“Kansite” = Mackinawite, FeS

CORROSION ◽  
1966 ◽  
Vol 22 (7) ◽  
pp. 191-193 ◽  
Author(s):  
CHARLES MILTON
Keyword(s):  
Hydrogen Sulfide ◽  
High Temperature ◽  
Corrosion Product ◽  
Ore Deposits ◽  
Iron Compounds

Abstract “Kansite” is mackinawite, FeS. References to recent publications establishing this and correctly describing this important corrosion compound are given. Besides appearing as a corrosion product, it occurs naturally in tidal sediments, where hydrogen sulfide reacts with iron or iron compounds and in most high temperature copper and nickel ore deposits. It also has been synthesized in the laboratory. Mackinawite has been observed repeatedly for nearly a century, but until 1963 was generally confused with a similar-appearing but much rarer ore mineral, valleriite, CuFeS2, and was described under that name.

NIROSTA 4002

Alloy Digest ◽  
2002 ◽  
Vol 51 (6) ◽  
Keyword(s):  
Hydrogen Sulfide ◽  
High Temperature ◽  
Physical Properties ◽  
Structural Steel ◽  
Oil Industry ◽  
Heat Treating ◽  
Mineral Oil ◽  
Chromium Steel ◽  
Temperature Performance ◽  
High Level

Abstract NIROSTA 4002 is an apparatus structural steel with 13% Cr. It is used for crack-resistant installations in the mineral oil industry because it has a high level of resistance against hydrogen and hydrogen sulfide. This chromium steel requires a smoothened surface free from residues in order to achieve optimal resistance to corrosion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SS-856. Producer or source: ThyssenKrupp Nirosta GmbH.

scholarly journals Effect of SiO2 Dispersion on Chlorine-Induced High-Temperature Corrosion of High-Velocity Air-Fuel Sprayed NiCrMo Coating

CORROSION ◽  
10.5006/2802 ◽  
2018 ◽  
Vol 74 (9) ◽  
pp. 984-1000 ◽  
Author(s):  
Esmaeil Sadeghi ◽  
Nicolaie Markocsan ◽  
Tanvir Hussain ◽  
Matti Huhtakangas ◽  
Shrikant Joshi
Keyword(s):  
High Temperature ◽  
Oxide Scale ◽  
Corrosion Product ◽  
Weight Change ◽  
High Velocity ◽  
Short Circuit ◽  
High Temperature Corrosion ◽  
Lower Weight ◽  
Short Circuit Diffusion ◽  
Highly Porous

NiCrMo coatings with and without dispersed SiO2 were deposited using high-velocity air-fuel technique. Thermogravimetric experiments were conducted in 5% O2 + 500 vppm HCl + N2 with and without a KCl deposit at 600°C for up to 168 h. The SiO2-containing coating showed lower weight change as a result of formation of a protective and adherent Cr-rich oxide scale. SiO2 decelerated short-circuit diffusion of Cr3+ through scale’s defects, e.g., vacancies, and promoted the selective oxidation of Cr to form the protective Cr-rich oxide scale. Furthermore, the presence of SiO2 led to less subsurface depletion of Cr in the coating, and accordingly less corrosion of the substrate. The formed corrosion product on the SiO2-free coating was highly porous, non-adherent, and thick.

scholarly journals Superconducting Hydrides Under Pressure

2020 ◽  
Vol 11 (1) ◽  
pp. 57-76 ◽  
Author(s):  
Chris J. Pickard ◽  
Ion Errea ◽  
Mikhail I. Eremets
Keyword(s):  
Hydrogen Sulfide ◽  
High Temperature ◽  
Critical Temperature ◽  
First Principles ◽  
High Temperature Superconductors ◽  
Microscopic Structure

The measurement of superconductivity at above 200 K in compressed samples of hydrogen sulfide and in lanthanum hydride at 250 K is reinvigorating the search for conventional high temperature superconductors. At the same time, it exposes a fascinating interplay between theory, computation, and experiment. Conventional superconductivity is well understood, and theoretical tools are available for accurate predictions of the superconducting critical temperature. These predictions depend on knowing the microscopic structure of the material under consideration, which can now be provided by computational first-principles structure predictions. The experiments at the megabar pressures required are extremely challenging, but, for some groups at least, permit the experimental exploration of materials space. We discuss the prospects for the search for new superconductors, ideally at lower pressures.

Prospects for the use of natural ferromanganese sorbents of hydrogen sulfide for high-temperature cleaning of syngas

2012 ◽  
Vol 46 (2) ◽  
pp. 143-148 ◽  
Author(s):  
A. N. Epikhin ◽  
I. O. Krylov ◽  
A. A. Somov ◽  
S. I. Suchkov ◽  
K. V. Timashkov ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
High Temperature
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