Anodic polarization behavior of austenitic stainless steel alloys with lower chromium content

Journal Article · Mon Oct 01 00:00:00 EDT 1979 · Corrosion; (United States)

DOI:https://doi.org/10.5006/0010-9312-35.10.443· OSTI ID:5978488

Chen, W Y.C. ^[1]; Stephens, J R

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1. Purdue Univ., Hammond, IN

An experimental program was conducted to determine the feasibility of reducing the chromium content in the widely used commercial Type 304 stainless steel and still maintain comparable corrosion resistance. Potentiodynamic anodic polarization characteristics in 1N H/sub 2/SO/sub 4/ and NaCl solutions were selected as the prime criteria to predict the corrosion resistance of the experimental alloys. Results showed that passivation deteriorated markedly upon removal of chromium from Type 304 stainless steel. Alloy substitutes of Mo and Si were effective in improving the passivation behavior of a stainless steel alloy with 12% Cr. Although Al led to further deterioration of corrosion properties when added to the 12% Cr alloy, an improvement in anodic polarization characteristics was noted when Al was combined with Mo. An optimized composition, austenitic alloy exhibited anodic polarization corrosion properties comparable to those of a commercial Type 304 stainless steel alloy. The optimized composition was 12Cr-10Ni-1.5Si-1Al-2Mo (in Wt%), plus Mn and C at their normal levels. The experimental alloy provides the potential of conserving one-third the chromium used to produce Type 304 stainless steel and still maintains comparable anodic polarization characteristics.

• OSTI ID: 5978488
• Journal Information: Corrosion; (United States), Journal Name: Corrosion; (United States) Vol. 35:10; ISSN CORRA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALKALI METAL COMPOUNDS
ALLOYS
ALUMINIUM ALLOYS
CARBON ADDITIONS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ADDITIONS
MANGANESE ALLOYS
MATERIALS
METALLURGICAL EFFECTS
METALS
MOLYBDENUM
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
PASSIVATION
POWER PLANTS
REFRACTORY METALS
SEMIMETALS
SILICON
SILICON ALLOYS
SODIUM CHLORIDES
SODIUM COMPOUNDS
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
SULFURIC ACID
THERMAL POWER PLANTS
TRANSITION ELEMENTS