: Alloy 926 is a highly alloyed, molybdenum-bearing stainless steel and is used in various industrial fields. For instance, this material is employed as a cladding material for high-diameter pipes in oil and gas industry. One possibility for the production of cladded pipes is the application of a thermo-mechanical rolling process. Recent studies have shown that end rolling at 950 °C with subsequent water cooling are the most promising process parameters for Alloy 926. In that case, the resulting corrosion properties are comparable with a solution annealed material. In the initial phase of the present work, the impact of two different quenching and tempering processes on corrosion properties was determined. After evaluating the microstructure with SEM, the elemental depletion zones adjacent grain boundary precipitates were investigated by means of TEM-EDX linescans. Additionally by applying KPFM the noble behaviour of the precipitated phases could be proved. It was found that the size and the extent of elemental depletion zones are corresponding to the degree of sensitization. The elemental depletion zones of two long-term isothermally annealed conditions were obtained quantitatively and compared with thermo-mechanically rolled samples. After isothermal annealing the chromium and molybdenum depletion adjacent grain boundaries is much more pronounced than after thermo-mechanical rolling. Due to extensive phase precipitation the matrix contains less molybdenum and chromium after long-term isothermal annealing. KPFM measurements show a strong difference in contact potential difference between grain boundary precipitates and matrix. In general, molybdenum depletion was found to be more distinctive than chromium depletion. This fact is referred to the different atomic radii and diffusion coefficients of both elements.