scholarly journals Corrosion Resistance Of High-Performance Composite Beams

2021 ◽  
Author(s):  
Mohammad Ali Hossain
Keyword(s):  
Corrosion Resistance ◽  
High Performance ◽  
Failure Modes ◽  
Composite Beams ◽  
Crack Pattern ◽  
Cell Potential ◽  
Accelerated Corrosion ◽  
Accelerated Corrosion Tests ◽  
High Performance Composite ◽  
Superior Corrosion Resistance

The research concentrated on the corrosion resistance of reinforced self-consolidating concrete (SCC), lightweight SCC (LWSCC), fiber reinforced LWSCC (FRLWSCC), Engineered cementitious composite (ECC) and composite (ECC-SCC/LWSCC) beams. The performance of corroded beams were analyzed based on current measurements, half-cell potential readings, crack pattern/width, rebar mass loss and diameter reduction from accelerated corrosion tests. Corroded and their companion uncorroded beams were tested to failure under four-point loading to evaluate load-deflection response, crack pattern, 1st flexure/diagonal cracking load, failure load and failure modes. Composite beams with higher ECC layer thickness exhibited superior corrosion resistance than their lower thickness counterparts and full depth SCC or LWSCC counterparts as well as performance of beams with ECC wrap was better than those with layer. Overall, ECC beams can be a superior alternative of their conventional counterparts and ECC can be used as layer or wrapping in conventional/LWSCC beams to enhance corrosion resistance and structural performance

scholarly journals Corrosion Resistance Of High-Performance Composite Beams

2021 ◽  
Author(s):  
Mohammad Ali Hossain
Keyword(s):  
Corrosion Resistance ◽  
High Performance ◽  
Failure Modes ◽  
Composite Beams ◽  
Crack Pattern ◽  
Cell Potential ◽  
Accelerated Corrosion ◽  
Accelerated Corrosion Tests ◽  
High Performance Composite ◽  
Superior Corrosion Resistance

The research concentrated on the corrosion resistance of reinforced self-consolidating concrete (SCC), lightweight SCC (LWSCC), fiber reinforced LWSCC (FRLWSCC), Engineered cementitious composite (ECC) and composite (ECC-SCC/LWSCC) beams. The performance of corroded beams were analyzed based on current measurements, half-cell potential readings, crack pattern/width, rebar mass loss and diameter reduction from accelerated corrosion tests. Corroded and their companion uncorroded beams were tested to failure under four-point loading to evaluate load-deflection response, crack pattern, 1st flexure/diagonal cracking load, failure load and failure modes. Composite beams with higher ECC layer thickness exhibited superior corrosion resistance than their lower thickness counterparts and full depth SCC or LWSCC counterparts as well as performance of beams with ECC wrap was better than those with layer. Overall, ECC beams can be a superior alternative of their conventional counterparts and ECC can be used as layer or wrapping in conventional/LWSCC beams to enhance corrosion resistance and structural performance

scholarly journals Accelerated Short-Term Techniques to Evaluate Corrosion in TiC Reinforced AA6063 Composites

2017 ◽  
Vol 13 (10) ◽  
pp. 5905-5913
Author(s):  
S. Saravanan ◽  
P.Senthil Kumar ◽  
T. Palanisamy ◽  
M. Ravichandran ◽  
V. Anandakrishnan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Room Temperature ◽  
Stir Casting ◽  
Short Term ◽  
Accelerated Corrosion ◽  
Weight Percentage ◽  
The Poor ◽  
Accelerated Corrosion Tests

AA6063-TiC composites have several weight percentages up to 9 wt. % were fabricated by using stir casting route method. The effects of the weight percentage of TiC particles on the microstructures and corrosion behavior of AA6063-TiC composites were studied. The results revealed that the AA6063-TiC composites exhibited higher density than the AA6063 matrix. The accelerated corrosion tests of AA6063-TiC composites in 3.5 wt. % NaCl aqueous solution at room temperature, the AA6063-TiC composites have better corrosion resistance than the AA6063 matrix. Increasing the weight percentage of the TiC particles to reduces the corrosion rate of the AA6063-TiC composites. In this process corrosion rate of 0.4402 mm/year for AA6063 matrix, 0.3891 mm/year for 3 wt. % , 0.3568 mm/year for 6 wt. % and 0.3062 mm/year for 9 wt. % of TiC particles respectively. The poor corrosion resistance of the composites can be attributed to the galvanic effects between the AA6063 matrix and TiC reinforcement.

The Effect of Bainitic Transformation Microstructure under Applied Stress on Corrosion Resistance of HQ785 Steel

2011 ◽  
Vol 239-242 ◽  
pp. 1591-1596
Author(s):  
Yu Hong Wang ◽  
Wei Juan Li ◽  
Lan Jin
Keyword(s):  
Corrosion Resistance ◽  
Phase Transformation ◽  
Tensile Stress ◽  
Isothermal Transformation ◽  
Granular Bainite ◽  
Low Carbon ◽  
Accelerated Corrosion ◽  
Accelerated Corrosion Tests ◽  
Weight Loss Method ◽  
Loss Method

In this thesis, based on the low-carbon bainitic steel HQ785, isothermal transformation tests are carried out on the Gleeble-3500 thermo-mechanical simulator under uniaxial external tensile stress state. The fully immersed accelerated corrosion tests for the specimens, with different microstructure after phase transformation are carried out. The corrosion behavior of experimental steel is evaluated, combing with OM, SEM, weight loss method and electrochemical method. The results show that the shape of phase transformation microstructrue varies from granular to lath with the increase of external tensile stress. The corrosion resistance of which is better than that of granular bainite without stress. The sample with rusty layer after full immersion seawater corrosion shows good protectiveness.

An Appropriate Specimen Configuration for Evaluating the Perforation Corrosion Resistance of Automotive Coated Steel Sheets in Accelerated Corrosion Tests

CORROSION ◽  
10.5006/1298 ◽  
2015 ◽  
Vol 71 (1) ◽  
pp. 92-100
Author(s):  
Daisuke Mizuno ◽  
Katsuya Hoshino ◽  
Shinji Otsuka ◽  
Sakae Fujita ◽  
Nobuyoshi Hara
Keyword(s):  
Corrosion Resistance ◽  
Coated Steel ◽  
Accelerated Corrosion ◽  
Corrosion Tests ◽  
Steel Sheets ◽  
Accelerated Corrosion Tests

scholarly journals Investigation of Mechanical and Anti-Corrosion Properties of Flame Sprayed Coatings

2018 ◽  
Vol 18 (4) ◽  
pp. 42-53
Author(s):  
M. Musztyfaga-Staszuk ◽  
A. Czupryński ◽  
M. Kciuk
Keyword(s):  
Corrosion Resistance ◽  
Industrial Applications ◽  
Operating Conditions ◽  
Coating Properties ◽  
Corrosion Properties ◽  
Accelerated Corrosion ◽  
Corrosion Resistant ◽  
Accelerated Corrosion Tests ◽  
Sprayed Coatings ◽  
Corrosion System

Abstract This article presents the results of an examination of the properties of thermal flame sprayed coatings produced by material in the form of four powders (two polymers: PA11 and PA12 CastoPlast, and two high purity: tin and aluminum) on the substrate of the unalloyed structural steel of S235JR grade. Investigations of coating properties are based on metallography tests (SEM and CLSM), measurement of microhardness (acc. to PN-EN ISO 6507-1:2007), anticorrosive (acc. to PN-EN ISO 9227:2017-06) and bend testing. Results demonstrate properties of flame sprayed coatings that are especially promising in the industrial applications where corrosion-resistant coating properties are required. Consequently, performed experiments show that the highest corrosion resistance is demonstrated by steel samples with a polyamide anti-corrosion system. Accelerated corrosion tests showed the lowest corrosion resistance of the tin coating system, however, they do not fully correspond to the corrosion processes in operating conditions.

scholarly journals Potential of Tomato Pomace Extract as a Multifunction Inhibitor Corrosion of Mild Steel

2021 ◽  
Author(s):  
Viktoria Vorobyova
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitor ◽  
High Performance ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Components ◽  
Accelerated Corrosion ◽  
Tomato Pomace ◽  
Chromatography Analysis ◽  
Accelerated Corrosion Tests ◽  
Weight Loss Method

Abstract The aim of this paper is to investigate tomato pomace extract (TPE) as multifunctional “green” vapor phase corrosion inhibitor for prevention of the atmospheric corrosion of mild steel and as corrosion inhibitor in neutral media of 0.5 M NaCl solution. The chemical profile of the TPE was analysed using gas chromatography mass spectrometry (GC-MS) and high performance liquid chromatography analysis (HPLC-DAD-MS). The major volatile constituents identified in tomato pomace extract were alcohols (12.5 %), fatty acids (23.78 %), aldehydes (41.6 %), ketones (8.65 %), and terpenoids (9.11 %). The predominant semi-volatile and high molecular weight chemical components in tomato pomace extract were phenolic acids and flavanols. The corrosion protection properties of the TPE as multifunctional corrosion inhibitor were studied using of accelerated corrosion tests (weight loss method) and electrochemical methods (polarization curves and linear polarization technique (LPR)). The mechanism of steel inhibition by TPE formulations was studied by scanning electron microscopy (SEM) and atomic force microscopy (AFM) observations. The analysis confirmed that the growth of inhibitory properties is prolonged and corrosion rate is reduced after 40–48 h of exposure. Quantum-chemical calculations were used to predict the adsorption/inhibition properties of some of the main compounds of the extract.

scholarly journals High Performance Anti-Corrosion Coatings of Poly (Vinyl Butyral) Composites with Poly N-(vinyl)pyrrole and Carbon Black Nanoparticles

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2307 ◽  
Author(s):  
Lu Hao ◽  
Guowei Lv ◽  
Yaqian Zhou ◽  
Kaiming Zhu ◽  
Mochen Dong ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Carbon Black ◽  
High Performance ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Corrosion Property ◽  
Corrosion Properties ◽  
The Matrix ◽  
Superior Corrosion Resistance ◽  
Vinyl Butyral

Zinc is widely used in battery negative electrodes and steel coatings for automotive industries. The anti-corrosion property of zinc is the most important factor determining the performance and lifetime of the products. In this paper, both size-controlled poly N-(vinyl)pyrrole (PNVPY) nanoparticles and carbon black (CB) nanoparticles were compounded with poly (vinyl butyral) (PVB) binder developing a series of composite coatings covered on the zinc substrates using a spin-coating technique. The morphologies of the surface and cross section of the PNVPY/CB/PVB coatings indicate that the PNVPY and CB nanoparticles are uniformly distributed in the matrix. The corrosion resistance of the composite coatings was tested by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization in a 3.5% NaCl solution. It is found that the coating with 1.9 wt.% PNVPY and 2.3 wt.% CB nanoparticles shows a remarkably high resistance value (Rc) and corrosion protection efficiency (99.99%). Meanwhile, the immersion results also reveal its superior corrosion resistance. It is considered that the nanoscale dispersion of PNVPY and carbon in PVB matrix and the strong interface action between the nanoparticles and PVB result in the uniform microstructure of the composites which endues the superior corrosion properties of the coatings.

scholarly journals OPPORTUNITIES TO INCREASE THE CORROSION RESISTANCE OF BUILDING STRUCTURES OPERATING IN AGGRESSIVE PRODUCTION ENVIRONMENTS

2020 ◽  
Vol 8 (3) ◽  
pp. 29-35
Author(s):  
Alekseej Kolobanov ◽  
Linar Sabitov ◽  
Nataliya Tarasova
Keyword(s):  
Corrosion Resistance ◽  
Crystallite Size ◽  
Zinc Coating ◽  
High Humidity ◽  
Building Structures ◽  
Corrosion Wear ◽  
Accelerated Corrosion ◽  
Average Percentage ◽  
Accelerated Corrosion Tests ◽  
Production Environments

This paper presents the results of a study of the corrosion resistance of building structures OF NLMK's CCPP and CDP. It was found that the average percentage of damage is 8.69%, and the areas with high humidity and gas emissions have the greatest corrosion wear of elements. Using a mathematical model of corrosion for zinc and steel, their expected corrosion losses are calculated. It is shown that the greatest mass loss is observed in areas with a concentration of hydrogen chloride above the background value. The results of accelerated corrosion tests of a zinc coating with a crystallite size from 0.6 to 3.5 microns showed that reducing the crystallite size to 0.6 microns reduces the corrosion rate by 2 times, which should increase the service life of the structure by 1.5-2 times compared to traditional materials.

scholarly journals Accelerated Corrosion Tests in Quality Labels for Powder Coatings on Galvanized Steel—Comparison of Requirements and Experimental Evaluation

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6547
Author(s):  
Izabela Kunce ◽  
Agnieszka Królikowska ◽  
Leszek Komorowski
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Protection ◽  
Experimental Evaluation ◽  
Salt Spray ◽  
Galvanized Steel ◽  
Neutral Salt ◽  
Powder Coatings ◽  
Accelerated Corrosion ◽  
Corrosion Tests ◽  
Accelerated Corrosion Tests

Powder coatings are widely applied for corrosion protection of steel, aluminum, and hot dip galvanized steel in a variety of corrosive environments. Powder coatings are subjected to a number of strict laboratory tests to determine their mechanical properties, corrosion resistance, and color stability. Among European quality certificates for powder coatings applied to galvanized steel, the most commonly recognized are GSB-ST and Qualisteelcoat certificates, which also refer to the EN 13438 standard. Certificates of quality for powder coatings are constantly updated according to the latest research results and experience of specialists operating in the field of corrosion protection. This paper presents an experimental evaluation of how the required length of selected accelerated corrosion tests can affect the final assessment of powder coatings. On the example of two powder painting systems: polyester as well as based on epoxy and polyester resins, the paper presents the influence of the time of accelerated corrosion tests: ISO 6270, ISO 9227 (Neutral Salt Spray and Acetic Acid Salt Spray), and ISO 3231 on the protective properties of the coatings. The results of damage assessment according to ISO 4628 have been correlated with the requirements of particular quality specifications. Additionally, based on FTIR (Fourier Transform Infrared Spectroscopy) and EIS (Electrochemical Impedance Spectroscopy) analyses, the influence of the applied corrosion tests on the degradation degree of the coatings studied has been presented. The paper aims to present a tests for those powder coating systems applied to facilities for which the main requirement is corrosion resistance rather than aesthetics.

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