Magnesium Ring


Jun 26, 2023

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Magnesium reacts with water at room temperature to form magnesium hydroxide and hydrogen gas, but it does so much more slowly than calcium, a similar group 2 metal. This reversible reaction is useful for storing energy because the hydrogen gas can be released in the presence of light (as in the glow-in-the-dark toys).

Magnesium combines with haloalkanes to form organomagnesium compounds known as Grignard reagents. Examples include phenylmagnesium bromide and ethylmagnesium bromide. These reagents are important because they can act as nucleophiles to attack carbon-carbon bonds, such as those in organic molecules.

When magnesium is combined with other elements it forms alloys that are used in industrial applications. It is a major component of the automobile alloy magnesium–aluminum, which is used for the production of magnesium wheels and other parts. It is also found in a variety of medical and dental devices including knee replacements and spinal implants.

In green plants, magnesium is used by a chlorophyll molecule to convert solar energy into chemical energy for cell processes. Magnesium ions are bound to the flat ring of carbon and nitrogen atoms in the chlorophyll molecule, which absorbs the sunlight to generate chemical energy.

Magnesium is easy to hot work and requires fewer forging steps than most other metals, making it more cost effective. It is often extruded into shapes such as missile fuselage connector rings or support frames for military shelters. It can be joined by gas tungsten-arc (TIG) and metal-arc welding, spot welding, and riveting, although special care is needed to minimize stress concentrations and galvanic corrosion failure at the riveted joints.