(Electroplating) A steel part with surface area A = 130 cm² is to be tin-plated. What average plating thickness will result if 15 amps are applied for 10 min in an acid sulfate electrolyte bath? The cathode efficiency for tin is E = 90% and the plating constant C = 4.21 x 10-2 mm³/amp-s. V = CIt V = ECIt d = V A Typical cathode efficiencies in electroplating and values of plating constant C. Compiled from [18]. Plate Metal Electrolyte Cadmium (2) Cyanide Chromium (3) Chromium-acid-sulfate Copper (1) Gold (1) Nickel (2) Silver (1) Tin (4) Zinc (2) Cyanide Cyanide Acid sulfate Cyanide Acid sulfate Chloride Plating Constant ca Cathode Efficiency % mm³/amp-s (in³/amp-min) 6.73 × 10-² (2.47 × 10-4) X 2.50 × 10-2 (0.92 × 10-4) (2.69 × 10-4) (3.87 × 10-4) (1.25 × 10-4) (3.90 × 10-4) 90 15 98 80 95 100 90 95 7.35 x 10-2 10.6 x 10-² 3.42 x 10-2 10.7 x 10-2 4.21 x 10-2 4.75 × 10-2 (1.54 x 10-4) (1.74 x 10-4) ¹Most common valence given in parentheses (); this is the value assumed in determining the plating constant C. For a different valence, compute the new C by nultiplying the C' value in the table by the most common valence and then dividing by the new valence.

(Electroplating) A steel part with surface area A = 130 cm² is to be tin-plated. What average plating thickness will result if 15 amps are applied for 10 min in an acid sulfate electrolyte bath? The cathode efficiency for tin is E = 90% and the plating constant C = 4.21 x 10-2 mm³/amp-s. V = CIt V = ECIt d = V A Typical cathode efficiencies in electroplating and values of plating constant C. Compiled from [18]. Plate Metal Electrolyte Cadmium (2) Cyanide Chromium (3) Chromium-acid-sulfate Copper (1) Gold (1) Nickel (2) Silver (1) Tin (4) Zinc (2) Cyanide Cyanide Acid sulfate Cyanide Acid sulfate Chloride Plating Constant ca Cathode Efficiency % mm³/amp-s (in³/amp-min) 6.73 × 10-² (2.47 × 10-4) X 2.50 × 10-2 (0.92 × 10-4) (2.69 × 10-4) (3.87 × 10-4) (1.25 × 10-4) (3.90 × 10-4) 90 15 98 80 95 100 90 95 7.35 x 10-2 10.6 x 10-² 3.42 x 10-2 10.7 x 10-2 4.21 x 10-2 4.75 × 10-2 (1.54 x 10-4) (1.74 x 10-4) ¹Most common valence given in parentheses (); this is the value assumed in determining the plating constant C. For a different valence, compute the new C by nultiplying the C' value in the table by the most common valence and then dividing by the new valence.

Modern Physics

3rd Edition

ISBN:9781111794378

Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Publisher:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Chapter12: The Solid State

Section: Chapter Questions

Problem 9P

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