What is a noted issue with potassium chloride-based dry chemical agents?

Potassium chloride-based dry chemical agents are recognized for their corrosive properties, which makes this the correct choice. These agents can cause damage to certain materials, particularly metals and electrical equipment, when they are used. This corrosion can be significant, especially in environments like industrial settings or where sensitive electronic devices are present. Therefore, while potassium chloride can be effective in certain fire situations, users must be aware of the potential for corrosion and take appropriate measures to mitigate these risks after use.

The other options do not accurately capture the characteristics of potassium chloride-based dry chemical agents; they may not be entirely ineffective or less effective compared to other agents, and they are not non-corrosive, which is a critical aspect to consider in fire suppression scenarios.