If you put metal that is fully submerged in liquid into a microwave, it can still be extremely dangerous and should be avoided. While the liquid may provide some insulation and prevent immediate sparks or arcing, the presence of metal in the microwave can still cause serious problems due to the way microwaves interact with metal.
When microwaves encounter metal objects, they can reflect off the metal surface and cause electrical arcing or sparking. This can lead to several potential hazards:
Fire and Damage: The electrical arcing can generate intense heat, potentially leading to a fire or damaging the microwave itself.
Microwave Malfunction: The sparks and arcing can damage the microwave's electronic components, resulting in the microwave not functioning correctly or becoming a safety risk in future use.
Release of Harmful Substances: If the metal contains coatings or substances that are not microwave-safe, they can release harmful fumes or chemicals into the microwave and contaminate the food.
It's essential to follow proper microwave safety guidelines and never put any metal objects, including fully submerged metal, into the microwave. Instead, use microwave-safe cookware and containers made from materials like glass, microwave-safe ceramics, or microwave-safe plastics for heating or cooking food in the microwave. Always read and follow the manufacturer's instructions and safety guidelines for using your specific microwave oven.