This paper provides an overview of modern stochastic and analytical models describing the effect of reinforcement corrosion on the system reliability and residual load-bearing capacity of reinforced concrete beams. Special attention is given to pitting corrosion as the dominant mechanism of strength degradation. Methods for estimating initiation time and progression of corrosion are summarized; criteria for the transition from ductile to brittle failure mechanisms and the assessment of moment redistribution losses are analyzed. Practical recommendations are provided for adjusting safety factors during the design and operation of such structures under high variability conditions.

Keywords: reinforced concrete, rebar, corrosion, pitting, system reliability, degradation, Gumbel distribution, reliability index, moment redistribution