Which of the following is typically not a danger of munitions items?

Corrosion is typically not considered a direct danger of munitions items in the same way that fire, excessive heat, and impact are. While corrosion can lead to degradation of munitions over time, it is generally viewed as a long-term issue that affects the integrity and performance of the stored items rather than an immediate danger. Fire presents a high-risk scenario due to the flammability of many munitions; excessive heat can lead to chemical reactions or degradation of materials that could trigger dangerous situations; and impact can cause accidental detonations or damage to munitions, making them hazardous. Thus, corrosion, although it can compromise munition safety, does not present the same level of immediate danger as the other options.