ANALYSIS OF CORROSION PRODUCT RETRIEVED FROM THE PRIMARY TANK WALL IN THE ANNULUS OF TANK 241-AY-102

2003 ◽  
Author(s):  
R P ANANTATMULA
Keyword(s):  
Corrosion Product ◽  
Tank Wall

Analysis of existing approaches to modeling cyclic loading of the oil tank wall of marine terminals

2019 ◽  
pp. 110-113 ◽  
Author(s):  
N.N. Gorban ◽  
◽  
G.G. Vasiliev ◽  
I.A. Leonovich ◽  
◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Tank Wall ◽  
Oil Tank ◽  
Marine Terminals

Spectral Analysis Of CO2 Corrosion Product Scales On 13Cr Tubing Steel

2009 ◽  
Author(s):  
Guanfa Lin ◽  
Yaorong Feng ◽  
Zhenquan Bai ◽  
Jianmin Xiang
Keyword(s):  
Spectral Analysis ◽  
Corrosion Product ◽  
Co2 Corrosion

scholarly journals Effect of Oxide Scale Microstructure on Atmospheric Corrosion Behavior of Hot Rolled Steel Strip

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 517
Author(s):  
Bin Sun ◽  
Lei Cheng ◽  
Chong-Yang Du ◽  
Jing-Ke Zhang ◽  
Yong-Quan He ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Oxide Scale ◽  
Corrosion Product ◽  
Corrosion Behavior ◽  
Corrosion Test ◽  
Atmospheric Corrosion ◽  
Corrosion Mechanism ◽  
Type I ◽  
Rust Layer ◽  
Hot Rolled

The atmospheric corrosion behavior of a hot-rolled strip with four types (I–IV) of oxide scale was investigated using the accelerated wet–dry cycle corrosion test. Corrosion resistance and porosity of oxide scale were studied by potentiometric polarization measurements. Characterization of samples after 80 cycles of the wet–dry corrosion test showed that scale comprised wüstite and magnetite had strongest corrosion resistance. Oxide scale composed of inner magnetite/iron (>70%) and an outer magnetite layer had the weakest corrosion resistance. The corrosion kinetics (weight gain) of each type of oxide scale followed an initial linear and then parabolic (at middle to late corrosion) relationship. This could be predicted by a simple kinetic model which showed good agreement with the experimental results. Analysis of the potentiometric polarization curves, obtained from oxide coated steel electrodes, revealed that the type I oxide scale had the highest porosity, and the corrosion mechanism resulted from the joint effects of electrochemical behavior and the porosity of the oxide scale. In the initial stage of corrosion, the corrosion product nucleated and an outer rust layer formed. As the thickness of outer rust layer increased, the corrosion product developed on the scale defects. An inner rust layer then formed in the localized pits as crack growth of the scale. This attacked the scale and expanded into the substrate during the later stage of corrosion. At this stage, the protective effect of the oxide scale was lost.

scholarly journals Formation of Iron Sulfides on Carbon Steel in a Specific Cement Grout Designed for Radioactive Waste Repository and Associated Corrosion Mechanisms

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3563
Author(s):  
Mathieu Robineau ◽  
Valérie Deydier ◽  
Didier Crusset ◽  
Alexandre Bellefleur ◽  
Delphine Neff ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Radioactive Waste ◽  
Corrosion Product ◽  
Product Layer ◽  
Cement Grout ◽  
Radioactive Waste Disposal ◽  
Sulfide Concentration ◽  
Iron Sulfides ◽  
Corrosion Mechanisms ◽  
A Minor

Carbon steel coupons were buried in a specific low-pH cement grout designed for radioactive waste disposal and left 6 months in anoxic conditions at 80 °C. The corrosion product layers were analyzed by µ-Raman spectroscopy, XRD, and SEM. They proved to be mainly composed of iron sulfides, with magnetite as a minor phase, mixed with components of the grout. Average corrosion rates were estimated by weight loss measurements between 3 and 6 µm yr−1. Corrosion profiles revealed local degradations with a depth up to 10 µm. It is assumed that the heterogeneity of the corrosion product layer, mainly composed of conductive compounds (FeS, Fe3S4, and Fe3O4), promotes the persistence of corrosion cells that may lead to locally aggravated degradations of the metal. New cement grouts, characterized by a slightly higher pH and a lower sulfide concentration, should then be designed for the considered application.

Time-History Analysis of a Super-Large Storage Tank Under Seismic Excitation

2013 ◽  
Author(s):  
Fan Bu ◽  
Caifu Qian
Keyword(s):  
Storage Tank ◽  
Time History ◽  
Time History Analysis ◽  
Radial Deformation ◽  
Tank Wall ◽  
History Analysis ◽  
Medium Level ◽  
Wall Deformation ◽  
Slow Progress ◽  
Earthquake Action

In this paper, two finite element models are established for a super-large storage tank with or without a floating roof on the medium level. Time-history analysis with consideration of fluid-solid coupling for the deformation of tank wall and medium sloshing during or after an earthquake is performed with the emphasis on the effects of the floating roof. It is found that the upper part of tank is more sensitive to the earthquake action than the lower part. The wind girders and the reinforcing rings play a big role in limiting the radial deformation of the upper part of the tank wall. The floating roof has little effect on the tank wall deformation, but it is effective in suppressing the medium sloshing during the earthquake. After the earthquake, the radial deformation of the tank wall attenuates quickly, but the sloshing attenuation of the medium presents a slow progress and the floating roof inhibits the sloshing attenuation of the medium.

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