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Passivating a part means using a process that reduces the chemically reactive properties of its surface. Even though stainless steel has the ability to passivate naturally, there are some additional treatments that can be applied to the part to passivate it better and faster. www.ableelectropolishing.com/services/passivation... As the part will be cleaner, a stronger chromium oxide protective coating can form everywhere on its surface. While passivation works very well for most stainless steel products, it isn't a universal solution. Some stainless steel grades don't contain enough chromium and nickel., making them poor candidates for passivation. The process is also not recommended for brazed or welded parts. See here for info about used hp-packaging... Electropolishing uses electricity to remove a small layer of metal, typically less than 40 μm in thickness, from the steel surface of the part undergoing the process. It involves immersing the part in a solution that can carry..