Electrochemical characteristics of chromium-saving ferritic stainless steel
- Mie Prefectural Industrial Research Inst., Kuwana, Mie (Japan). Metals Lab.
- Nagoya Municipal Industrial Research Inst., Nagoya, Aichi (Japan). Metallurgy Section
- Daido Inst. of Tech., Nagoya, Aichi (Japan). Dept. of Mechanical Engineering
Effects of Al and Si added to Fe-8% Cr alloys on anodic polarization and decay curves obtained in 0.05 M sulfuric acid (H{sub 2}SO{sub 4}) aqueous solution were studied to explore the possibility of developing a Cr-saving stainless steel. Experimental results showed that the critical current density for passivation decreased with increasing Al and Si contents in Fe-8% Cr alloys. Combined addition of Al and Si decreased the current density more effectively. Addition of Al had a slight effect in making the decay time longer. However, addition of Si made the decay time exceedingly longer. The pitting potential in 3.5% sodium chloride (NaCl) aqueous solution moved in the noble direction with increasing Al and Si contents. Fe-8% Cr alloys containing Al and Si had the corrosion resistance that was equal to or greater than that of Fe-12% Cr stainless steel.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 684439
- Journal Information:
- Corrosion, Vol. 55, Issue 9; Other Information: PBD: Sep 1999
- Country of Publication:
- United States
- Language:
- English
Similar Records
Anodic polarization behavior of austenitic stainless steel alloys with lower chromium content
Effect of alloying elements on stress corrosion cracking of stainless alloys