Which factor is NOT a reason for corrosion in reinforcing bars?

Corrosion in reinforcing bars is primarily influenced by various environmental and material factors. The presence of moisture, for instance, creates an electrochemical environment conducive to corrosion processes, especially when accompanied by the presence of chlorides, which significantly accelerate the corrosion rate.

Substandard materials can also be a significant cause for corrosion. If the quality of the reinforcing bars does not meet the necessary standards, their resistance to corrosion could be compromised, leading to premature failure.

However, the application of excessive heat, while detrimental to concrete properties and possibly leading to stress-related failures, does not directly correlate with the corrosion mechanism of reinforcing bars. High temperatures can affect the bond between the concrete and the rebar or lead to other thermal-related issues, but they do not inherently cause the chemical reactions necessary for corrosion to take place. Thus, this factor is not a valid reason for the corrosion of reinforcing bars.