What is alloy of mercury?

There is no known alloy of mercury. This is because mercury is a liquid at room temperature and most metals are solid, making it difficult to create a stable alloy. However, small amounts of mercury can be added to certain metals to improve their properties, such as the corrosion resistance of aluminum or the fluidity of some types of solder. This process is called amalgamation and it involves dissolving the metal in liquid mercury to create a homogeneous mixture. However, amalgamation is typically avoided due to the toxicity of mercury.