Corrosion of titanium alloys in pressurised water at 300 °C: Kinetics and modelling

The corrosion of titanium alloys in primary water at 300 degrees C led to a global weight gain due to oxidation and surface precipitation, despite some dissolution. A model was proposed, taking into account the weight contribution of each oxide type to the global mass evolution with exposure time. Based on this model, on mass variation and GD-OES results, a corrosion rate ranging between 2 and 6.6 mu m.year-1 at 300 degrees C for all tested materials was estimated. Due to the simultaneous corrosion of the used stainless steel reactors, a protective ilmenite layer finally precipitated at the surface of the samples.

Automated summary

The corrosion of titanium alloys in primary water at 300 degrees Celsius resulted in a global weight gain due to oxidation and surface precipitation, with a protective ilmenite layer finally precipitating at the surface of the samples.