Hi all, I am trying to understand how the process of either crevice or pitting corrosion works (I believe they are quite the same) I understood the part of how they start and what enhances them or how they can be prevented, but I can't understand an actual scenario. Say for example we have stainless steel in a water solution; From which elements and to which elements do the electrons travel? With which elements does the water react? -> and does it always change to hydrogen and hydroxide? How does hydrogen increase the acidity? Why does the steel where the corrosion take place always become the anode? I would really appreciate it if someone could explain this to me! Thanks a lot!