Structure and Corrosion Resistance of Plasma Nitrided Stainless Steel
作者:
ZhangZ. L.,
BellT.,
期刊:
Surface Engineering
(Taylor Available online 1985)
卷期:
Volume 1,
issue 2
页码: 131-136
ISSN:0267-0844
年代: 1985
DOI:10.1179/sur.1985.1.2.131
出版商: Taylor&Francis
数据来源: Taylor
摘要:
AbstractAISI316 stainless steel has been plasma nitrided at 570°C over a range of processing conditions, and the resultant corrosion properties have been investigated by a potentiodynamic polarization technique. X-ray diffraction and transmission electron microscopy studies have been used to map the process parameters under which a duplex surface compound layer ofγ' phase and austenite is formed. This surface compound layer has better corrosion resistance than a plasma nitrided stainless steel surface, where the normal hardened layer consists of austenite' and chromium nitride precipitates. It has been found that the improvement in corrosion resistance is related to the presence of theγ' nitride. Furthermore; low temperature plasma nitriding at 400°C produces a nitrided layer which has a corrosion resistance equivalent to that of the original material.
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