scholarly journals Corrosion Resistance of a Sand Particle-Modified Enamel Coating Applied to Smooth Steel Bars

Materials ◽  
2014 ◽  
Vol 7 (9) ◽  
pp. 6632-6645 ◽  
Author(s):  
Fujian Tang ◽  
Genda Chen ◽  
Richard Brow ◽  
Michael Koenigstein
Keyword(s):  
Corrosion Resistance ◽  
Enamel Coating ◽  
Sand Particle ◽  
Steel Bars

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.

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.

scholarly journals Research on the Mechanical Strengths and the Following Corrosion Resistance of Inner Steel Bars of RPC with Rice Husk Ash and Waste Fly Ash

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1480
Author(s):  
Lili Cui ◽  
Hui Wang
Keyword(s):  
Corrosion Resistance ◽  
Fly Ash ◽  
Rice Husk ◽  
Electrical Resistance ◽  
Rice Husk Ash ◽  
Time History ◽  
Freeze Thaw ◽  
Steel Bars ◽  
Reactive Powder ◽  
Mechanical Strengths

In this paper, the slump flow and mechanical strengths (compressive and flexural strengths) of the reactive powder concrete (RPC) with rice husk ash (RHA) and waste fly ash (WFA) were investigated. The following corrosion resistance of steel bars-reinforced specimens was researched. The ultrasonic sound, the mass loss rate, the electrical resistance, and the electrical resistance time history curves were determined to reflect the corrosion resistance of steel bars. The influence of NaCl freeze–thaw cycles and dry–wet alternations was considered. Results showed that the addition of RHA and WFA demonstrated a negative effect on the fluidity of fresh RPC. The fluidity of fresh RPC with WFA was lower. Moreover, RHA and WFA could effectively improve the mechanical strengths of hardened RPC, and the enhancing effect of RHA was higher. The increasing dosage of RHA could improve the corrosion resistance of steel bars in RPC when the specimens were exposed to the environment of NaCl freeze–thaw cycles and dry–wet alternations. However, when WFA was added, the effect was the opposite. The steel bars in RPC corroded more seriously when the specimens were exposed to the environment of NaCl dry–wet alternations than the environment of NaCl freeze–thaw cycles.

scholarly journals Corrosion Resistance of Pipeline Steel with Damaged Enamel Coating and Cathodic Protection

Coatings ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 185 ◽  
Author(s):  
Liang Fan ◽  
Signo Reis ◽  
Genda Chen ◽  
Michael Koenigstein
Keyword(s):  
Corrosion Resistance ◽  
Cathodic Protection ◽  
Enamel Coating ◽  
Pipeline Steel

Corrosion resistance of steel bars in mortar mixtures mixed with organic matter, microbial or other

2019 ◽  
Vol 124 ◽  
pp. 105822 ◽  
Author(s):  
K. Kawaai ◽  
T. Nishida ◽  
A. Saito ◽  
I. Ujike ◽  
S. Fujioka
Keyword(s):  
Corrosion Resistance ◽  
Organic Matter ◽  
Steel Bars

Experimental Study of Bond Stress between Concrete and FRP Rebars

2014 ◽  
Vol 488-489 ◽  
pp. 774-777 ◽  
Author(s):  
Nan Hui Yu ◽  
Ji Jun Fan
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Corrosion Resistance ◽  
Unsaturated Polyester ◽  
Surface Form ◽  
Bonding Performance ◽  
Pull Out ◽  
Steel Bars ◽  
Polyester Composite ◽  
Corrosion Problem

Owing to the excellent tensile strength and corrosion-resistance of fiber reinforced unsaturated polyester composite, it is expected to solve the corrosion problem of building instead of steel bars in some special occasions. Bonding performance between concrete and FRP rebars was studied by pull-out test,the influences of the surface form, anchorage length and diameter of FRP rebar on bonding strength were discussed in detail.

scholarly journals Ion-triggered calcium hydroxide microcapsules for enhanced corrosion resistance of steel bars

RSC Advances ◽  
2018 ◽  
Vol 8 (69) ◽  
pp. 39536-39544 ◽  
Author(s):  
Zi Liang ◽  
Qian Wang ◽  
Biqin Dong ◽  
Bingyin Jiang ◽  
Feng Xing
Keyword(s):  
Corrosion Resistance ◽  
Calcium Hydroxide ◽  
Steel Bars

By exchanging PF6− of the CPILs with Cl−, Ca(OH)2 can penetrate out of the microcapsule through the formed hydrophilic channels.

Effects of Coating/Electroplating on Corrosion Resistance of Steel Bar in Reinforced Concrete

2012 ◽  
Vol 446-449 ◽  
pp. 3176-3179 ◽  
Author(s):  
Qun Zhou ◽  
Zhong He Shui ◽  
Yi De Xiao ◽  
Chang Sheng Xu
Keyword(s):  
Corrosion Resistance ◽  
Reinforced Concrete ◽  
Surface Treatment ◽  
Equivalent Circuit ◽  
Surface Coating ◽  
Corrosion Process ◽  
Steel Bar ◽  
Study Results ◽  
Steel Bars ◽  
Corrosion Of Steel

One of the main reasons for the damage of reinforced concrete is the expansion caused by corrosion of steel bar in concrete. In this paper, the equivalent circuit that inflects corrosion process of steel bars in reinforced concrete was analyzed, with the A.C.Impedance Spectrum method. And the effects of surface treatment of the bars on corrosion resistance of the reinforced concrete were investigated. Study results show that the surface coating (plating) on the built-in reinforcement can effectively prevent corrosion of steel bar, thereby enhancing the durability of concrete structures.

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