scholarly journals Analysis and Alternate Selection of Nanopowder Modifiers to Improve a Special Protective Coating System

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
S. P. Bardakhanov ◽  
V. N. Goverdovskiy ◽  
C.-M. Lee ◽  
O. C. Lee ◽  
V. T. Lygdenov
Keyword(s):  
Protective Coating ◽  
Comparative Modeling ◽  
Chemical Bonds ◽  
Diffusion Capacity ◽  
Physical Methods ◽  
Adsorption Mechanisms ◽  
System Life ◽  
Factory Testing ◽  
Multiparameter Analysis ◽  
Selection Of

This paper presents a practical approach for rational choice of silica nanopowders as modifiers to control and improve the performance of protective coating systems operating in harsh environmental conditions. The approach is based on the multiparameter analysis of nanoparticle reactivity of similar silica synthesized by using chemical and physical methods. The analysis indicates distinct adsorption centers due to the differences in the particles formation; the features of the formation and adsorption mechanisms lead to higher diffusion capacity of the nanoparticles, synthesized by physical methods, into a paint material and finally result in stronger chemical bonds between the system elements. The approach allows reducing the consumption of paint materials by 30% or more, at least 2-3 times increasing of the coating adhesion and hence the system life. Validity of the approach is illustrated through the data obtained from comparative modeling, factory testing, and practical use of modified systems.

Research on Tubing and Casing Corrosion in Sour Gas Reservoirs and Corrosion-Resistant Material Selection

2013 ◽  
Vol 690-693 ◽  
pp. 1516-1519
Author(s):  
Ling Feng Li
Keyword(s):  
Material Selection ◽  
Gas Production ◽  
Resistant Material ◽  
Gas Reservoirs ◽  
Gas Well ◽  
Corrosion Resistant ◽  
System Life ◽  
Sour Gas ◽  
Selection Of

For natural gas well in sour gas reservoirs, very serious corrosion in the gas well string is an important factor of gas production system life. In order to ensure the long-term development of gas wells, this paper mainly introduces the tubing and casing corrosion in sour gas reservoirs, corrosion-resistant material selection of tubing and casing in sour gas reservoirs and proposes the optimization idea and technique of tubing material selection.. By taking W 63 well as an example, this paper optimizes the material selection of production casing for W 63 well. For application, the optimal materials of gas well string in W 63 well have good performance of corrosion resistance.

scholarly journals Prevention of the corrosion of trailers and trailers used in transport of road

2019 ◽  
Vol 20 (1-2) ◽  
pp. 199-202
Author(s):  
Leszek Gil ◽  
Ireneusz Pawełczak ◽  
Michał Jaczewski
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Protection ◽  
Protective Coating ◽  
Road Transport ◽  
Operating Conditions ◽  
Thermal Loads ◽  
Chemical Substances ◽  
Metal Elements ◽  
Selection Of

The article discusses solutions for anti-corrosion protection of trailer and trailer’s elements. Due to the different operating conditions, the protective coating of metal elements must be resistant to chemical substances in a dry and wet environment that stimulates corrosion processes. Corrosion resistance must also be ensured on elements subjected to locally high stresses and thermal loads that prevail during the operation of trailers in road transport. The study also defines the criteria and methods for the selection of coatings to protect surfaces exposed to corrosion.

scholarly journals Research on Anti-Corrosion and Coating Technology of Outer Pipes of Submarine Pipelines Shallow Sea by Physical Testing

2021 ◽  
Vol 2083 (2) ◽  
pp. 022102
Author(s):  
Xiaobo Jiang ◽  
Qingguo Yin ◽  
Xiaochun Zhang ◽  
Xiaoyan Wang ◽  
Shaomin Yang
Keyword(s):  
Engineering Design ◽  
Marine Environment ◽  
Protective Coating ◽  
Structural Characteristics ◽  
Submarine Pipeline ◽  
Shallow Sea ◽  
Coating Technology ◽  
Construction Methods ◽  
Physical Testing ◽  
Selection Of

Abstract In this paper, by discussing the characteristics of the beach and shallow sea marine environment, combining with engineering design and application, studying the anti-corrosion coating and coating technology of the outer pipe of the pipeline, and analyzing the design of the concrete counterweight layer of the submarine pipeline. According to the submarine pipeline of the environment, structural characteristics, construction methods, etc, the reasons for the damage of the external protective coating under certain conditions are explained, so as to select the external protective coating more reasonably, and provide data for the anti-corrosion and coating selection of the marine pipeline.

scholarly journals Curing Temperature Effects on the Tensile Properties and Hardness of γ−Fe2O3 Reinforced PDMS Nanocomposites

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Yvonne Konku-Asase ◽  
Abu Yaya ◽  
Kwabena Kan-Dapaah
Keyword(s):  
Mechanical Properties ◽  
Quantitative Data ◽  
Biomedical Applications ◽  
Processing Parameters ◽  
Curing Temperature ◽  
Background Information ◽  
Chemical Bonds ◽  
Research Groups ◽  
Preparation Conditions ◽  
Selection Of

The mechanical properties of plain polydimethylsiloxane (PDMS) and its nanocomposites have been exploited for various theranostic biomedical applications. Although several research groups have investigated the effects of preparation conditions—especially curing temperature and time—on bulk mechanical properties of plain PDMS, there are no reported similar studies for its nanocomposites. In this study, mechanical properties of PDMS reinforced by different volume fractions (ϕmnp=0–2 vol. %) of γ-Fe2O3 nanoparticles (NPs) were investigated and quantitative data presented for different curing temperatures (25, 100, and 150°C). To a large extent, γ-Fe2O3 NPs were uniformly dispersed in the PDMS matrix with no primary chemical bonds formed. For the temperatures tested, the data showed an increase for Young’s modulus (E) of about 170% (1.36–3.71 MPa) and a decrease of the ultimate tensile strength (UTS) of about 65% (6.48–2.93 MPa) with increasing concentration of the NPs. Furthermore, hardness (Shore A) (H) increased with curing temperature but decreased with concentration. Based on the findings, we conclude that the linear relationship between the calculated mechanical properties (E, UTS, H) and small ϕmnp is independent of the curing temperature. The experimental data provide useful background information for the selection of processing parameters for PDMS nanocomposite fabrication.

scholarly journals SYSTEMATIC APPROACH TO ASSESSING THE QUALITY OF APPLYING A PROTECTIVE COATING FOR RESTORATION DETAILS OF TRANSPORT DESTINATION

2014 ◽  
Author(s):  
Andrey Dyomin
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Protective Coating ◽  
Systematic Approach ◽  
Structural Model ◽  
Protective Coatings ◽  
Comprehensive Approach ◽  
Technology Selection ◽  
Selection Of

The article presents a comprehensive approach to assessing the quality of the application andreinforcing anti-friction coatings in one technological cycle of technology recovery of crankshafts.Found that the use of methods of hardening and application wear-resistance coating must complysatisfactory level of performance tribosystems with acceptable processability, maintainability andeconomical efficiency processes of manufacturing and repair detail. Use of protective coatings in themanufacture and renovation of machinery parts makes demands for coatings and technologies for theirapplication, the need to ensure receipt of the surface layer with stable physical and mechanical properties.Proposed to assess the quality crankshafts, which were manufactured and repaired by applyingprotective coatings, using a structural model of implementation of decisions on technology selection of theapplication covering layer and cause-effect diagram to identify the factors that affect the quality of thecoating.

scholarly journals Optimal Design of Compact Spur Gear Reductions

1992 ◽  
Author(s):  
M. Savage ◽  
S. B. Lattime ◽  
J. A. Kimmel ◽  
H. H. Coe
Keyword(s):  
Optimal Design ◽  
Search Algorithm ◽  
Spur Gear ◽  
Optimal Designs ◽  
Continuous Variables ◽  
Gear Mesh ◽  
System Life ◽  
Optimal Configurations ◽  
System Volume ◽  
Selection Of

Abstract The optimal design of compact spur gear reductions includes the selection of bearing and shaft proportions in addition to the gear mesh parameters. Designs for single mesh spur gear reductions are based on optimization of system life, system volume, and system weight including gears, support shafts, and the four bearings. The overall optimization allows component properties to interact, yielding the best composite design. A modified feasible directions search algorithm directs the optimization through a continuous design space. Interpolated polynomials expand the discrete bearing properties and proportions into continuous variables for optimization. After finding the continuous optimum, the designer can analyze near optimal designs for comparison and selection. Design examples show the influence of the bearings on the optimal configurations.

scholarly journals Cleaning Methods for Ceramic Ultrafiltration Membranes Affected by Organic Fouling

Membranes ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 131
Author(s):  
Kamila Gruskevica ◽  
Linda Mezule
Keyword(s):  
Ceramic Membranes ◽  
Organic Liquids ◽  
Membrane Cleaning ◽  
Physical Methods ◽  
Operational Conditions ◽  
Organic Fouling ◽  
Cleaning Procedures ◽  
Cleaning Methods ◽  
Industrial Level ◽  
Selection Of

The use of ceramic membranes in the treatment and processing of various liquids, including those of organic origin, has increased tremendously at the industrial level. Apart from the selection of the most appropriate membrane materials and operational conditions, suitable membrane cleaning procedures are a must to minimize fouling and increase membrane lifespan. The review summarizes currently available and practiced non-reagent and cleaning-in-place methods for ceramic membranes that are used in the treatment of organic liquids, thus causing organic fouling. Backflushing, backwashing, and ultrasound represent the most often used physical methods for reversible fouling treatment. At the same time, the use of alkalis, e.g, sodium hydroxide, acids, or strong oxidants are recommended for cleaning of irreversible fouling treatment.

scholarly journals Optimal Design of Compact Spur Gear Reductions

1994 ◽  
Vol 116 (3) ◽  
pp. 690-696 ◽  
Author(s):  
M. Savage ◽  
S. B. Lattime ◽  
J. A. Kimmel ◽  
H. H. Coe
Keyword(s):  
Optimal Design ◽  
Search Algorithm ◽  
Spur Gear ◽  
Optimal Designs ◽  
Continuous Variables ◽  
Gear Mesh ◽  
System Life ◽  
Optimal Configurations ◽  
System Volume ◽  
Selection Of

The optimal design of compact spur gear reductions includes the selection of bearing and shaft proportions in addition to the gear mesh parameters. Designs for single mesh spur gear reductions are based on optimization of system life, system volume, and system weight including gears, support shafts, and the four bearings. The overall optimization allows component properties to interact, yielding the best composite design. A modified feasible directions search algorithm directs the optimization through a continuous design space. Interpolated polynomials expand the discrete bearing properties and proportions into continuous variables for optimization. After finding the continuous optimum, the designer can analyze near optimal designs for comparison and selection. Design examples show the influence of the bearings on the optimal configurations.

Material Selection of Gas-Well Wellhead Assembly and Application in High-Sulfur Gas-Well

2013 ◽  
Vol 703 ◽  
pp. 135-138
Author(s):  
Ling Feng Li
Keyword(s):  
Corrosion Resistance ◽  
Natural Gas ◽  
Production System ◽  
Material Selection ◽  
Gas Production ◽  
Gas Wells ◽  
Gas Well ◽  
System Life ◽  
Selection Of

For natural gas well, material selection of gas-well wellhead assembly is an important factor of gas production system life. In order to ensure the long-term development of gas wells, this paper mainly introduces the material selection of gas-well wellhead assembly, proposes the optimization idea and technique of gas-well wellhead assembly. By taking W well as an example, this paper optimizes the material selection of gas-well wellhead assembly for W well. For application, the optimal materials of gas-well wellhead assembly in W well have good performance of corrosion resistance.

Observation of Sub-Lattice Dislocation Pairs in an Improved High Temperature Protective Coating Alloy

1973 ◽  
Vol 31 ◽  
pp. 178-179
Author(s):  
Wen-Shian Tzeng ◽  
P. R. Strutt ◽  
R. S. Polvani
Keyword(s):  
High Temperature ◽  
Transition Metal ◽  
Protective Coating ◽  
Creep Strength ◽  
Nickel Aluminide ◽  
Lattice Mismatch ◽  
Titanium Addition ◽  
Heat Treated ◽  
Coating Alloy ◽  
Selection Of

A twenty-fivefold enhancement in the creep strength of nickel aluminide (NiAl) has been made by specific selection of a transition metal atom addition (Ti). The titanium addition in strongly favoring formation of the extremely stable Ni2A1Ti Heusler type phase gives rise to an alloy with a continuous Ni2AlTi phase containing a distribution of large NiAl ppts., see fig. 1. In the heat treated and undeformed alloy the lattice mismatch (−1%) is accommodated by two orthogonal sets of ao<100> dislocations. However, as creep ensues, these interfacial boundaries absorb glide dislocation to produce more complex networks of the type shown in fig. 1.

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