Organ of human body
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| STAINLESS STEELS Stainless steel is an iron (Fe) based alloy with at least 11 wt. % chromium (Cr). It may also contain several other alloying elements, such as nickel (Nib bmolybdenum (Mo),and manganese (Mn) High corrosion resistance , in combination with good mechanical properties, is the main reason for its wide use also in relatively aggressive environments such as seawater, food, or the human body. Even though the corrosion resistance is high, or very high fora given grade, low levels of metals can be released from the stainless steel surface in contact with different fluids. Metal release is here defined as all metal species released from the stainless steel surface into solution due to electrochemical (metal corrosion/oxidation), chemical/electrochemical (dissolution of the surface oxide, or physical processes removal of metal or oxide particles via, e.g., friction. Knowledge on the extent of metal release is of highest concern insensitive environments such as within the human body, upon skin contact, and if released into food and drinking water, as it, for instance, may induce allergic and toxic reactions. Specific stainless steel grades are designed and used in biomedical applications, such as orthopedic, dental or cardiovascular implants, to achieve biocompatibility and maintained function with time . Download 5.74 Mb. Share with your friends:
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