The corrosion rate of Ni-Resist,(1) Type 2, austenitic cast iron was studied in aerated and deaerated substitute sea water at various velocities using potentiodynamic polarization. The corrosion rate in deaerated sea water was independent of velocity, but corrosion ate and pitting rate in aerated sea water was a strong function of velocity. The pitting rate in aerated sea water was also measured as a function of fluid velocity.

To describe the tendency toward graphitization, the galvanic behavior between graphite and Ni-Resist was determined. These galvanic and pitting corrosion data are used to discuss the graphitization behavior of Ni-Resist in rapidly moving sea water.

Subject
Water, Corrosion rate, Nickel based alloys, Iron, Reservoirs, General corrosion rate, Graphite, Polarization curves, Pitting, Graphitization, Electrodes, Galvanic couple, Types of corrosion
National Association of Corrosion Engineers
1981
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