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Liquid metal corrosion mode and mechanism

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Liquid metal corrosion on the mechanism and the way is different from common chemical corrosion medium, generally no electrochemical reactions, but the erosion, cavitation and embrittlement phenomenon under the action of physical chemistry results it is easy to occur at between liquid metal and metal forming, caused by solid metal damage and contamination of liquid metal, the main corrosion means has the following kinds:

 Liquid metal making machine-Sino Santech Materials

1) Dissolution of liquid metal: this dissolution process is mainly controlled by the solubility of solid metal in liquid metal at a given temperature.

2) Corrosion caused by contamination in liquid metals: the presence of oxygen in liquid metals may lead to oxidation of the surface.

3) Grain boundary corrosion: corrosion caused by a selective reaction between a liquid metal and a solid material along the grain boundary.

4) Transport and deposition of matter: in a liquid metal system, elements are dissolved at high temperatures due to temperature heterogeneity, and then deposited at low temperatures.

5) Liquid metal embrittlement: this is a phenomenon, such as the embrittlement of austenitic stainless steel in the zinc environment.

6) Erosion: mechanical erosion of liquid metal.


Note: some physical processes, such as the physical dissolution of metallic materials in some liquid metals, may also be classified as metallic corrosion. Corrosion of metals in solution is an electrochemical reaction. Contact between metallic materials and liquid metals exists in many practical applications, such as welding, casting, brazing, hot dip plating, etc.In many cases, metal materials and the structures made from them, in the natural environment or under working conditions, due to chemical or electrochemical interaction with the environment medium caused by deterioration and destruction, this phenomenon is called corrosion.

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