. Electroplating; a treatise for the beginner and for the most experienced electroplater. Fig:. 1. Connections for Electroplating: wire is hung a piece of the same metal as that in thesolution. The articles to be plated are connected by awire to the negative pole of a battery and the metal plateis connected in the same way to the positive pole of thebattery. Now the metallic solution in the tank will conduct theelectricity, and so a complete electric circuit is formed 12 INTRODUCTION by which the current flows from the positive pole of thebattery through the connecting wire to the metal plateh
. Electroplating; a treatise for the beginner and for the most experienced electroplater. Fig:. 1. Connections for Electroplating: wire is hung a piece of the same metal as that in thesolution. The articles to be plated are connected by awire to the negative pole of a battery and the metal plateis connected in the same way to the positive pole of thebattery. Now the metallic solution in the tank will conduct theelectricity, and so a complete electric circuit is formed 12 INTRODUCTION by which the current flows from the positive pole of thebattery through the connecting wire to the metal platehanging in the tank. From the metal plate, it flows throughthe solution to the article to be plated and thence backthrough the other wire to the negative pole of the battery—completing the circuit. Fig. i shows the path of thecurrent in an electroplating circuit. The metal plate attached to the positive pole of the bat-tery is called the anode and the objects to be plated inthe tank are called cathodes. The use of these termscan be understood if we think of the battery as being below. Fig. 2. Simple Electroplating Outfit the plating tank, as shown in the illustration. Anode isa Greek word meaning the way up—from the batteryto the solution—and cathode means the way the action of the current, particles of metal are attractedfrom the solution to the articles to be plated, and at thesame time an equal amount of the same metal is thrownoff the anodes into the solution. Thus, although the solu-tion is being constantly robbed of metal, it is being fed atthe same time, and so its strength is maintained. Ofcourse, the anodes must be plates of the same metal asthat contained in the solution; thus, silver anodes in a sil- INTRODUCTION 13 ver solution, nickel anodes in a nickel solution, etc. Theprocess by which the electric current affects the decompo-sition of the metal to be deposited on the articles to beplated is called electrolysis. To make all this very plain, and to st
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