawm hluav taws xob cua sov raj?

Teb: Ib feem ntawm cov zaj duab xis xim av nyob rau hauv chromium plating txheej yog feem ntau tshwm sim los ntawm tsis txaus sulfate ions. Tsis tas li ntawd, yog tias qhov kub ntawm cov tshuaj da dej tsawg dhau los yog cuam tshuam los ntawm impurities xws li Cl -, cov xim av xim av kuj tuaj yeem tsim nyob rau hauv chromium txheej.

21. electrolysis yog dab tsi?

Teb: Thaum tam sim no dhau los ntawm electrolyte, cov tshuaj tiv thaiv redox uas tshwm sim ntawm electrode ua rau cov electrolyte decompose nyob rau hauv qhov kev txiav txim ntawm tam sim no, uas yog hu ua electrolysis. Thaum electrified, cov cations ntawm cov electrolyte txav mus rau cathode thiab tau txais electrons ntawm cathode, uas yog txo rau cov khoom tshiab; Lub anion txav mus rau lub anode thiab poob electrons ntawm nws, ua rau oxidation rau hauv ib yam khoom tshiab. Qee zaum, oxidation ntawm cov khoom siv electrode kuj tshwm sim ntawm lub anode. Piv txwv li, electrolytic molten sodium chloride.

NaCl → Na plus Cl-

Cathode Na plus e → Na

Anode 2Cl -2e → Cl2 ↑

Kev lag luam electrolysis ua lub luag haujlwm tseem ceeb hauv kev lag luam hauv lub tebchaws, thiab ntau cov hlau tsis tshua muaj hlau yog smelted, cov khoom lag luam tshuaj tau npaj, thiab electroplating, electropolishing, anodizing, thiab lwm yam yog ua tiav los ntawm electrolysis.

22. electroplating yog dab tsi?

Teb: Cov txheej txheem ntawm kev tso ib txheej nyias ntawm lwm cov hlau rau saum npoo ntawm cov hlau los ntawm electrolysis yog hu ua electroplating. Electroplating suav nrog cov txheej txheem xws li kev kho ua ntej plating (kev tshem tawm roj, tshem tawm xeb), hlau txheej, thiab kev kho tom qab plating (passivation, tshem tawm hydrogen). Siv los tiv thaiv corrosion ntawm cov khoom hlau, kho cov khoom hnav, ua kom durability, reflectivity, conductivity, thiab zoo nkauj. Thaum electroplating, hlau qhov chaw yog siv los ua cathode, thiab cov plated hlau phaj lossis pas nrig yog siv los ua cov anode. Lawv raug dai rau ntawm tus pas nrig electrode thiab muab tso rau hauv ib qho electrolyte uas muaj cov txheej txheem, thiab tom qab ntawd raug rau tam sim no.

Qee zaum, insoluble anodes kuj tseem muaj txiaj ntsig, xws li siv cov hmoov txhuas lossis cov hlau lead antimony alloy anodes rau chromium plating.

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