High Temperature Corrosion of Inconel 600 in NaCl-KCl Molten Salts

作者：Salinas Solano G; Porcayo Calderon J^*; Gonzalez Rodriguez J G; Salinas Bravo V M; Ascencio Gutierrez J A; Martinez Gomez L

来源：Advances in Materials Science and Engineering, 2014, 2014: 696081.

DOI：10.1155/2014/696081

In this work the corrosion resistance of a high content nickel alloy, Inconel 600, was investigated in mixed NaCl-KCl salts at 700, 800, and 900 degrees C for 100 hours in static air. Investigation was carried out using electrochemical techniques such as polarization curves, rest potential measurements, linear polarization resistance, and electrochemical impedance spectroscopy. Corroded specimens were analyzed by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). Electrochemical measurements showed an increased degradation rate of Inconel 600 with increasing test temperature. SEM and EDS analysis show that the damage experienced by Inconel 600 is greater than that determined by electrochemical measurements. This damage was identified as internal corrosion due to the reaction of Cl-2 with the alloying elements (Cr and Fe); however, at 900 degrees C the internal damage was minor and it was associated with the nickel content in the alloy.

• 出版日期2014