Some oil and gas production systems have critical components (e.g. manifolds, tees, bends, valves)
made out of or internally clad with corrosion resistant alloys for protecting against specific degradation
mechanisms. In this work, finite element analyses and potentiodynamic curves generated with a
mechanistic CO2 corrosion model were used to quantify the threat of galvanically enhanced corrosion on
different carbon steel components partially clad with Alloy 625. Under the conditions evaluated,
uninhibited corrosion rates of carbon steel piping were shown to nearly double near the Alloy 625
interface. The galvanic currents were shown to decrease exponentially with the distance from the
carbon steel–Alloy 625 interface, reaching negligible values after 1.5 times the internal diameter.