Which extinguisher is known for being corrosive?

The sodium bicarbonate extinguisher is known for its corrosive properties because it releases sodium ions when it reacts with moisture. This is particularly important when considering the types of materials that may come into contact with fire-fighting agents. Sodium bicarbonate can lead to corrosion on metals if not properly cleaned up after use, making it a consideration for firefighters when dealing with specific fire scenarios. This feature sets it apart from other extinguishers, which may not have the same level of potential for corrosion.

In contrast, mono ammonium phosphate is often used in multi-purpose extinguishers and is not considered corrosive to the same degree. Potassium acetate extinguishers are designed for Class K fires, primarily involving oils and fats, and they also do not exhibit corrosive characteristics. Lithium alloy extinguishers are specialized for lithium fires and are constructed to avoid corrosiveness in those scenarios.