Influence of Manganese on the Properties of a Vanadium-bearing Ferritic Stainless Steel
Abstract:
For the purpose of further increasing toughness, the influence of manganese contents up to 4% was investigated in a 4% vanadium-bearing experimental ferritic stainless steel. The tensile and formability properties were also studied. The corrosion properties were measured using electrochemical techniques in 1 N H2SO4 and 3.5% NaCl solutions.
No marked effect was found on the tensile and formability properties. In contrast, mangenese has a strong detrimental effect on the general and localized corrosion properties of this 4% vanadium alloy. The passivation characteristics in normal sulphuric acid are much poorer. However, spontaneous passivation occurs in this environment where the manganese content is 0.1%. Similarly, the propensity to pitting corrosion is greatly improved at low manganese Ievels, with pitting potentials superior to both type 304 and 316L stainless steels.
Keywords:
stainless steels, ferritic, vanadium, manganese, mechanical properties, corrosion properties
Author:
E. M. L Emjackson and R Paton
Affiiation
Mintek, Private BagX3015, Randburg21 25. South Africa.
External Link:
External LinkSource:
ISIJ International, Vol. 35, No. 5, 1995, pp.557-563 (Vanitec Publication - V0695)
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