scholarly journals Improving the Anticorrosion Characteristics of Polymer Coatings in the Case of Their Modification with Compositions Based on Organosilanes

2021 ◽  
Author(s):  
M. A. Petrunin ◽  
N. A. Gladkikh ◽  
M. A. Maleeva ◽  
A. A. Rybkina ◽  
E. V. Terekhova ◽  
...  
Keyword(s):  
Corrosion Inhibitors ◽  
Steel Corrosion ◽  
Polymer Coatings ◽  
Mechanical Tests ◽  
Adhesive Properties ◽  
Model Soil ◽  
Modified Polymer ◽  
Paint Coatings ◽  
Local Dissolution ◽  
Electrolyte Ph

Abstract The effect of a series of organosilanes and their mixtures with corrosion inhibitors on the anticorrosion properties of polymer and paint coatings on steel, namely, on the adhesive characteristics of the coatings and corrosion behavior of the metal in the presence of coatings modified with organosilanes, corrosion inhibitors, and their mixtures, is studied. It is shown that mixtures of 1,2,3-benzotriazole (BTA) with vinyltrimethoxysilane (VTMS) or aminoethylaminopropyltrimethoxysilane—diaminosilane (DAS) inhibit the local dissolution and underfilm corrosion of carbon steel, and the potential of local depassivation shifts by 0.3–0.4 V. Here, compact polymer-like layers that are strongly bound to the metal surface are formed on the surface of steel. Corrosion and mechanical tests of the samples of pipe steels with different types of inhibiting compositions are conducted. The effect of the inhibitors on the crack growth under static loading in a model soil electrolyte (pH of 5.5) and on the crack resistance of steel under slow tension in an NS-4 model underfilm electrolyte (pH of 7.0) is evaluated. The tests are performed in media free from and containing hydrogen sulfide. It is shown that the best inhibiting properties are manifested by the mixtures of corrosion inhibitors with organosilanes. Comparative laboratory and bench tests for the adhesive strength, water resistance, and resistance to cathodic detachment of the adhesive junctions obtained upon applying the modified polymer and paint coatings onto the surface of steel are performed. It is found that introducing a mixture of organosilane and a corrosion inhibitor improves the adhesive properties of polymer and paint coatings.

scholarly journals Development of rust modifiers based on sulfite alkalis for corrosion protection of steel

2020 ◽  
Author(s):  
Е.Г. Раковская ◽  
Н.Г. Занько
Keyword(s):  
Corrosion Inhibitors ◽  
Coating Layer ◽  
Paper Industry ◽  
Gravimetric Method ◽  
Steel Corrosion ◽  
Pulp And Paper Industry ◽  
Inhibitory Effect ◽  
Polarization Curves ◽  
Protective Properties ◽  
Paint Coatings

Одним из способов подготовки поверхности под окраску является нанесение модификаторов ржавчины или специальных грунтовок – преобразователей ржавчины. Для улучшения защитных свойств в состав модифицирующих растворов вводят ингибиторы коррозии. Целью данного исследования являлось получение эффективных ингибиторов на основе отходов целлюлозно-бумажной промышленности, а также разработка систем покрытий с применением данных ингибиторов для защиты от коррозии лесных машин. Исследовались составы, приготовленные на основе сульфитного щелока в качестве ингибиторов коррозии стальных образцов без ржавчины, а также изучалась эффективность защитных свойств систем лакокрасочных покрытий, в состав которых входили грунты-модификаторы ржавчины, разработанные на основе сульфитных щелоков и нанесенные на ржавую поверхность с верхним покрывным слоем эмали ПФ-115. С помощью гравиметрического метода и метода снятия поляризационных кривых выявлено, что сульфитные щелока являются ингибиторами коррозии стали в кислой среде. Показано, сульфитные щелока могут использоваться в качестве ингибиторов коррозии стали к преобразователям ржавчины на основе ортофосфорной кислоты. С помощью визуальных и электрохимических методов выявлено, что наилучшими защитными свойствами обладает система преобразователь ржавчины П-2 + щелок + пиперидин. Поляризационные кривые, снятые в водных вытяжках грунтов-модификаторов ржавчины на основе сульфитных щелоков, подтверждают их ингибирующее действие. Выявлено, что наиболее эффективным ингибитором к преобразователю ржавчины П-2 является добавка щелок + пиперидин. One way to prepare the surface for painting is to apply rust modifiers or special primers – rust converters. To improve the protective properties, corrosion inhibitors are introduced into the composition of the modifying solutions. The purpose of this study was to obtain effective inhibitors based on waste from the pulp and paper industry, as well as the development of coating systems using these inhibitors to protect industrial equipment from corrosion. The compositions prepared on the basis of sulfite liquor as corrosion inhibitors of steel samples without rust were studied, and the effectiveness of the protective properties of paint coatings systems, which included rust modifiers primers developed on the basis of sulfite liquors and applied to a rusty surface with an upper coating layer, was studied. Enamel PF-115. Using the gravimetric method and the method of taking polarization curves, it was found that sulfite liquors are inhibitors of steel corrosion in an acidic environment. It has been shown that sulfite liquors can be used as inhibitors of steel corrosion to phosphoric acid-based rust converters. Using visual and electrochemical methods, it was revealed that the P-2 rust converter + liquor + piperidine system has the best protective properties. Polarization curves recorded in aqueous extracts of rust modifying soils based on sulfite liquors confirm their inhibitory effect. It was revealed that the most effective inhibitor to the P-2 rust converter is the addition of lye + piperidine.

Biomass Conversion Products as Steel Corrosion Inhibitors

2019 ◽  
Vol 92 (5) ◽  
pp. 620-624
Author(s):  
V. I. Mishurov ◽  
E. N. Shubina ◽  
V. A. Klushin ◽  
A. A. Chizhikova ◽  
V. P. Kashparova ◽  
...  
Keyword(s):  
Corrosion Inhibitors ◽  
Biomass Conversion ◽  
Steel Corrosion

scholarly journals From Waste to Valuable Resource: Lignin as a Sustainable Anti-Corrosion Coating

Coatings ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 454 ◽  
Author(s):  
Arman Dastpak ◽  
Kirsi Yliniemi ◽  
Mariana de Oliveira Monteiro ◽  
Sarah Höhn ◽  
Sannakaisa Virtanen ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Linear Sweep Voltammetry ◽  
Corrosion Current ◽  
Polymer Coatings ◽  
Open Circuit ◽  
Linear Sweep ◽  
Cyclic Potentiodynamic Polarization

In this study, a waste of biorefinery—lignin—is investigated as an anticorrosion coating on stainless steel. Corrosion behavior of two lignin types (hardwood beech and softwood spruce) was studied by electrochemical measurements (linear sweep voltammetry, open circuit potential, potentiostatic polarization, cyclic potentiodynamic polarization, and electrochemical impedance measurements) during exposure to simulated body fluid (SBF) or phosphate buffer (PBS). Results from linear sweep voltammetry of lignin-coated samples, in particular, demonstrated a reduction in corrosion current density between 1 and 3 orders of magnitude cf. blank stainless steel. Furthermore, results from cross cut adhesion tests on lignin-coated samples demonstrated that the best possible adhesion (grade 0) of ISO 2409 standard was achieved for the investigated novel coatings. Such findings suggest that lignin materials could transform the field of organic coatings towards more sustainable alternatives by replacing non-renewable polymer coatings.

Anticorrosion Protection of Welded Joints of Oil Pipelines

2018 ◽  
Vol 284 ◽  
pp. 1129-1133
Author(s):  
M.A. Ivanov ◽  
P.A. Danilkin ◽  
V.D. Kvashnin
Keyword(s):  
Welded Joints ◽  
High Speed ◽  
Operational Reliability ◽  
Polymer Coatings ◽  
Mechanical Tests ◽  
Technical Standards ◽  
Oil Companies ◽  
Oil Pipelines ◽  
Metal Properties ◽  
Protection Coating

Currently, a problem of destruction of field and interfiled pipelines is topical. One of effective ways to increase an operational reliability of pipes is to protect them with different coatings. To protect the inner surface of oil pipelines the polymer coatings are used which cover the full length except the end sections – zones of mounted welded joints. Oil companies are interested in development of a technology of metal coating applying to the end sections, which provides both reliability of protection system of inner surfaces of pipes, and workability and high speed of mounting of pipelines. This paper shows the analysis of protection methods of pipeline end sections. The tests of metallized coatings are held. We identified the significant shortcomings of metallized coatings. There is a held experiment on applying of corrosion resistant coating by surfacing. There are the calculated heating zones while the surfacing operation. We defined the minimum necessary length of section for applying the protection coating. A chemical analysis showed that the expected structure in a surfaced coating is an austenite with inclusions of ferrite and martensite. Metallographic research showed that the protection layer is fully melted with a base metal of a pipe and represents a homogeneous structure without pores and slag inclusions. Mechanical tests confirmed the compliance of pipe metal properties to the requirements of normative and technical standards.

NATURAL CORROSION INHIBITORS FOR STEEL REINFORCEMENT IN CONCRETE — A REVIEW

2015 ◽  
Vol 22 (03) ◽  
pp. 1550040 ◽  
Author(s):  
PANDIAN BOTHI RAJA ◽  
SEYEDMOJTABA GHOREISHIAMIRI ◽  
MOHAMMAD ISMAIL
Keyword(s):  
Reinforced Concrete ◽  
Corrosion Inhibitors ◽  
Construction Materials ◽  
Steel Corrosion ◽  
Vital Role ◽  
Prevention Measures ◽  
Main Culprit ◽  
Chloride Attack ◽  
Reinforced Steel ◽  
Metal Protection

Reinforced concrete is one of the widely used construction materials for bridges, buildings, platforms and tunnels. Though reinforced concrete is capable of withstanding a large range of severe environments including marine, industrial and alpine conditions, there are still a large number of failures in concrete structures for many reasons. Either carbonation or chloride attack is the main culprit which is due to depassivation of reinforced steel and subsequently leads to rapid steel corrosion. Among many corrosion prevention measures, application of corrosion inhibitors play a vital role in metal protection. Numerous range of corrosion inhibitors were reported for concrete protection that were also used commercially in industries. This review summarizes the application of natural products as corrosion inhibitors for concrete protection and also scrutinizes various factors influencing its applicability.

scholarly journals Inhibition of Pipeline Steel Corrosion in 0.5 M H2SO4 Using Cotyledon of Chrysophyllum Albidum

2020 ◽  
Vol 24 (4) ◽  
pp. 691-697
Author(s):  
E.P. Othaki ◽  
N.C. Ngobiri
Keyword(s):  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Adsorption Process ◽  
Pipeline Steel ◽  
Steel Corrosion ◽  
Langmuir Adsorption ◽  
Extract Concentration ◽  
Ir Studies ◽  
Ft Ir ◽  
As Adsorption

The corrosion inhibition characteristics of Chrysophyllum albidum cotyledon extract was studied as a green and sustainable corrosion inhibitors for pipeline steel in acidic environment attemperatures, 303,313 and 323K using gravimetric technique.The results obtained showed that the inhibition efficiency increased with increase in extract concentration but decrease with increase in temperature. The extract attained an inhibition efficiency of 94 % with 5 g/L at 303 K and 52.2 % with 1 g/L at 333K. Also increase in concentration of the extract lead to increase in activation energydepicting an exothermic process.Fourier transform infrared spectroscopy (FT-IR) studies showed the mode of inhibition as adsorption of phytochemicals from the extract on pipeline steel surface. Langmuir adsorption isotherm best fitted into the adsorption process which is spontaneous and physical. Keywords: Chrysophyllum albidum, Pipeline steel, Inhibition, Adsorption.

Reactivity and Fe complexation analysis of a series of quinoxaline derivatives used as steel corrosion inhibitors

2019 ◽  
Vol 31 (2) ◽  
pp. 631-645 ◽  
Author(s):  
Z. El Adnani ◽  
M. Mcharfi ◽  
M. Sfaira ◽  
M. Benzakour ◽  
A. T. Benjelloun ◽  
...  
Keyword(s):  
Corrosion Inhibitors ◽  
Steel Corrosion ◽  
Quinoxaline Derivatives

scholarly journals An Investigative Study on the Effect of Pre-Coating Polymer Solutions on the Fabrication of Low Cost Anti-Adhesive Release Paper

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1436
Author(s):  
Semen Vasilev ◽  
Andrey Vodyashkin ◽  
Daria Vasileva ◽  
Pavel Zelenovskiy ◽  
Dmitry Chezganov ◽  
...  
Keyword(s):  
Vinyl Acetate ◽  
Low Cost ◽  
Polymer Coatings ◽  
Adhesive Properties ◽  
Base Surface ◽  
Force Microscopy ◽  
Base Paper ◽  
Pulp Paper ◽  
Novel Approach ◽  
Spectroscopy Studies

This work describes a novel approach to produce high quality release paper at lower cost than traditional methods. The anti-adhesive properties of release paper require the use of expensive machine glazed kraft or “Glassine” paper as the paper base. A series of polymer coatings including polyvinyl alcohol, carboxymethyl cellulose, polyethylene vinyl acetate, and polystyrene were chemically synthesized and coated onto a low cost pulp paper base. Surface roughness (Sa) and smoothness coefficients (k) were determined by atomic force microscopy (AFM), and the interactions between the polymer coating and base paper were investigated by Raman spectroscopy. Studies show the use of polyethylene vinyl acetate (PEVA) as a pre-coating layer on low cost pulp paper exhibits similar anti-adhesive properties as higher cost paper bases. In low margin markets such as the production of release paper, decreases in cost are critical to industry survival.

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