Modern electro plating The principles involved in depositing gold, silver, nickel, copper, brass and other metals, by means of batteries or dynamos; the preparation and management of plating baths, chemicals used, etc . form of cell shown in Fig. 2 is known as thecrowfoot, on account of the manner in which the zinc(positive) element is spread out, to expose a large sur-face of zinc to the solution. It is the form used fortelegraphing, and, therefore, can bereadily obtained any where. Ofcourse, other forms, shapes andsizes can be made at the option ofthe workman. To set up this bat-tery,
Modern electro plating The principles involved in depositing gold, silver, nickel, copper, brass and other metals, by means of batteries or dynamos; the preparation and management of plating baths, chemicals used, etc . form of cell shown in Fig. 2 is known as thecrowfoot, on account of the manner in which the zinc(positive) element is spread out, to expose a large sur-face of zinc to the solution. It is the form used fortelegraphing, and, therefore, can bereadily obtained any where. Ofcourse, other forms, shapes andsizes can be made at the option ofthe workman. To set up this bat-tery, the copper strip, being un-folded so as to form a cross, isplaced at the bottom of a jar, thezinc is suspended from the top asshown, and clean water, containing one-tenth of a satu-rated solution of sulphate of zinc is added, until it nearlytouches the zinc. Sulphate of copper crystals are thenadded until, if the battery is meant to be continuallyused, they nearly cover the top of the copper strip. Ifthe battery is not intended for continual use, it will befound more advantageous to use but a few ounces ofsulphate of copper, as the more concentrated the solu-tion, the greater is the tendency to local action. The. MODERN ELECTRO PLATING. 17 sulphate of zinc may be dispensed with if the battery isnot required for immediate use; in this case, the lattershould be short circuited, and left so for several need of blue vitriol will be indicated by the dis-coloration of the lower stratum of the liquid. It is bestto keep the line marking the two solutions about halfway between the zinc and copper. Should the sulphateof zinc become too concentrated, a portion of it shouldbe removed by means of a syringe qv cup, and its placesupplied by water. To determine when this is neces-sary, a hydrometer may be used. Below 150 the solu-tion is too weak; above 250 it is too strong, and shouldbe diluted. If the battery is taken care of from monthto month, it should not require a thorough clea
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectelectro, bookyear1897
