OCR Text |
Show Galvanizing Brass and Copper. Copper and brass may be coated with metallic zinc in the following manner: man-ner: Place finely divided zinc in a nonmetalllc vessel, and cover it with a concentrated solution of sal ammoniac. am-moniac. This is heated to the boiling point, and the copper or brass articles are Introduced. A few minutes In the boiling bath will -suffice to produce a firm and brilliant covering over the surface of the work. The zinc can be reduced to the requisite fineness by pouring the melted metal into an iron mortar and pounding It with an Iron pestle until the solid mass has been granulated to the desired fineness. Popular Mechanics Magazine. |