UHPM - 95
J. Phys. IV France 05 (1995) C7-403-C7-407
Influence of Carbon and Nitrogen on Corrosion Resistance of High Purity Fe-50mass % Cr AlloyY. Kato1, T. Ujiro1, S. Satoh1, K. Yamato1 and K. Abiko2
1 Technical Research Lab., Kawasaki Steel Corp., Chiba 260, Japan
2 Institute for Materials Research, Tohoku University, Sendai 980-77, Japan
High purity Fe-50mass%Cr alloys containing (C+N) in the range of 30 to 500 mass ppm were prepared and their corrosion resistance was investigated. Pitting potential in a 3.5mass%NaCl solution at 343K rose with reducing (C+N) content. Alloys containing (C+N) at less than 100 mass ppm did not sustain pitting corrosion. However, alloys containing 500 mass ppm (C+N) corroded severely in 6%FeCl3+1/20N HCl solutions. Heat treatment at 923K was recognized as influencing corrosion resistance due to precipitation of carbonitrides only in the case of the alloy containing 500 mass ppm (C+N).
© EDP Sciences 1995