Effects of Alloying Elements (Cr, Mn) on Corrosion Properties of Carbon Steel in Synthetic Seawater

Purpose: This work aimed at evaluating the properties of the ethyl silicate-based coating that can be applied on low carbon steel. Design/methodology/approach: Two mixture ratio types (2:1, and 3:2) of resin and hardener respectively were used to prepared two specimen models (A and B). Findings: It found that some mechanical properties (tensile, hardness, and impact strength) of ethyl silicate resin were evaluated according to standard criteria. Research limitations/implications: The effect of heat treatments at various temperatures (100, 150, and 200°C) and holding at different times (10, 20 & 30) min on hardness was investigated. Practical implications: Moreover, an open circuit potential corrosion test with a solution of 3.5% Sodium Chloride at room temperature and 60°C was used to determine the corrosion resistance of low carbon steel specimens coated with the two mixture types. Originality/value: The effects of mixture ratios (for resin and hardener) and heat treatment conditions on properties of ethyl silicate-based coating were studied. From obtained results, acceptable values of tensile, hardness, and toughness were recorded. Increasing heat treatment temperature and holding time leads to enhance hardness for both model types. An open circuit potential (OCP) tests show that there is an enhancement of protective properties of ethyl silicate coatings with mixture type B in comparison with type A was achieved. Generally, the results indicate that specimen model B has higher properties as compared with specimen model A.

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Preparation, characteristics and corrosion properties of α-Al2O3 coatings on 10B21 carbon steel by micro-arc oxidation

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2018.11.094 ◽

2019 ◽

Vol 358 ◽

pp. 637-645 ◽

Cited By ~ 5

Author(s):

Yankun Li ◽

Minfang Chen ◽

Wei Li ◽

Qi Wang ◽

Yansong Wang ◽

...

Keyword(s):

Carbon Steel ◽

Corrosion Properties ◽

Micro Arc Oxidation ◽

Α Al2o3

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Green Approach to Corrosion Inhibition of Carbon Steel by Fucus spiralis extract in 1 M HCl Medium

Biointerface Research in Applied Chemistry ◽

10.33263/briac125.70757091 ◽

2021 ◽

Vol 12 (5) ◽

pp. 7075-7091

Keyword(s):

Carbon Steel ◽

Corrosion Inhibitor ◽

Surface Characterization ◽

Electrochemical Impedance ◽

Electrochemical Techniques ◽

Adsorption Model ◽

Corrosion Properties ◽

Uv Visible ◽

Fucus Spiralis ◽

Hcl Medium

The extract of Fucus spiralis (FS) was tested as a corrosion inhibitor of carbon steel in a 1M HCl medium. The anti-corrosion properties were analyzed by gravimetric and electrochemical techniques such as potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). The surface characterization of carbon steel submerged in the optimal solution was carried out using UV-Visible, UV-Vis-NIR, and Optical microscopy analyses. Electrochemical and gravimetric results demonstrated that inhibitory efficiencies increase with increasing inhibitor concentration and the efficiency reaches 87% at a concentration of 0.5 g/L. According to Tafel extrapolated polarisation measurements, the FS also worked as a mixed-type corrosion inhibitor and changed the mechanism of anodic reactions. EIS analysis showed that a depressed capacitive loop dominates the Nyquist plot of impedance and enhances the polarization resistance (Rp) to 161.9 Ω cm2 with a reduction of the double layer capacity (Cdl) of carbon steel to 61.8 μF/cm2. This protection is assured by an adsorption mechanism based on the isothermal Langmuir adsorption model, which positively affects the thermodynamic parameters. UV-Visible, UV-Vis-NIR analyses exhibited that inhibitor decreases the iron oxides like hematite, Magnetite, and Goethite, Maghemite, Lepidocrocite, δ-FeOOH of the metal surface and delays the dissolution of the bare metal of iron to the ferrous ions, notably that optical morphology showed that FS extract decreases the aggressivity of HCl.

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Structural Properties Ni20Cr10Al2Y Coatings for Geothermal Conditions

Proceedings ◽

10.3390/proceedings2231434 ◽

2018 ◽

Vol 2 (23) ◽

pp. 1434 ◽

Cited By ~ 1

Author(s):

Aurelian Buzaianu ◽

Petra Motoiu ◽

Ioana Csaki ◽

Anghel Ioncea ◽

Vlad Motoiu

Keyword(s):

Carbon Steel ◽

Chemical Properties ◽

Mechanical Tests ◽

Steel Plates ◽

Geothermal System ◽

X Ray Diffraction ◽

Corrosion Properties ◽

Protective Layers ◽

Diffraction Patterns ◽

Oxygen Fuel

The chromium carbide hard phases powders are used for the high velocity oxygen fuel (HVOF) coating technique. This paper investigates samples coated with Ni20Cr10Al2Y on carbon steel plates. The coatings were designed to improve the erosion corrosion properties of carbon steel. The specific agglomerated nanosized Cr3C2 particles on the coated layer provide new physical, mechanical and chemical properties. The multilayer composite technique could be successfully used to protect turbine working in geothermal system. The samples were investigated using nanoindentation to determine the coated samples mechanical properties. The experimental procedure involved obtaining X-ray diffraction patterns of the specimens, micro mechanical tests and SEM investigation to provide detailed information about adhesion of protective layers and morphological modifications.

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Investigation of Microstructure, Nanohardness and Corrosion Resistance for Oxi-Nitrocarburized Low Carbon Steel

Metals ◽

10.3390/met9020190 ◽

2019 ◽

Vol 9 (2) ◽

pp. 190 ◽

Cited By ~ 2

Author(s):

Young-Wook Cho ◽

Young-Joon Kang ◽

Ju-Hwan Baek ◽

Jeong-Ho Woo ◽

Young-Rae Cho

Keyword(s):

Corrosion Resistance ◽

Carbon Steel ◽

Oxide Layer ◽

Potentiodynamic Polarization ◽

Low Carbon Steel ◽

Nanoindentation Test ◽

Low Carbon ◽

Electron Backscattered Diffraction ◽

Corrosion Properties ◽

Process Gas

A role of oxi-nitrocarburizing technique for low-carbon steel was intensively evaluated as a means of reducing the problem of corrosion in gas nitrocarburizing, which is a vital disadvantage of gas nitrocarburizing. Oxi-nitrocarburizing was carried out by a two-step process: Gas nitrocarburizing at 560 °C and oxidation. In order to characterize two different methods of oxi-nitrocarburizing, oxidation was performed under two different conditions: Air and steam as oxygen sources. To analyze the microstructural, physical, and chemical properties of the thin oxide layer and nitride layer, which are the surface hardened layers formed on low-carbon steel by oxi-nitrocarburizing, several methods, such as electron probe microanalysis (EPMA), electron backscattered diffraction (EBSD), scanning electron microscopy (SEM), nanoindentation tests, and potentiodynamic polarization tests were applied. The results indicated that the EPMA and EBSD methods are powerful techniques for the analysis of microstructure, such as phase analysis and metallic element distribution in the oxide layer of magnetite and compound layer of ε-phase and γ'-phase, for oxi-nitrocarburized low-carbon steel. Additionally, the nanohardness using the nanoindentation test and corrosion resistance using the potentiodynamic polarization test for the oxi-nitrocarburized specimens are useful methods to understand the mechanical and corrosion properties of the surface hardened layer.

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Mechanical and corrosion properties of low-carbon steel prepared by friction stir processing

International Journal of Minerals Metallurgy and Materials ◽

10.1007/s12613-019-1725-9 ◽

2019 ◽

Vol 26 (2) ◽

pp. 202-209 ◽

Cited By ~ 5

Author(s):

Li-ying Huang ◽

Kuai-she Wang ◽

Wen Wang ◽

Kai Zhao ◽

Jie Yuan ◽

...

Keyword(s):

Carbon Steel ◽

Friction Stir Processing ◽

Low Carbon Steel ◽

Low Carbon ◽

Corrosion Properties ◽

Friction Stir ◽

Mechanical And Corrosion Properties

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Performance Evaluation of SHY-99 Coating for Carbon Steel Water-Cooler

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.399-401.1886 ◽

2011 ◽

Vol 399-401 ◽

pp. 1886-1889

Author(s):

Bing Chen ◽

Xiao Li ◽

Yu Guang Fan

Keyword(s):

Carbon Steel ◽

Cooling System ◽

Test Methods ◽

National Standards ◽

Properties Of Coatings ◽

Corrosion Properties ◽

Immersion Testing ◽

Curve Method ◽

Water Cooler ◽

Water Cooling System

Special SHY-99 anti-corrosion coatings are used for newly developed heat exchange equipment, to resist corrosion and leakage problem of carbon steel water-cooler. The anti-corrosion properties of coatings were examined with routine test methods, Scanning Electron Microscope (SEM), electro kinetic potential polarization curve method and immersion testing method. The results show that physical properties of coatings are in accordance with national standards, the microstructures of coatings are uniform and tight, the coatings are combined tightly with base metal, and the coatings show excellent corrosion resistance in water of water cooling system.

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