Influence of chloride corrosion on tension capacity of rebars

2021 ◽  
Vol 28 (10) ◽  
pp. 3018-3028
Author(s):  
Mohammad Ghanooni-Bagha
Keyword(s):  
Chloride Corrosion ◽  
Tension Capacity

The Effect of Weld Length on the Tension Capacity of Hollow Structural Section (HSS)

2020 ◽  
pp. 42-58
Keyword(s):  
Cross Section ◽  
Uniform Stress ◽  
Entire Cross Section ◽  
Design Strength ◽  
Minimum Requirement ◽  
Tension Member ◽  
Hollow Structural Section ◽  
Hollow Structural Sections ◽  
Tension Capacity ◽  
Steel Standard

The non-uniform stress distribution occurs in a tension member adjacent to a connection, in which all elements of the cross-section are not directly connected. This effect reduces the member’s design strength because the entire cross-section is not fully effective in the critical section’s location. That's why an experimental study has been done to investigate the effect of the weld length on the tension capacity, two specimens (hollow structural sections) have been tested by using Instron 8800 machine with two weld lengths, 46 mm and 56 mm. The 46 mm size is the minimum requirement of the sufficient size of the tension connection depending on United States Steel Standard. The Result proved that there has been too much effect on the connection carrying tension capacity. The result of the 46 mm weld length is about 155 KN and about 180 KN for the 56 mm weld length. While the ABAQUS simulation results were about 168 KN for the 46 mm weld length and about 172 KN for the 56 mm weld length.

scholarly journals Numerical Simulation of Non-Uniformly Distributed Corrosion in Reinforced Concrete Cross-Section

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3975
Author(s):  
Magdalena German ◽  
Jerzy Pamin
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Chloride Transport ◽  
Chloride Concentration ◽  
Corrosion Current ◽  
Chloride Diffusion ◽  
Chloride Diffusion Coefficient ◽  
Initiation Phase ◽  
Chloride Corrosion ◽  
Cover Thickness

Reinforced concrete structures can be strongly damaged by chloride corrosion of reinforcement. Rust accumulated around rebars involves a volumetric expansion, causing cracking of the surrounding concrete. To simulate the corrosion progress, the initiation phase of the corrosion process is first examined, taking into account the phenomena of oxygen and chloride transport as well as the corrosion current flow. This makes it possible to estimate the mass of produced rust, whereby a corrosion level is defined. A combination of three numerical methods is used to solve the coupled problem. The example object of the research is a beam cross-section with four reinforcement bars. The proposed methodology allows one to predict evolving chloride concentration and time to reinforcement depassivation, depending on the reinforcement position and on the location of a point on the bar surface. Moreover, the dependence of the corrosion initiation time on the chloride diffusion coefficient, chloride threshold, and reinforcement cover thickness is examined.

Screening Tests of Inhibitors to Prevent Chloride Stress Corrosion★

CORROSION ◽  
1959 ◽  
Vol 15 (9) ◽  
pp. 18-22 ◽  
Author(s):  
J. H. PHILLIPS ◽  
W. J. SINGLEY
Keyword(s):  
Stress Corrosion ◽  
Sodium Sulfite ◽  
Screening Tests ◽  
Test Results ◽  
Corrosion Attack ◽  
Concentration Effects ◽  
Boiler Water ◽  
Chloride Corrosion ◽  
Alkaline Phosphate ◽  
Potential Inhibitors

Abstract Series of screening tests were run in tilting autoclaves to evaluate performance of selected, potential inhibitors in preventing chloride stress corrosion attack of Type 347 austenitic stainless steel in alkaline-phosphate boiler water containing 50 or 500 ppm chloride. From the test results, several inhibitors were tested further to evaluate concentration effects. Nitrate appeared to be a satisfactory inhibitor for oiler applications. Sodium sulfite also effectively prevented chloride corrosion cracking oy scavenging oxygen. 5.8.4

In vitro chloride corrosion behaviour of Dispersalloy

1975 ◽  
Vol 2 (2) ◽  
pp. 139-144 ◽  
Author(s):  
N. K. SARKAR ◽  
E. H. GREENER
Keyword(s):  
Corrosion Behaviour ◽  
Chloride Corrosion
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