Alkaline corrosives xws li ammonia thiab potassium sulfide yog qee zaum siv hauv electroplating tsim hluav taws xob cua sov raj.

Alkaline corrosives xws li ammonia thiab potassium sulfide yog qee zaum siv hauv electroplating tsim hluav taws xob cua sov raj.

Hlau blueing, alkaline galvanizing, alkaline degreasing, aluminium alloy galvanizing kev kho mob, thiab alkaline electropolishing tag nrho yuav tsum tau siv cov caustic soda. Caustic soda muaj zog adhesion thiab corrosiveness rau tib neeg cov tawv nqaij thiab khaub ncaws, thiab tuaj yeem hlawv tib neeg lub cev. Thaum ib tus neeg ua haujlwm tab tom npaj cov tshuaj blueing, lawv ntxiv dej rau hauv lub tank thiab teeb lub qhov cub tam sim ntawd. Thaum lawv tau txais cov khoom alkali, cov dej tau boiled, thiab cov khoom loj, tsis muaj alkali tau tam sim ntawd pov rau hauv dej npau npau. Vim tias cov khoom alkali dissolution yog exothermic cov tshuaj tiv thaiv, cov khoom alkali loj yog raus hauv dej kub npau npau, thiab cov thee tau kub hnyiab hauv qab ntawm lub tank, uas ua rau tawg vim qhov kub thiab txias nyob ib ncig ntawm alkali. Cov tshuaj alkali kub tau maj tawm ntawm lub tank saum npoo ntawm qhov siab tshaj 5, txau tag nrho lub tank thiab nws ib puag ncig mus rau hauv lub ntiaj teb dawb. Hmoov zoo, tus neeg teb xov tooj zam nws raws sijhawm thiab tsis raug mob ntau. Qhov no yog ib qho piv txwv ntawm kev raug mob loj ntawm tus kheej uas yuav luag tshwm sim vim ua txhaum txoj kev npaj ntawm cov tshuaj xiav xiav.

Qee lub sij hawm alkaline corrosive khoom xws li ammonia thiab potassium sulfide kuj tau siv hauv electroplating ntau lawm.

Ammonia dej muaj cov ntxhiab tsw ntxhiab, uas yuav ua rau cov pa luam yeeb thiab cov pa taws kub kub. Ammonia muaj qhov ua xua thiab xeb cuam tshuam rau cov kab mob ua pa sab saud, thiab tuaj yeem ua rau cov tshuaj alkaline kub hnyiab ntawm qhov chaw sib cuag ntawm qhov siab; Thaum cov poov tshuaj sulfide ntsib cov tshuaj acidic, nws yuav tso tawm cov pa roj hydrogen sulfide thiab cov pa phem heev. Feem ntau siv cov acids muaj zog hauv electroplating ntau lawm suav nrog sulfuric acid, nitric acid, hydrochloric acid, hydrofluoric acid, chromic acid, thiab lwm yam. Cov kua qaub no muaj zog corrosiveness, yooj yim rau hlawv tib neeg lub cev, thiab kho tau yooj yim.

Tsis tas li ntawd, nws ua rau muaj kuab paug ib puag ncig, xws li concentrated hydrochloric acid uas ua rau muaj ntau yam corrosive acid pos huab; Concentrated nitric acid yuav decompose nyob rau hauv cov huab cua thiab tso tawm heev lom nitrogen oxides! Hydrofluoric acid tso pa tawm hauv huab cua, thiab nws cov vapor muaj zog corrosiveness thiab toxicity. Thaum electroplating chromium, nws emits ib tug loj npaum li cas ntawm chromium pos huab. Chromium (!) compounds tuaj yeem ua rau ntau yam kab mob xws li daim tawv nqaij ulcers, anemia, nephritis, thiab neuritis, thiab tuaj yeem ua rau mob qog noj ntshav thiab ua rau cov noob hloov pauv.

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