Influence of high partial pressures of hydrogen sulfide and carbon dioxide on the corrosion-mechanical properties of steels

1984 ◽  
Vol 19 (5) ◽  
pp. 412-414
Author(s):  
V. P. Koval' ◽  
V. Ya. Zhukovskii ◽  
L. A. Kuslitskii
Keyword(s):  
Mechanical Properties ◽  
Carbon Dioxide ◽  
Hydrogen Sulfide ◽  
Partial Pressures

Effect of Environmental Factors on Corrosion Fatigue Performance of Duplex 2507

2012 ◽  
Author(s):  
Ramgopal Thodla ◽  
Carlos Joia ◽  
Palmieri Baptista
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Sulfide ◽  
Corrosion Fatigue ◽  
Environmental Effect ◽  
Fatigue Performance ◽  
Duplex Microstructure ◽  
Partial Pressures ◽  
Frequency Scan ◽  
Austenite Grains ◽  
Weakly Dependent

Corrosion fatigue performance of welded duplex 2507 riser material environments containing high partial pressures of carbon dioxide (100–200 bar) and limited quantity of hydrogen sulfide (0–0.12 bar) is presented in this paper. da/dN vs ΔK at different frequencies as a function of various environmental were studied. In the range of environments studies there was no significant environmental effect on the FCGR. da/dN measurements were performed starting at an initial ΔK of 150Nmm-3/2 and crack growth was readily established suggesting that ΔKth were lower than this value. Frequency scan tests were performed in various environments and the FCGR was found to be weakly dependent on frequency. The highest increase in FCGR was about 3–4x over the air values. The effect of duplex microstructure will also be discussed by comparing results from plate samples of 2507 with differing microstructure. The FCGR was higher with the plate samples which had precipitation of ferrite within the austenite grains which may have led to the higher FCGR. Frequency scan results for the plate samples will be compared with the results from the riser material.

scholarly journals Controlled atmosphere GMAW welding of transportation vehicles and production machines parts made from 30MnB5 steel

2018 ◽  
Vol 216 ◽  
pp. 03001 ◽  
Author(s):  
Evgeny Ivanayskiy ◽  
Aleksei Ishkov ◽  
Aleksandr Ivanayskiy ◽  
Iakov Ochakovskii
Keyword(s):  
Mechanical Properties ◽  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Chemical Composition ◽  
Controlled Atmosphere ◽  
Shielding Gas ◽  
Reducing Atmosphere ◽  
Metal Composition ◽  
Gmaw Welding ◽  
Welding Materials

The paper studies the influence of shielding gas on the composition and the structure of weld joint metal of 30MnB5 steel applied in essential parts of automobiles and tractors. The welding was performed in inert, oxidizing and reducing atmospheres. It was established that TIG welding with argon used as shielding gas did not provide the required mechanical properties when using conventional welding materials. Carbon dioxide during MAG welding caused partial burning of alloying elements. Carbon monoxide used as shielding gas was proved to form reducing atmosphere enabling to obtain chemical composition close to the base metal composition. Metallographic examinations were carried out. The obtained results provided full-strength weld, as well as the required reliability and durability of welded components and joints.

Enhancement of the Mechanical Properties of PEBAX Graphene Nanocomposite Using Supercritical Fluid Assisted Extrusion Polymer Processing Technique

2017 ◽  
Vol 883 ◽  
pp. 75-84 ◽  
Author(s):  
Nireeksha Karode ◽  
Laurence Fitzhenry ◽  
Siobhán Matthews ◽  
Philip Walsh ◽  
Austin Coffey
Keyword(s):  
Mechanical Properties ◽  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Mechanical Performance ◽  
Mechanical Analysis ◽  
Polymer Processing ◽  
Processing Technique ◽  
Graphene Nanocomposites ◽  
Mechanical Tensile ◽  
Supercritical Carbon

Medical tubing used in minimally invasive devices presents a number of design considerations depending on the material used, design requirements (such as sufficient stiffness, flexibility and biocompatibility) and processing conditions. Currently, manufacturing industries adopt co-extrusion systems to meet design specifications, by using multilayer configuration leading to higher cost per device and increased complexity. This paper investigates the mechanical performance of nanocomposites using supercritical carbon dioxide assisted polymer processing technique. The use of innovative medical compounds such as PEBAX graphene nanocomposites have resulted in measurable improvements in mechanical properties. This study also presents the effect of supercritical carbon dioxide on the mechanical and physical properties of the polymer matrix. The mechanical properties have been investigated using dynamic mechanical analysis (DMA) and mechanical tensile test, where sufficient reinforcement was observed depending on the composition of graphene within PEBAX matrix. ATR-FTIR was used to further analyze the effect of supercritical carbon dioxide and interactions within the polymer composite matrix.

Experimental measurements of mechanical properties of carbon dioxide hydrate-bearing sediments

2013 ◽  
Vol 46 ◽  
pp. 201-209 ◽  
Author(s):  
Weiguo Liu ◽  
Jiafei Zhao ◽  
Yuan Luo ◽  
Yongchen Song ◽  
Yanghui Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Dioxide ◽  
Experimental Measurements ◽  
Carbon Dioxide Hydrate ◽  
Hydrate Bearing Sediments

The Effect of Mixing Coal with Biomass in Solid Fuel Briquettes

2013 ◽  
Vol 856 ◽  
pp. 338-342 ◽  
Author(s):  
Chin Yee Sing ◽  
Mohd Shiraz Aris
Keyword(s):  
Mechanical Properties ◽  
Carbon Dioxide ◽  
Power Plants ◽  
Carbon Dioxide Emission ◽  
Palm Kernel ◽  
Value Added ◽  
Calorific Value ◽  
Fuel Properties ◽  
Biomass Fuel ◽  
Palm Kernel Shell

Burning fossil fuel like coal in power plants released carbon dioxide that had been absorbed millions of years ago. Unfortunately, excessive carbon dioxide emission had led to global warming. Malaysia, as one of the major exporters of palm oil, has abundant oil palm mill residues that could be converted into value-added product like biomass fuel briquettes. Fuel briquette with palm kernel shell and palm mesocarp fibre as its main ingredients showed satisfactory fuel characteristics and mechanical properties as a pure biomass fuel briquette. The effects of adding some coal of higher calorific value to the satisfactory biomass fuel briquette were focused in this study. Various coal-biomass fuel blends were used, ranging from 0wt% coal to 50wt% coal. The fuel properties and mechanical properties of pure biomass briquette and briquettes with different amount of coal added were compared experimentally. From the fuel properties tests, it was found that as the coal content in the briquette was increased, the carbon content and calorific value increased. Mechanical property tests on the fuel briquettes showed a mixture of results, with some favored higher portion of coal in the briquette for better handling, transport and storage properties while some favored greater amount of biomass.

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