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It is well known that processing variables can affect corrosion resistance of stainless steel PM parts. One of these is nitrogen content in the sintering atmosphere and the resulting absorbed nitrogen in the sintered stainless steel part. Recent investigations show that absorbed nitrogen levels up to about 0.3% in 316L sintered stainless steel have almost no adverse effect on its corrosion resistance; however, once the absorbed nitrogen goes beyond about 0.4%, the sintered stainless steel part corrodes very rapidly.
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Nayar et al. (1990) studied this question.
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