Effects of Hydrogen on Disorder of Passive Films and Pitting Susceptibility of Type 310 Stainless Steel

2001 ◽  
Vol 148 (1) ◽  
pp. B29 ◽  
Author(s):  
Q. Yang ◽  
J. L. Luo
Keyword(s):  
Stainless Steel ◽  
Passive Films ◽  
310 Stainless Steel

Effects of Hydrogen on Semiconductivity of Passive Films and Corrosion Behavior of 310 Stainless Steel

1999 ◽  
Vol 146 (6) ◽  
pp. 2107-2112 ◽  
Author(s):  
M. Z. Yang ◽  
J. L. Luo ◽  
Q. Yang ◽  
L. J. Qiao ◽  
Z. Q. Qin ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Behavior ◽  
Passive Films ◽  
310 Stainless Steel

NiAl precipitation in Fe-12w/o Cr-5w/o Ni-4w/o Al

1983 ◽  
Vol 41 ◽  
pp. 202-203
Author(s):  
L.E. Murr ◽  
J.S. Dunning ◽  
S. Shankar
Keyword(s):  
Solid Solution ◽  
Stainless Steel ◽  
Stainless Steels ◽  
Alloy Composition ◽  
Chromium Content ◽  
Scale Up ◽  
Optical Metallography ◽  
Property Evaluation ◽  
310 Stainless Steel ◽  
Microstructural Studies

Aluminum additions to conventional 18Cr-8Ni austenitic stainless steel compositions impart excellent resistance to high sulfur environments. However, problems are typically encountered with aluminum additions above about 1% due to embrittlement caused by aluminum in solid solution and the precipitation of NiAl. Consequently, little use has been made of aluminum alloy additions to stainless steels for use in sulfur or H2S environments in the chemical industry, energy conversion or generation, and mineral processing, for example.A research program at the Albany Research Center has concentrated on the development of a wrought alloy composition with as low a chromium content as possible, with the idea of developing a low-chromium substitute for 310 stainless steel (25Cr-20Ni) which is often used in high-sulfur environments. On the basis of workability and microstructural studies involving optical metallography on 100g button ingots soaked at 700°C and air-cooled, a low-alloy composition Fe-12Cr-5Ni-4Al (in wt %) was selected for scale up and property evaluation.

SANDVIK 310/T22

Alloy Digest ◽  
1994 ◽  
Vol 43 (6) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Composite Tube ◽  
Design Load ◽  
Inside Diameter ◽  
Superheater Tube ◽  
310 Stainless Steel ◽  
Outside Diameter ◽  
Load Carrier

Abstract SANDVIK 310/T22 is a composite tube consisting of Type 310 stainless steel for corrosion resistance on the outside diameter and having T22 (21/4 Cr-1Mo) to A213 on the inside diameter to act as the superheater tube and design load carrier. This datasheet provides information on composition. It also includes information on forming and joining. Filing Code: SA-477. Producer or source: Sandvik.

Elevated Temperature Corrosion Of Type 310 Stainless Steel By Vanadium Compounds

CORROSION ◽  
1961 ◽  
Vol 17 (4) ◽  
pp. 185t-187t ◽  
Author(s):  
HUGH L. LOGAN
Keyword(s):  
Stainless Steel ◽  
Water Vapor ◽  
Elevated Temperature ◽  
Chemical Analysis ◽  
Steel Slag ◽  
Vanadium Compounds ◽  
Nickel Iron ◽  
310 Stainless Steel ◽  
Boundary Penetration ◽  
Iron And Manganese

Abstract The mechanism of the attack of Type 310 stainless steel by vanadium compounds has been studied. Catastrophic attack by a mixture of 67 wt. percent V 2 O 5 + 33 wt. percent of NaVO 3 occurred at temperatures of 1900 to 2000 F if the steel had previously been oxidized and air and water vapor were present. In some instances an unidentified phase formed at the steel-slag interface attacked the steel by grain boundary penetration and adsorption of steel grains. A chemical analysis of the slag showed that the chromium-iron and manganese-iron ratios were the same in the slag as in the steel. The nickel-iron ratio, however, was higher in the slag than in the steel. This would suggest the possibility that nickel is selectively absorbed by the slag prior to general attack. 4.2.3; 4.3.3, 3.5.9, 6.2.5

scholarly journals Effect of Mechanical Surface Treatments on the Surface State and Passive Behavior of 304L Stainless Steel

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 135
Author(s):  
Kathleen Jaffré ◽  
Benoît Ter-Ovanessian ◽  
Hiroshi Abe ◽  
Nicolas Mary ◽  
Bernard Normand ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Stainless Steel ◽  
Surface State ◽  
Electrochemical Impedance ◽  
Passive Films ◽  
Surface Finishing ◽  
Ultrafine Grain ◽  
304L Stainless Steel ◽  
Passive Behavior

The effect of dry grinding on 304L stainless steel’s passive behavior is compared to two other surface finishing (mechanical polishing down to 2400 with SiC emery paper and 1 µm with diamond paste, respectively). The characterization of the surface state was performed using scanning electron microscopy, transmission electron microscopy, 3D optical profilometer, and X-ray diffraction. Results indicate that each surface treatment leads to different surface states. The ground specimens present an ultrafine grain layer and a strong plastic deformation underneath the surface, while an ultrafine grain layer characterizes the subsurface of the polished specimens. Grinding induces high residual compressive stresses and high roughness compared to polishing. The characterization of the passive films was performed by electrochemical impedance spectroscopy and Mott–Schottky analysis. The study shows that the semiconductor properties and the thickness of the passive films are dependent on the surface state of the 304L stainless steel.

Erosion of 310 Stainless Steel at 975°C in Combustion Gas Atmospheres

1977 ◽  
Vol 99 (2) ◽  
pp. 126-132 ◽  
Author(s):  
L. K. Ives
Keyword(s):  
Stainless Steel ◽  
Corrosion Process ◽  
Combustion Gas ◽  
Scanning Electron Microscopy Examination ◽  
Test Conditions ◽  
310 Stainless Steel ◽  
Component Test ◽  
Multiple Component ◽  
Identical Test ◽  
Microscopy Examination

Erosion tests were conducted on 310 stainless steel in combustion gas atmospheres at 975°C. SiC particles of 100 mesh (150 μm) size were employed over a velocity range of 15–70 m/s at a 90 deg (perpendicular) angle of impingement. A comparison is made with results obtained at 25°C in air using the same test equipment. Scanning electron microscopy examination of the eroded surfaces revealed important information concerning the nature of the erosion-corrosion process. A multiple component test specimen is described for application in comparing alloys under nearly identical test conditions.

Oxide Films on Stainless Steels★

CORROSION ◽  
1956 ◽  
Vol 12 (3) ◽  
pp. 41-53 ◽  
Author(s):  
THOR N. RHODIN
Keyword(s):  
Stainless Steel ◽  
Stainless Steels ◽  
Alloy Composition ◽  
Oxide Films ◽  
Film Structure ◽  
Passive Films ◽  
Film Properties ◽  
Film Composition ◽  
Corrosion Resistant ◽  
Compositional Properties

Abstract Oxide films on stainless steels have been classified into three types according to film thickness, film structure, film composition, and influence of the film on resistance to corrosion. Compositional properties of oxide films isolated from surfaces of stainless steels were studied using specially developed microanalytical techniques. Properties of passive films on stainless steel were evaluated and the effects of alloy composition and surface treatment on other types of films on Types 304, 316, and 347 stainless steels were studied. The influence of corrosion in various media was correlated with film compositional properties. Composition of films after immersion in acids was found to be related to film composition prior to immersion. The effect of immersion depended on the nature and intensity of corrosion and was reflected most sensitively by the iron and silicon contents of the films. The conclusion was made that film properties indicate strongly the capacity of austenitic stainless alloys to develop corrosion-resistant surfaces in certain environments.

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