Time-Resolved High-Speed Tomography of Multi-Laminate Scale Formation in Simulated under Deposit Corrosion Environments

Under Deposit Corrosion (UDC) presents a significant issue to carbon steel tubes in industrial boiler systems, however, the fundamental mechanisms are not fully understood. This work uses time-resolved high-speed tomography to investigate iron corrosion products in-situ, in aerated and deaerated environments at 200°C in 0.1M NiCl2 solution. Laminated corrosion structures were observed, in agreement with previous observations and field examples. The oxidation rate increased by 55% in aerated specimens, confirming the presence of oxygen causes an increase in the oxidation rate. This experimental set up provides an opportunity for investigations into complex corrosion mechanisms, for a range of aggressive environments.