... and temperature. 15 03 2025 02 05 2025 nickel alloys localized corrosion sulfur crevice corrosion pitting Effects of temperature and thiosulfate concentration on the crevice corrosion of alloy 800 under layup conditions Facundo E. Herrera Mauricio Chocron , Martin A. Rodríguez and Mariano...

...). Results of this laboratory study led to better understanding of the corrosion mechanisms operating on superheaters and reheaters in coal-fired boilers due to the coexistence of sulfur and chlorine in coal. A new corrosion mechanism, i.e., “active sulfide-to-oxide corrosion mechanism,” accounts...

... range of sulfur and chlorine contents were determined. These combustion conditions were then closely reproduced in a series of 1,000 h laboratory corrosion tests to evaluate the materials performance of different furnace-wall alloys and weld overlays at 399, 454, and 510°C (750, 850, and 950°F). Results...

... of mackinawite forms on the surface and magnetite/maghemite are chemically converted to sulfide and sulfur, leading to a slow increase in corrosion rate. carbon steel corrosion potential corrosion rate microbially induced corrosion pipelines scanning electron microscopy sulfur Gas transmission...

... intergranular corrosion manganese nitric acid phosphorus segregation silicon sulfur transpassive corrosion Transpassive corrosion is a phenomena observed in stainless steels (SS) exposed to high-temperature, concentrated nitric acid (HNO₃) solutions with and without highly oxidizing...

...) crystalline samples. NACE International 2002 amorphous structures anodic polarization cyclic polarization metallic glass nanocrystalline materials passivity polarization resistance sulfur Metallic glasses are known for their particular structure and for their magnetic properties...

... formation of active sites. ^2-6 austenitic stainless steel carbon impurity intergranular corrosion nitric acid nitrogen phosphorus segregation sulfur transpassive corrosion FIGURE 4 Surface appearance of solution-annealed HP 18%Cr-14%Ni alloys containing: (a) 0.05% C and (b...

.... In addition, the ash deposits can react with inorganic species such as sulfur dioxide (SO₂). In this study, 5 different fuels with different Cl, S, and alkali contents were burned in a 0.1 MW_th bench-scale FBC system. The effects of coal types, temperature, position, and exposure...

... to intergranular SCC in PWR primary water. NACE International 2000 austenitic stainless steel impurity effect phosphorus pressurized water reactor primary water silicon stress corrosion cracking sulfur Revealing the effect of chemical composition on IASCC is important for developing better...

...K. Liu; W. Xie; W.-P. Pan; J.T. Riley The possibility of fireside corrosion in power plant boiler components is always a major concern when the fuels include high-sulfur and high-chlorine coals (or refuse waste). Sulfur and chloride products may play important roles especially in fireside corrosion...

...Z. Fang; R.W. Staehle Effects of the valence of sulfur, as sulfur oxyanions and sulfide (S^2– or HS^–), on passivation of alloys 600, 690, and 800 (UNS N06600, N06690, and N08800) in various heat treatments were studied at 25°C and 95°C using potentiodynamic polarization...

...C.S. Brossia; R.G. Kelly The influence of alloy sulfur content and bulk solution composition on crevice corrosion initiation of type 304 (UNS S30400) stainless steel (SS) in neutral chloride solutions was determined experimentally, with particular emphasis on the solution chemistry that develops...

...V. Mitrovic-Scepanovic; R.J. Brigham A grid of experimental alloys containing nominally 17% Cr and 7.5% Ni in combination with low (0.01%) and high (0.1%) nitrogen and low (0.004%) and high (0.01%) sulfur was prepared with concentrations of 0.25%, 0.5%, 0.75%, and 1% Mn. The pitting resistance...

... of hydrogen sulfide (H₂S) in the atmosphere renders protection through sulfur adsorption on surfaces, which retards and suppresses important steps in the reaction mechanism of metal dusting. NACE International 1995 adsorption austenite carburization cold work ferrite graphitization...

...J. García-Antón; J. Monzó; J.L. Guiñón The corrosiveness of sulfur compounds present in petroleum products is measured using the ASTM D 130 copper strip test, which is based on discoloration of a standard copper strip immersed into a petroleum product at 50°C for 3 h. In the present work, scanning...

...N.J.E. Dowling; C. Duret-Thual; G. Auclair; J.-P. Audouard; P. Combrade Several grades of 18% chromium-8% nickel stainless steel (SS) with varying sulfur contents and immersed in 3% sodium chloride (NaCl) demonstrated essentially passive behaviors, with local depassivation events monitored as sharp...

... been performed, and only estimates exist for the dissolution rate of MnS and the resulting sulfur (S) levels in the crack. In the present work, microsampling of the crack tip solution in ASTM A533(B) low-alloy steel (0.013% S) exposed to constant and cyclic loading in 288°C water under various test...

.... Trap densities were consistent qualitatively with levels of sulfur (S) and phosphorus (P) in the two alloys. This finding supported an assumption that S and P provided the primary irreversible traps. July 1993 October 1993 1 2010 NACE International 1994 acetic acid alloy K-500...

... and/or cracking process was identified by means of electrochemical measurements. Among various environmental constituents, the influence of elemental sulfur on the dynamics and kinetics of the cathodic reaction was clarified. The role of elemental sulfur in the growth of pits and SCC was examined in detail...