The influence of a KCl-rich environment on the corrosion attack of 304 L: 3D FIB/SEM and TEM investigations

This study investigates the intergranular corrosion of a stainless steel (304 L) in presence KCl(g)/KCl(s) at 600 °C by using FIB/SEM to perform 3D reconstruction/tomography grain boundary attacks combination with TEM. The investigation shows that FIB/TEM offers great potential for complex features, i.e. corrosion. initiation and propagation attack occurred very rapidly below an intact secondary protection. No large accumulations metal chlorides were observed regions. Instead, indications rapid alloy diffusion regions observed.