Minggu, 22 Oktober 2017

Chromium Plating Bath

NOTE: The chemical formulations given in this article are in avoirdupois ounces per gallon of solution (avoir. oz./gal). To convert these to metric measure, simply multiply the oz/gal number by the conversion factor of 7.5 to obtain grams per litre

BRIGHT CHROME PLATING

The formula for Bright Chrome Plating use the basic formulation of 100:1 chromic acid/sulphuric acid proportions:

Chromic acid crystals = 33 oz. (936 grams)
Sulphuric acid fluid = .33 oz. (9.36 millilitre)
Distilled (or demineralized) water to make 1 gallon (3.79 litre).

Of course, you can vary these proportions in accordance with the quantity you wish to make up. So, to make up one pint for small work, simply divide everything by eight The dilution ratio of the sulphuric acid as purchased has to be taken into account and the amount used in the bath must be one of pure H2SO4 to 100 Cr03.

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