Electropolishing of Duplex Stainless Steel
Many pharmaceutical and biotech applications require that product-contact surfaces be electropolished. Therefore, the ability to provide a high-quality electropolished surface is an important material property.
2205 duplex stainless steel can be electropolished to a finish of 0.38 microns or better, a finish that meets or exceeds ASME BPE standard surface finish requirements for electropolished surfaces. Although 2205 duplex stainless steel can easily meet the surface finish requirements of the pharmaceutical and biotech industries, the electropolished 2205 stainless steel surface is not as bright as the electropolished 316L stainless steel surface. This difference is due to the slightly higher metal dissolution rate of the ferrite phase compared to the austenite phase during electropolishing.
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