What occurs during the process of auto ignition?

During the process of auto ignition, the material reaches a temperature high enough to ignite spontaneously without the need for an external ignition source, such as a flame or spark. This heating can occur due to various factors, including chemical reactions, pressure, and heat retention. Essentially, the heat generated internally within the material—often due to exothermic reactions or heat buildup—reaches a critical threshold that causes it to ignite.

This phenomenon is significant in fire behavior because it demonstrates how certain materials can pose risks even without direct exposure to an open flame. Understanding auto ignition is crucial for the prevention of fires, especially in environments where flammable materials are stored or processed.