This paper describes a new method for the non-destructive detection of graphitization corrosion in gray iron
pipe, based on magnetic flux density measurements. Graphitization corrosion is unique to gray cast iron, which
comprises much of the municipal water distribution infrastructure in the United States. Graphitic corrosion is
particularly insidious in that graphitized pipe may appear perfectly sound upon visual inspection, despite being
embrittled and prone to premature failure under load.