Metallurgical Calculations: Introduction Chemical & Thermal Principles ... Pt. 3
Metallurgical Calculations: Introduction Chemical & Thermal Principles ... Pt. 3
Joseph William Richards
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The total anode surface is, assuming them entirely immersed, 80.0X80.0X2X20 = 256,000 sq. cm. and of the cathodes. 70.0X70.0X2X20 = 196,000 sq. cm. giving current passing through a tank 19.6X30 = 588 amperes. Since the tank is wider and deeper than the plates, the ef- fective cross-sectional area of electrolyte is 26.6 sq. m. at the anode surface, 19.6 sq. m. at the cathode surface, and greater than either (by spreading of current lines) in between. It will not be far wrong, tmder these conditi...ons, to take the ef- fective area of the electrolyte as about that of the larger elec- trode, viz., at 25.6 sq. m. The resistance of the tank thus becomes and the voltage absorbed in overcoming ohmic resistance 0.000082X588 = 0.048 volt. During active corrosion, if copper and iron are dissolved in the proportions 30 to 40, this would be, in chemical equivalent proportions as 30 -^ 31 . 8 to 40 -f- 28 or as 0.943 to 1.429 since the current divides, in doing mixed electrolysis, in pro- portion to the number of chemical equivalents dissolved or deposited.
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