Passivation will not remove weld-burn or Iron contamination Stainless steels cannot be passivated unless the steel surface is clean and free from contamination and scale from welding operations. Passivation treatments are sometimes specified, to ensure the formation of this protective layer faster than normal but it is important to consider whether this is strictly necessary or not. In good clean air or aerated areas and under many exposure conditions stainless steels will naturally self-passivate. Stainless steels are designed to naturally self-passivate whenever a clean surface is exposed to an environment that can provide enough clean oxygen to form the chromium rich oxide (Cr O) surface layer, on which the corrosion resistance of these alloys depends.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |