For a long time, magnesium ingot and its products were only used in small quantities in the aviation, aerospace and military industries due to its high price and technical limitations, so it was called the "power metal". Today, magnesium is the third largest metal engineering material after steel and aluminum, which is widely used in aerospace, automobile, electronics, mobile communication, metallurgy and other fields.

The oxygen in pure magnesium ingot binds easily and forms loose light magnesium oxide. Or paint quality is not high, humid air into the gap, will directly react with magnesium alloy, and easy to generate magnesium hydroxide, these products are similar to the building of concrete and brick surface precipitation alkaline white cream, product precipitation amount is more, the volume will expand, so that the paint film will be broken, so the magnesium alloy coating paint will appear peeling phenomenon.

The oxygen in pure magnesium ingot binds easily and forms loose light magnesium oxide. Or paint quality is not high, humid air into the gap, will directly react with magnesium alloy, and easy to produce magnesium hydroxide.

The commonly used magnesium alloy has non-flammability, especially when used in the parts of steam engine and building materials, which can avoid instantaneous combustion. The proportion of magnesium alloy is 68% of that of aluminum alloy, 27% of that of zinc alloy, and 23% of that of steel. It is often used in automobile parts, 3C product shells, and building materials. Most ultra-thin laptops and mobile phones use magnesium alloy shells.