scholarly journals Optimization of the Composition of Silicone Enamel by the Taguchi Method Using Surfactants Obtained from Oil Refining Waste

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3619
Author(s):  
Vitaliy Tyukanko ◽  
Alexandr Demyanenko ◽  
Antonina Dyuryagina ◽  
Kirill Ostrovnoy ◽  
Marianna Lezhneva
Keyword(s):  
Corrosion Rate ◽  
Taguchi Method ◽  
Optical Microscopy ◽  
Oil Refining ◽  
Properties Of Coatings ◽  
Two Component ◽  
Dispersant Additive ◽  
Aluminum Pigment ◽  
Specific Amount

The aim of this work is to optimize the composition of a two-component silicone enamel consisting of an aluminum pigment and a polyphenylsiloxane polymer to obtain the maximum dispersion of the pigment in the coating. The following products were used as surfactants: AS-1, PEPA, and Telaz. To assess the effect of surfactants on the dispersion of the pigment, computer-optical microscopy was used. The results of the studies showed that all the studied surfactants cause an improvement in the dispersion of the pigment. According to the degree of influence on the dispersion of the pigment, surfactants can be arranged in a row: PEPA > Telaz > AS-1. When the PEPA content in the enamel is 0.25 g/dm3, a decrease in the diameter of the pigment particles by 46% (from 26 to 14 microns) is recorded, with an increase in their specific amount by 2 times (from 258 to 550 pcs). Optimal enamel compositions allow a reduction in the corrosion rate by 11 times (from 0.6 to 0.053 mm/year) and improvement to the decorative properties of coatings (roughness, gloss, etc.). The effectiveness of the AS-1 product (obtained from oil refining waste) as a dispersant additive in silicone enamel has been proven.

Research and Usage of Solid Cleanser for Floor Heating Pipe

2011 ◽  
Vol 374-377 ◽  
pp. 1854-1857
Author(s):  
Yue Xian Liu ◽  
Nan Zhe Zhang
Keyword(s):  
Cast Iron ◽  
Corrosion Rate ◽  
Removal Rate ◽  
Iron Corrosion ◽  
Two Component ◽  
Floor Heating

A and B two-component solid chemical cleanser was prepared in order to clean the fouling in floor heating pipe effectively. In stated cleaning conditions, the fouling removal rate of this cleanser was greater than 97%, cast iron corrosion rate was much lower than 6 g/(m2•h) and brass corrosion rate was much lower than 2 g/(m2•h). The cleanser is solid, so its storage and transportation are convenient and its usage is easy and safe.

Investigation of Material Combinations Processed via Two-Component Metal Injection Moulding (2C-MIM)

2012 ◽  
Vol 727-728 ◽  
pp. 248-253 ◽  
Author(s):  
Gabriel Benedet Dutra ◽  
Marco Mulser ◽  
Roger Calixto ◽  
Frank Petzoldt
Keyword(s):  
Optical Microscopy ◽  
Injection Moulding ◽  
Interface Layer ◽  
Chemical Compositions ◽  
Interface Quality ◽  
Process Step ◽  
Metal Injection Moulding ◽  
Two Component ◽  
Single Process ◽  
Single Process Step

Joining materials with different properties into a single component is an attractive solution that allows producing parts with unique properties. In this respect, Two-Component Metal Injection Moulding (2C-MIM) presents numerous advantages, since the moulding and joining stage are performed in a single process step. In this work, the challenges, which occur when different materials are combined, are elucidated. Furthermore, the contact between metals with unequal chemical compositions leads to atomic interdiffusion that forms an interface layer. The interface quality is crucial to the production of intact parts after processing. Different material combinations are co-sintered and the interfaces are characterized by means of optical microscopy and EDX/SEM line scans. Further, thermodynamic and kinetic simulations are used to examine the interdiffusion in detail. The results show promising possibilities to combine different materials and helpful methods to examine the interface.

scholarly journals Luminescent determination of nitrite traces in water solutions using cellulose as sorbent

2015 ◽  
Vol 4 (1) ◽  
pp. 31-36 ◽  
Author(s):  
S. G. Nedilko ◽  
S. L. Revo ◽  
V. P. Chornii ◽  
V. P. Scherbatskyi ◽  
M. S. Nedielko
Keyword(s):  
Optical Microscopy ◽  
Microcrystalline Cellulose ◽  
Luminescence Spectroscopy ◽  
Water Solutions ◽  
Two Component ◽  
Luminescent Method

Abstract. Morphology and photoluminescence (PL) properties for microcrystalline cellulose (MCC), microcrystalline nitrite powders of common formulae MNO2 (M = Na, K) (MCN) and two-component materials composed of both MCC and MCN have been prepared and characterized by means of optical microscopy and luminescence spectroscopy. This study aimed to clarify a possibility of low-limit determination of the nitrite traces in water solutions by luminescent method.

Structure of zirconium alloy oxides formed in pure water studied with synchrotron radiation and optical microscopy: relation to corrosion rate

2004 ◽  
Vol 324 (1) ◽  
pp. 6-22 ◽  
Author(s):  
Aylin Yilmazbayhan ◽  
Arthur T Motta ◽  
Robert J Comstock ◽  
George P Sabol ◽  
Barry Lai ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Corrosion Rate ◽  
Optical Microscopy ◽  
Zirconium Alloy ◽  
Pure Water

scholarly journals Influence of hydrate formation and wall shear stress on the corrosion rate of industrial pipeline materials

2018 ◽  
Vol 62 (4) ◽  
pp. 121-128 ◽  
Author(s):  
L. Poberezhny ◽  
A. Hrytsanchuk ◽  
G. Hrytsuliak ◽  
L. Poberezhna ◽  
M. Kosmii
Keyword(s):  
Corrosion Rate ◽  
Gas Hydrates ◽  
Hydrate Formation ◽  
Joint Effect ◽  
Oil Refining ◽  
Two Phase ◽  
Industrial Pipeline ◽  
The Mathematical Model ◽  
Oil Gas ◽  
Pipeline Corrosion

Abstract In the modern systems of transportation of oil, gas and condensate, in the units of regasification of liquefied natural gas, two-phase flows play an increasingly important role in technological equipment used in the chemical and oil refining industry, power engineering and other industries. All available studies on the formation of gas hydrates were mainly focused on their ability to clog pipes along their entire length. While their ability to cause (initiate) corrosion remains virtually unexplored. Therefore, to increase the efficiency of industrial pipelines it is necessary to study the joint effect of hydration formation and stresses of friction on corrosion of the pipeline. The mathematical model of pipeline corrosion has been further developed by considering the influence of the gas hydrate. The influence of pressure, temperature on the speed of corrosion processes is estimated and it is shown that under the most unfavorable conditions the corrosion rate under the action of gas hydrates can increase several times.

scholarly journals Effect of Tricarboxylic Acids on the Formation of Hydrogels with Melem or Melamine: Morphological, Structural and Rheological Investigations

Gels ◽  
2022 ◽  
Vol 8 (1) ◽  
pp. 51
Author(s):  
Pradip Kumar Sukul ◽  
Puspendu Das ◽  
Gopal Lal Dhakar ◽  
Lalmohan Das ◽  
Sudip Malik
Keyword(s):  
Carboxylic Acid ◽  
Optical Microscopy ◽  
Aqueous Medium ◽  
Viscoelastic Properties ◽  
Tricarboxylic Acid ◽  
Size Selectivity ◽  
Component Systems ◽  
Two Component ◽  
Two Component Systems ◽  
Aggregation Behaviors

Herein, aggregation behaviors of melem or melamine in the presence of three symmetric carboxylic acids (1,3,5-tris(4-carboxyphenyl)benzene (TPCA), 1,3,5-benzene-tri-carboxylic acid (BTA) and 1,3,5-cyclohexane-tri-carboxylic acid (CHTA)) have been performed to check the influence of acid on the formation of aggregated structures which have been investigated by optical microscopy, FESEM, FTIR, XRD and viscoelastic properties have been explored with rheological studies. Interestingly, melem, that has limited solubility in aqueous medium, forms aggregation that leads to the formation of hydrogels with TPCA. More significantly, hydrogel is formed here by matching the size selectivity. Melem forms hydrogel with only large tricarboxylic acid, whereas melamine produces hydrogel with any kind of its counterpart from small to large tricarboxylic acid derivatives. Present investigations and results provide the strategy of design of organic self-assembled materials having two component systems.

Monitoring of technological environments at petrochemical plants as a means of ensuring their safe operation

2021 ◽  
pp. 162-168
Author(s):  
R. N. Bahtizin ◽  
◽  
S. N. Zubin ◽  
A. B. Laptev ◽  
D. A. Laptev ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Regression Model ◽  
Oil Refining ◽  
Circulation System ◽  
Corrosion Activity ◽  
Divalent Metal Ions ◽  
Recycled Water ◽  
Reservoir Water ◽  
Evaporation Coefficient ◽  
Equipment And Pipelines

The cooling recycled water of petrochemical enterprises is characterized by high corrosion activity, unstable composition and, due to the evaporation of water in cooling towers, a constant increase in the concentration of dissolved salts, suspended particles and organic pollutants. Some of the salts formed by divalent metal ions fall out in the form of deposits, and the water is satu-rated with chlorine, sulfate, phosphate, and carbonations and becomes corrosive. At the same time, the corrosion activity of reservoir water varies widely depending on the saturation of cer-tain ions and other ingredients. It is established that monitoring the composition of recycled water and determining the corrosion rate of equipment and pipelines, carried out within 1-2 months, allow us to build a regression model of the dependence of the corrosion rate on the technical parameters of water, with which we can accurately calculate the values of the corrosion rate on the evaporation coefficient. Monitoring of technological environments and optimization of their composition through mathematical modeling will significantly improve the safety of equipment and pipelines operation at oil refining enterprises. Keywords: corrosion inhibitor; scale inhibitor; biocide; water circulation system; evaporation coefficient; monitoring; cooling water; regression model.

Luminescence of the Alkali-Metals Nitrites Incorporated into Cellulose Matrix

2015 ◽  
Vol 230 ◽  
pp. 147-152 ◽  
Author(s):  
Sergiy Nedilko ◽  
Sergiy Revo ◽  
Maksym Nedielko ◽  
Tetjana Avramenko ◽  
Kateryna Ivanenko ◽  
...  
Keyword(s):  
Composite Materials ◽  
Surface Morphology ◽  
Optical Microscopy ◽  
Microcrystalline Cellulose ◽  
Alkali Metals ◽  
Luminescence Spectroscopy ◽  
Cellulose Matrix ◽  
Two Component

Surface morphology and photoluminescence (PL) properties of both microcrystalline cellulose (MCC), microcrystalline powders of the alkali metals nitrites MNO2 (M = Na. K, Cs) (MCN) and two-component composite materials based on the MCC and MCN have been studied and characterized by means of optical microscopy and luminescence spectroscopy.

Spectroscopic Observations of Visual Double Stars

1965 ◽  
Vol 5 ◽  
pp. 109-111
Author(s):  
Frederick R. West
Keyword(s):  
Radial Velocity ◽  
High Dispersion ◽  
Velocity Difference ◽  
Spectrograph Slit ◽  
Spectroscopic Observations ◽  
Double Stars ◽  
Visual Double Stars ◽  
Relative Orbit ◽  
Two Component ◽  
Star Images

There are certain visual double stars which, when close to a node of their relative orbit, should have enough radial velocity difference (10-20 km/s) that the spectra of the two component stars will appear resolved on high-dispersion spectrograms (5 Å/mm or less) obtainable by use of modern coudé and solar spectrographs on bright stars. Both star images are then recorded simultaneously on the spectrograph slit, so that two stellar components will appear on each spectrogram.

Sign in / Sign up

Export Citation Format

Share Document