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http://dx.doi.org/10.9726/kspse.2012.16.5.076

Effect of Alloying Elements of Mn and Ni on the Pitting Corrosion Resistance of 22Cr Lean Duplex Stainless Steel  

Ahn, Y.S. (Department of Materials Science and Engineering, PuKyong National University)
Bae, K.K. (Department of Materials Science and Engineering, PuKyong National University)
Publication Information
Journal of Power System Engineering / v.16, no.5, 2012 , pp. 76-82 More about this Journal
Abstract
Duplex stainless steels have the dual microstructure of austenite and ferrite phases. This steel exhibits generally a high corrosion resistance and higher mechanical strength compared with austenitic stainless steels. The steels used in the investigation have the chemical composition of Fe-22Cr-xNi-yMn-0.2N in which the contents of Ni and Mn were varied with maintaining the equal [Ni/Cr] equivalent. The fraction of ferrite phase was increased with the increase of annealing temperature. The impact factor of Mn element on the [Ni] equivalent was amended on the basis of the results of the investigation. 4Mn-2Ni alloy showed the highest pitting corrosion resistance. The fraction ratio, grain size and misorientation angle between grains were measured, and the correlation with pitting potential was investigated.
Keywords
Pitting corrosion resistance; Duplex Stainless Steel; Alloy composition;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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