Tecnoseal Answers - Materials Part 1: Alloys
Today we begin a speech that will focus on the materials that form the sacrificial anodes, starting from the bases. The anodes are in fact often called "zincs," but in reality zinc is not the only material of which they are composed and even in the case of real "zinc anodes" at the base of the product there is an alloy.
The term alloy refers to a combination, either in solution or in mixture, of two or more elements, of which at least one is a metal and where the resulting material has metallic properties different from those of the relative components.
The most common examples of alloy are: steel (iron-carbon), which has a greater mechanical strength than iron, and brass (copper-zinc), which is harder than copper and brighter than zinc.
Unlike pure metals, many alloys do not have a single melting point, but go through a melting range where the material is a solid and liquid phase mixture. The temperature at which the merger begins is called solidus and the one in which it is completed is called liquidus. Special alloys, defined eutectic, can however be designed with a single melting point.
Sometimes an alloy is designated with the name of the most important metal that composes it. 14-carat gold is actually a gold alloy with other elements and the same applies to the silver used in jewelry, for the aluminum used in the structures and for the zinc used in the anodes.
An alloy can also be classified according to the mutual actions between his atoms (disordered solid solution, ordered solid solution, intermetallic compound or eutectic alloy) or in relation to its solubility in the solid state (completely soluble metals, partial solubility or complete insolubility).
Finally, a fundamental component of the alloys are the alloyings. These are elements that are added to a material liuid state to modify its characteristics so as to make it suitable for the required needs. For example, some typical steel alloyings are: nickel, chrome, molybdenum, titanium, copper, aluminum, tungsten and lead.
...continue next week