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General purpose braze extensively used for joining copper, brass, bronze, nickel-silver, steel and nonferrous alloys. Suitable for dip-brazing of wires in electronics; the flow point matches melting point of borax , which is used as a flux to cover the surface of the molten metal in the pot.
Islamic Golden Age brass astrolabe Brass lectern with an eagle. Attributed to Aert van Tricht, Limburg (Netherlands), c. 1500.. Brass is an alloy of copper and zinc, in proportions which can be varied to achieve different colours and mechanical, electrical, acoustic and chemical properties, [1] but copper typically has the larger proportion, generally 66% copper and 34% zinc.
Copper-rich alloys prone to stress cracking by ammonia. Silver-rich brazes (above 67.5% Ag) are hallmarkable and used in jewellery; alloys with lower silver content are used for engineering purposes. Alloys with copper-zinc ratio of about 60:40 contain the same phases as brass and match its color; they are used for joining brass.
Copper zinc water filtration is a high-purity brass water filtration process that relies on the redox potential of dissolved oxygen in water in the presence of a zinc anode and copper cathode. It uses dissolved impurities within water as constituent substrate, which are reduced to more physiologically inert compounds.
Initially, the tubes were made of unalloyed copper. By 1870, Muntz metal, a 60% Cu-40% Zn brass alloy, was used for condensers in seawater cooling. Admiralty metal, a 70% Cu-30% Zn yellow brass alloy with 1% tin added to improve corrosion resistance, was introduced in 1890 for seawater service. [2]
The copper can get dissolved in water in trace amounts when the water is stored in copper vessels for a long period of time. The process is known as the “ oligodynamic effect ”. [ 6 ] Kalai protects from food poisoning and blackening of copper vessels by preventing direct contact of air with the copper or brass surface.
To combat this, arsenic or tin can be added to brass, or gunmetal can be used instead. Dezincification resistant brass (DZR), also known as Brass C352 is an alloy used to make pipe fittings for use with potable water. Plumbing fittings that are resistant to dezincification are appropriately marked, with the letters "CR" (Corrosion Resistant) or ...
In fact, it is considered to be the reference alloy for machinability. C360 brass contains 3% lead. Brass used in pipe fittings for potable water systems contained lead until very recently when it began to be removed to meet RoHS standards.Gcronau 10:13, 19 August 2015 (UTC)