What type of fire extinguisher can create a corrosive compound when discharged?

Class D fire extinguishers, which are specifically designed for use on flammable metal fires, can create corrosive compounds when discharged. The extinguishing agents used in these extinguishers, such as certain powders, can react with metals like sodium or potassium, leading to the formation of corrosive byproducts. It is crucial to use the appropriate extinguishing agent for the specific type of metal fire to avoid dangerous reactions.