Quantitative evaluation of the volume of local corrosion damage

1993 ◽  
Vol 28 (1) ◽  
pp. 109-110
Author(s):  
V. N. Polyakov ◽  
V. N. Geminov ◽  
A. P. Makarov
Keyword(s):  
Quantitative Evaluation ◽  
Corrosion Damage ◽  
Local Corrosion

Local corrosion damage of aluminum alloys

1984 ◽  
Vol 19 (5) ◽  
pp. 422-426 ◽  
Author(s):  
O. D. Smiyan ◽  
M. V. Koval' ◽  
R. K. Melekhov ◽  
N. L. Korobanova ◽  
A. M. Krutsan ◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Corrosion Damage ◽  
Local Corrosion

scholarly journals Residual Compressive Strength of Short Tubular Steel Columns with Artificially Fabricated Local Corrosion Damage

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 813
Author(s):  
Kyra Kamille Toledo ◽  
Hyoung-Seok Kim ◽  
Young-Soo Jeong ◽  
In-Tae Kim
Keyword(s):  
Compressive Strength ◽  
Numerical Study ◽  
Corrosion Damage ◽  
Reduction Factor ◽  
Local Corrosion ◽  
Percentage Error ◽  
Steel Columns ◽  
Residual Compressive Strength ◽  
Short Columns ◽  
Half Wavelength

Corrosion is considered as one of the main factors in the structural performance deterioration of steel members. In this study, experimental and numerical methods were used to assess the reduction in compressive strength of short tubular steel columns with artificially fabricated local corrosion damage. The corrosion damage was varied with different depths, heights, circumferences, and locations along the column. A parametric numerical study was performed to establish a correlation between the residual compressive strength and the severity of corrosion damage. The results showed that as the corrosion depth, height and circumference increased, the compressive strength decreased linearly. As for the corrosion height, the residual compressive strength became constant after decreasing linearly when the corrosion height was greater than the half-wavelength of buckling of the short columns. An equation is presented to evaluate the residual compressive strength of short columns with local corrosion wherein the volume of the corrosion damage was used as a reduction factor in calculating the compressive strength. The percentage error using the presented equation was found to be within 11.4%.

scholarly journals Evaluation of Residual Compressive Strength and Behavior of Corrosion-Damaged Carbon Steel Tubular Members

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1254
Author(s):  
Jin-Hee Ahn ◽  
Seok-Hyeon Jeon ◽  
Young-Soo Jeong ◽  
Kwang-Il Cho ◽  
Jungwon Huh
Keyword(s):  
Compressive Strength ◽  
Failure Modes ◽  
Compressive Loading ◽  
Steel Structures ◽  
Corrosion Damage ◽  
Local Corrosion ◽  
Structural Behavior ◽  
Loading Test ◽  
Element Analysis ◽  
Cross Sectional

Local corrosion damage of steel structures can occur due to damage to the paint-coated surface of structures. Such damage can affect the structural behavior and performance of steel structures. Compressive loading tests were, thus, carried out in this study to examine the effect of local corrosion damage on the structural behavior and strength of tubular members. Artificial cross-sectional damage on the surface of the tubular members was introduced to reflect the actual corroded damage under exposure to a corrosion environment. The compressive failure modes and compressive strengths of the tubular members were compared according to the localized cross-sectional damage. The compressive loading test results showed that the compressive strengths were affected by the damaged width within a certain range. In addition, finite element analysis (FEA) was conducted with various parameters to determine the effects of the damage on the failure mode and compressive strength of the stub column. From the FEA results, the compressive strength was decreased proportionally with the equivalent cross-sectional area ratio and damaged volume ratio.

scholarly journals Residual Compressive Strength of Short Tubular Steel Columns with Local Corrosion Damage

2020 ◽  
Author(s):  
Kyra Kamille Toledo ◽  
Hyoung-Seok Kim ◽  
Young-Soo Jeong ◽  
In-Tae Kim
Keyword(s):  
Compressive Strength ◽  
Numerical Study ◽  
Corrosion Damage ◽  
Reduction Factor ◽  
Local Corrosion ◽  
Percentage Error ◽  
Steel Columns ◽  
Residual Compressive Strength ◽  
Short Columns ◽  
Half Wavelength

Corrosion is considered as one of the main factors in the structural performance deterioration of steel members. In this study, experimental and numerical methods were used to assess the reduction in compressive strength of short tubular steel columns with local corrosion damage. The corrosion damage was varied with different depths (0, 1.5, 2, 3, 4, 4.5, and 6 mm), height (0, 20, 40, 60, 80, 100, 120, 140, 160, and 180 mm), circumference (0, 90, 180, 270, and 360°), and location along the column. A parametric numerical study was performed to establish a correlation between the residual compressive strength and the severity of corrosion damage. The results showed that as the corrosion depth, height and circumference increased, the compressive strength decreased linearly. As for the corrosion height, the residual compressive strength became constant after decreasing linearly when the corrosion height was greater than the half-wavelength of buckling of the short columns. An equation is presented to evaluate the residual compressive strength of short columns with local corrosion wherein the volume of the corrosion damage was used as a reduction factor in calculating the compressive strength. The percentage error using the presented equation was found to be within 11.4%.

Integrity Assessment of Spherical Pressure Components With Local Corrosion and Hot Spots

2006 ◽  
Author(s):  
Pattaramon Tantichattanont ◽  
Seshu Adluri ◽  
Rangaswamy Seshadri
Keyword(s):  
Lower Bound ◽  
Hot Spots ◽  
Structural Integrity ◽  
Hot Spot ◽  
Corrosion Damage ◽  
Pressure Vessels ◽  
Operating Conditions ◽  
Local Corrosion ◽  
Integrity Assessment ◽  
Spherical Pressure

Corrosion damage and hot spots are typical of damages that can occur in ageing pressure vessels and pipelines used in industrial processes. Internal and external corrosion could be the result of corrosive products stored inside or harsh environmental conditions on the outside. Hot spots are caused by damage due to loss of refractory lining on the inside wall of pressure components or due to maldistribution of flow containing catalyst and reactive fluids. The structural integrity of such ageing components needs to be evaluated periodically to establish the continued suitability of the vessels under operating conditions. The present paper develops a method for Level 2 (as categorized by API 579) structural integrity evaluations of spherical pressure vessels containing local corrosion damage or hot spot. The decay lengths for spherical shells subject to local damages have been studied based on stretching and bending effects using elastic shell theories so as to identify the reference volume participating in plastic action. A limit for “local” corroded spot or hot spot is defined by the size of damage that an onset of pure membrane action occurs inside the damaged area. The size of damage indicating the crossover from dominance of stretching effects on the damage behavior to that of bending effects is also presented. The lower bound recommended “remaining strength factors” for spherical pressure vessels containing corrosion or hot spot are formulated by application of Mura’s integral mean of yield criterion and the improved lower bound mα-multiplier. Three alternative recommendations are proposed. The effectiveness of the proposed methods is evaluated and demonstrated through illustrative examples and comparison with inelastic finite element analyses.

EFFECT OF SURFACE PREPARATION GRADE ON REPAIR BY MEANS OF COVER PLATES AND ADHESIVE

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
Ryuichi Yokota ◽  
Katashi Fujii ◽  
Hisakazu Horii ◽  
Yuya Hidekuma
Keyword(s):  
Surface Preparation ◽  
Corrosion Damage ◽  
Complete Removal ◽  
Tensile Tests ◽  
Steel Plates ◽  
Local Corrosion ◽  
Test Results ◽  
Axial Tensile ◽  
Defect Area ◽  
Cover Plates

There are a lot of corroded steel bridges, which have to be prolonged its life in Japan. Corroded members in these bridges generally have local corrosion damages, and are often repaired by covering on the corroded area with steel plates in order to rehabilitate the strength. Recently, adhesive such as epoxy resin is often used for bonding the cover plates made of steel or CFRP, even though high-tensile bolts or welding have been adopted conventionally. In this case, surface preparation is the most important issue to bond the cover plates completely. However, complete removal of rust and wastes are quite difficult in the fieldwork of surface preparation. This paper presents recovery effect of local corrosion damage by means of covering method used by adhesive when the rust is not completely removed. Axial tensile tests were conducted for rectangular steel plates of 1,100mm x 100mm x 12mm with 400mm length of corrosion-surface-unevenness on the both surfaces, and the defects of surface preparation are made by putting tape paper at the damaged area. Then various sizes of the repair plates are bonded to consider the influence to repairing. From the test results, the ultimate strength decreased 7-10% compared with non-rust state when the defect area rate was about 30%.

Corrosion Pattern for Critical Shear Buckling Load of a Web Panel with Local Corrosion Damage

2013 ◽  
Vol 421 ◽  
pp. 778-783
Author(s):  
Shigenobu Kainuma ◽  
Jin Hee Ahn ◽  
In Tae Kim
Keyword(s):  
Corrosion Damage ◽  
Buckling Load ◽  
Local Corrosion ◽  
Buckling Loads ◽  
Buckling Strength ◽  
Shear Buckling ◽  
Girder Bridge ◽  
The Web ◽  
Plate Girder

Shear buckling strength of a web panel with local corrosion damage can be changed by web corrosion pattern. In this study, To find critical corrosion pattern for shear buckling of a web panel with local corrosion. Critical shear bucking loads of the corroded web panels were quantitatively evaluated. Thus, FE analsyis models were creasted cosidering corrosion pattern in the plate girder bridge which was reported from the corroded bridge inpection. As corrosion pattern of the web panel in the plate girder bridge, three corrosion patterns were selected as main corrosion cases such as longitudinal, vertical, and triangular cases. Their critical shear buckling loads were compared according to their corroded web codition.

Experimental Study on Monitoring Steel Beam Local Corrosion Based on EMI Technique

2013 ◽  
Vol 273 ◽  
pp. 623-627 ◽  
Author(s):  
Jing Wen Yang ◽  
Hong Ping Zhu ◽  
Jing Yu ◽  
Dan Sheng Wang
Keyword(s):  
Lead Zirconate Titanate ◽  
Steel Structure ◽  
Mechanical Impedance ◽  
Corrosion Damage ◽  
Local Corrosion ◽  
Economic Losses ◽  
Steel Beam ◽  
Corrosion Monitoring ◽  
Uniform Corrosion ◽  
Corrosion Condition

The corrosion of the steel structure not only causes the economic losses, but also poses a threat to the safety of the structure. The steel structure corrosion form is divided into uniform corrosion and local corrosion. Lead zirconate titanate (PZT) as a smart material was widely used in structural health monitoring (SHM) in recent years. For local corrosion damage in the form, a steel beam local corrosion monitoring experiments based on Electro-Mechanical Impedance (EMI) technique was designed. Marine environment was simulated and the steel beam local corrosion condition was designed firstly. Then the surface-mounted PZT transducer was used on the structure for long-term monitoring. The development process of corrosion and the admittance change was researched. The result shows that EMI technique is available to the beam local corrosion monitoring by analyzing the change rule of admittance signal and resonant frequency deviation ratio index with the steel beam corrosion.

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