Zinc Coated Brass Wire Properties

Coating wire with a special outer coating in electrical discharge processing can provide higher processing power.

Zinc coated brass wire properties.

Like aluminum zinc is highly reactive to oxygen in the presence of moisture and the coating prevents the iron in the steel from further oxidation. Zinc problematic for high vacuum and higher temperatures present in some construction alloys e g. Zinc coated brass wires produce excep tional surface finishes when cutting tungsten carbide and are often utilized for cutting pcd and graphite. Brass and some brazing alloys.

Tends to poison hot cathodes and form conductive deposits on surfaces. 78 zn by weight it usually contains small amounts less than a few percentage points of pb sn cu al and mg to improve. Also this zinc coated wire guarantees stable conductivity. A heavy coating of pure zinc is applied to the outer surface 18 35μm of a copper or brass core.

The first known al loy of zinc brass was first used in cyprus and then in eng land ger many and oth er eu ro pean na tions. Coated wires contain copper or brass cores and are coated with metals such as zinc copper silver. The special coating ensures a very clean finish along the cut surfaces as well as a high performance in terms of cutting speed. Cutting performance is increased according to properties of materials used in this coating.

These wires are also utilized in those circumstances in which brass wires produce an unacceptable brass plating on the workpiece. 3 45 zn by weight it s used in musical instruments valves and hardware. Zinc coated copper edm wire was. Zinc was lat er dis cov ered in eu rope and was soon in tro duced for wide spread use in var i ous spheres.

Even if the zinc coating is scratched off it continues to protect nearby areas of the underlying steel through cathodic protection as well as by forming a protective coating of zinc oxide. Multi phase layered coated wire in addition to the three previously brass phases alpha beta and gamma phase there is one more brass phase that has unique properties that can be utilized in edm applications epsilon phase brass approximately 85 zinc content. All of these phases can be arranged in various combinations to take advantage. Wires with high zinc content make a better edm electrode but edm wire with zinc percentages approaching 40 are difficult to produce so a special method of producing wire with a higher zinc surface has been devised.

At around the same time crafts men in chi na be gan forg ing coins from the met al. Popular zinc alloys are referred to by the acronym zamak for zinc aluminum magnesium and copper. Zinc is rarely used in its pure form but instead is used to form numerous metal casting alloys including brass bronze nickel silver soft solder german silver spring brass and aluminum solder. Any materials that have been zinc coated by galvanization should be avoided or they have the coating removed first.