A new ternary composite steel rebar coating for enhanced corrosion resistance in chloride environment

2022 ◽  
Vol 320 ◽  
pp. 126307
Author(s):  
Manu Harilal ◽  
R.P. George ◽  
Shaju.K. Albert ◽  
John Philip
Keyword(s):  
Corrosion Resistance ◽  
Ternary Composite ◽  
Steel Rebar ◽  
Chloride Environment ◽  
Composite Steel

scholarly journals Influence of Rust Inhibitor on the Corrosion Resistance of Reinforcement in Cement Paste with Chloride

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 606
Author(s):  
Linchun Zhang ◽  
Ailian Zhang ◽  
Ke Li ◽  
Qian Wang ◽  
Junzhe Liu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Cement Paste ◽  
Photoelectron Spectroscopy ◽  
Electrical Resistance ◽  
Corrosion Properties ◽  
Passivation Film ◽  
Steel Bars ◽  
Assembly Unit ◽  
Chloride Environment ◽  
Rust Inhibitor

The electrical resistance and polarization effect of cement paste containing reinforcement were tested to research the anti-corrosion properties of steel bars in cement paste. Moreover, the microstructure and composition of passivation film and rust on the steel bars were studied. The water–cement ratio of the cement paste in this study was 0.3, with 0.5% NaCl, 1% NaNO2, and 1% Benzotriazole, and an assembly unit of 0.5% NaNO2 + 0.5% Benzotriazole by mass of cement was added to the cement to provide a chloride environment. X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM) were applied to research the composition of the passivation film and the microstructure of the cement paste, respectively. The results indicated that the samples with the assembly unit of 0.5% NaNO2 + 0.5% Benzotriazole showed the highest electrical resistance and polarization electrical resistance, while the specimens with 1.0% Benzotriazole showed the lowest electrical resistance and polarization electrical resistance. Moreover, the passivation film of steel bars weakened with increasing distance from the surface of the steel bars. Therefore, the corrosion of steel bars becomes more serious with increasing distance. Finally, the influence of the rust inhibitor on the corrosion resistance of steel bars in the specimens decreased in the following order: 0.5% NaNO2 + 0.5% Benzotriazole >1.0% NaNO2>1.0% Benzotriazole.

ENHANCEMENT OF EXFOLIATION CORROSION RESISTANCE OF ALUMINIUM ALLOY 5083 BY SHOT PEENING

2018 ◽  
Vol 25 (07) ◽  
pp. 1950020
Author(s):  
A. VINOTH JEBARAJ ◽  
L. AJAYKUMAR ◽  
C. R. DEEPAK ◽  
K. V. V. ADITYA
Keyword(s):  
Corrosion Resistance ◽  
Aluminium Alloy ◽  
Shot Peening ◽  
Roughness Parameters ◽  
X Ray Diffraction ◽  
X Ray ◽  
Exfoliation Corrosion ◽  
Marine Applications ◽  
Textural Changes ◽  
Chloride Environment

The present work is an effort to study the influence of shot peening on the exfoliation corrosion behavior of aluminium alloy (AA) 5083. Surface textural changes induced by shot peening was characterized using microstructural and X-ray diffraction analysis. The surface roughness parameters were measured to study the benefits of peening induced surface topography. Further, the hardness survey was carried out to assess the severe plastic deformation on the peened layers. As a result, excellent resistance against exfoliation corrosion was achieved in the chloride environment. Shot peening plays major role in enhancing the corrosion resistance of AA 5083. In the absence of exfoliation attack, the unpeened sample surfaces such as ground, milled, and as received conditions end up with a significant pitting attack. The findings of this work will be useful for the aluminium alloy fabrications involved in the marine applications.

Corrosion resistance and mechanism of steel rebar coated with three types of enamel

2012 ◽  
Vol 59 ◽  
pp. 157-168 ◽  
Author(s):  
Fujian Tang ◽  
Genda Chen ◽  
Richard K. Brow ◽  
Jeffery S. Volz ◽  
Michael L. Koenigstein
Keyword(s):  
Corrosion Resistance ◽  
Steel Rebar

A Study on Steel Fiber Influence to Rebar Corrosion in Concrete

2014 ◽  
Vol 578-579 ◽  
pp. 1145-1148
Author(s):  
Xiao E Zhu ◽  
Xu Jun Chen ◽  
Mu Xiang Dai
Keyword(s):  
Corrosion Potential ◽  
Steel Fiber ◽  
Steel Fibers ◽  
Sacrificial Anodes ◽  
Steel Rebar ◽  
Concrete Crack ◽  
Corrosion Cell ◽  
The Common ◽  
Rebar Corrosion ◽  
Chloride Environment

In dry-wet cycle chloride environment, the corrosion potential of the SFRC specimens is stable between-300mV to-400mV. And the common concrete specimens were about-500mV, adding steel fibers is higher corrosion potential and lower the corrosion possibility. Steel fiber has effective action on the controlling rebar corrosion and concrete crack. There were no cracks on all the surface of the SFRC specimens. Adding Steel fiber in concrete composed to be a corrosion cell as sacrificial anodes to protected steel rebar as cathode, in some degree to postpone rebar corrosion beginning time and increasing the structure services life.

scholarly journals Effect of Microstructure on Mechanical Properties and Corrosion Resistance of 2205 Duplex Stainless Steel

2015 ◽  
Vol 21 (4) ◽  
pp. 108-112 ◽  
Author(s):  
Jerzy Łabanowski ◽  
Aleksandra Świerczyńska ◽  
Santina Topolska
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Stress Corrosion ◽  
Structural Transformations ◽  
Shipbuilding Industry ◽  
Processing Technologies ◽  
Duplex Steel ◽  
Mechanical Properties And Corrosion ◽  
Chloride Environment ◽  
Low Strain Rate

Abstract This paper presents results of the research on impact of microstructure of austenitic-ferritic steel of duplex type on its mechanical properties and susceptibility to stress corrosion cracking. As showed, improper processing technologies more and more often used in shipbuilding industry for plates and other half-finished products made of duplex steel may cause significant lowering their properties, which frequently makes their replacing necessary. Results of the tests on stress corrosion under tension with low strain rate (SSRT) conducted in an inert and corrosion (boiling magnesium chloride) environment, are presented. It was proved that even minor structural transformations taking place in 500°C ageing temperature lower corrosion resistance of the steel. Structural transformations occurring in 700°C temperature to a smaller extent influence susceptibility to stress corrosion of the steel, however they cause drastic drop in its plasticity.

Corrosion Behavior of Enamel Coated Steel Rebar by EIS

2012 ◽  
Vol 450-451 ◽  
pp. 445-453 ◽  
Author(s):  
Fu Jian Tang ◽  
Gen Da Chen ◽  
Jeffery S. Volz ◽  
Richard K. Brow ◽  
Michael Koenigstein
Keyword(s):  
Corrosion Resistance ◽  
Pore Structure ◽  
Enamel Coating ◽  
Surface Condition ◽  
Corrosion Process ◽  
Coated Steel ◽  
Nacl Solution ◽  
Steel Rebar ◽  
Interconnected Pore ◽  
Interconnected Pore Structure

In this study, the corrosion process of enamel-coated deformed rebar completely immersed in 3.5 wt.% NaCl solution was evaluated over a period of 84 days by EIS testing. Three types of enamel coating were investigated: pure enamel, 50/50 enamel coating, and double enamel. Surface condition of the enamel coatings that were intentionally damaged prior to corrosion tests was visually examined at different immersion times. After 84 days of testing, the damaged coating areas were characterized by SEM, and the corrosion products on and adjacent to the damaged areas were collected and analyzed by XRD. Corrosion initiated at the damaged locations with no undercutting of the coating observed. The 50/50 enamel coating had the least corrosion resistance, due to its interconnected pore structure, and prior damage drastically reduced the corrosion resistance of pure and double enamel coated rebar.

The Influence of Electrospark and Laser Treatment upon Corrosive Resistance of Carbon Steel

2014 ◽  
Vol 874 ◽  
pp. 107-112 ◽  
Author(s):  
Mieczysław Scendo ◽  
Norbert Radek ◽  
Joanna Trela
Keyword(s):  
Corrosion Resistance ◽  
Electron Microscope ◽  
Carbon Steel ◽  
Scanning Electron Microscope ◽  
Tungsten Carbide ◽  
Laser Treatment ◽  
Polarization Technique ◽  
Chloride Environment ◽  
Corrosive Resistance ◽  
Scanning Electron

The influence on corrosion resistance of C45 carbon steel in chloride environment covered by coats of tungsten carbide and copper were examined. The coats were put on the surface of steel by electrospark method. The potentiodynamic polarization technique for corrosive investigations was applied. The topography of surface by scanning electron microscope (SEM) was observed. The most corrosion resistance was exhibited for steel covered by mixture of the 25% WC and 75% Cu nanopowders. The top layer of coating is not homogeneous and consists of copper, WC2, tungsten carbide and iron. The laser treatment modifies of the electrospark layer and influences on the correct it usable properties.

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