Dab tsi yog qhov cuam tshuam ntawm boric acid ntawm hluav taws xob cua sov raj hauv nickel plating tov, thiab yuav ua li cas yog tias boric acid tsis txaus?

Dab tsi yog qhov cuam tshuam ntawm boric acid ntawm hluav taws xob cua sov raj hauv nickel plating tov, thiab yuav ua li cas yog tias boric acid tsis txaus?

Teb: Boric acid yog ib tug buffering tus neeg sawv cev rau nickel plating tov, uas plays lub luag hauj lwm nyob rau hauv buffering tus nqi pH ntawm cov tshuaj plating. Thaum cov concentration nce mus txog 31 grams / liter, nws muaj cov txiaj ntsig tseem ceeb, tab sis nws yuav tsum tsis txhob siab dhau, vim tias qhov solubility ntawm boric acid ntawm chav tsev kub yog li 40 grams / liter. Vim tias cov nyhuv buffering ntawm boric acid, pH tus nqi ntawm cov tshuaj cathode tsis hloov pauv, tso cai rau kev siv cov cathode ntau dua tam sim no tsis muaj nag lossis daus ntawm hydroxide ntawm cathode. Nws kuj muaj cov txiaj ntsig ntawm kev txhim kho cathodic polarization thiab txhim kho txheej txheej. Tab sis nws cov ntsiab lus ntau dhau yuav txo cov cathode tam sim no efficiency. Thaum cov nyhuv buffering tsis muaj zog qis dua 20 grams / liter, nws ua rau cov pH hloov pauv ntawm cov txheej txheem plating, cuam tshuam rau qhov zoo ntawm cov txheej txheem electroplating, thiab tseem ua rau cov txheej txheem electroplating ua tsis tau.

38. Dab tsi passivation txheej tom qab galvanizing muaj zoo corrosion kuj, dawb passivation los yog xim passivation?

Teb: Lub passivation zaj duab xis txheej tom qab galvanizing muaj zoo corrosion kuj nrog xim passivation dua nrog dawb passivation. Qhov no yog vim hais tias thaum lub sij hawm kev kho mob passivation, ib txheej ntawm cov twb tsim cov xim passivation zaj duab xis yog yaj nyob rau hauv cov tshuaj bleaching, ua rau cov xim passivation zaj duab xis tig dawb. Vim lub fact tias cov dawb passivation zaj duab xis yog thinner tshaj cov xim passivation zaj duab xis, lub corrosion kuj yog txo.

39. Yuav siv pes tsawg grams barium carbonate los kho cov sulfuric acid ntau dhau hauv chromium plating tov rau ib gram ntawm sulfuric acid?

Teb: Txhawm rau tshem tawm 1 gram ntawm sulfuric acid, kwv yees li 2 grams ntawm barium carbonate yog qhov xav tau.

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