A type of corrosionThe deterioration or degradation of a pipeline caused by chemical or electrochemical reactions with its environment. Corrosion is a significant concern as it ca… anomalyAny irregularity, defect, or abnormal condition identified in a pipeline system that deviates from the expected or normal operating condition. Anomalies in pipe… in pipe in which metal has been removed from the pipe surface where the corrosion cell was assisted by sulfur reducing bacteria.