The Influence of Several Ions on Pitting Corrosion in Sedimentary Water of Oil Tank

2011 ◽  
Vol 317-319 ◽  
pp. 66-69
Author(s):  
Yong Zhang Zhou ◽  
Min Liu ◽  
Xin Ni ◽  
Dong Sheng Chen ◽  
Wu Ji Wei
Keyword(s):  
Crude Oil ◽  
Pitting Corrosion ◽  
Local Corrosion ◽  
Oil Tank

Hysteretic loops were used to study the influence of several ions in sedimentary water of oil tank on local corrosion at the bottom of crude oil tank, which were measured by the electrochemical station CHI660. The results indicated that the pitting increased firstly and then decreased with the increasing of the concentrations of each ion. The most serious pitting corrosion occurred under the following condition: the concentration of Cl-, SO42-, HCO3-, Mg2+, Ca2+ were 10.0 g/L, 1.0 g/L, 0.75 g/L, 0.35 g/L, 0.2 g/L, respectively.

scholarly journals Energy and Resource Utilization of Refining Industry Oil Sludge by Microwave Treatment

2020 ◽  
Vol 12 (17) ◽  
pp. 6862
Author(s):  
Chien Li Lee ◽  
Cheng-Hsien Tsai ◽  
Chih-Ju G. Jou
Keyword(s):  
Crude Oil ◽  
Microwave Power ◽  
Petroleum Refining ◽  
Microwave Treatment ◽  
Field Energy ◽  
Oily Sludge ◽  
Sludge Sample ◽  
Volatile Hydrocarbons ◽  
Benzene Toluene ◽  
Oil Tank

The oily sludge from crude oil contains hazardous BTEX (benzene, toluene, ethylbenzene, xylene) found in the bottom sediment of the crude oil tank in the petroleum refining plant. This study uses microwave treatment of the oily sludge to remove BTEX by utilizing the heat energy generated by the microwave. The results show that when the oily sludge sample was treated for 60 s under microwave power from 200 to 300 W, the electric field energy absorbed by the sample increased from 0.17 to 0.31 V/m and the temperature at the center of the sludge sample increased from 66.5 °C to 96.5 °C. In addition, when the oily sludge was treated for 900 s under microwave power 300 W, the removal rates were 98.5% for benzene, 62.8% for toluene, 51.6% for ethylbenzene, and 29.9% for xylene. Meanwhile, the highest recovery rates of light volatile hydrocarbons in sludge reached 71.9% for C3, 71.3% for C4, 71.0% for C5, and 78.2% for C6.

Failure of the Crude-Oil Tank Induced by Two Independent Corrosion Processes

2013 ◽  
Vol 577-578 ◽  
pp. 529-532 ◽  
Author(s):  
Jiří Sís ◽  
Bedřich Votava
Keyword(s):  
Corrosion Rate ◽  
Failure Analysis ◽  
Crude Oil ◽  
Weld Joint ◽  
Heat Affected Zone ◽  
Low Cycle Fatigue ◽  
Basic Material ◽  
Cycle Fatigue ◽  
Concrete Base ◽  
Oil Tank

Corrosion processes are frequent reasons of failure of materials in many applications. Results of failure analysis of the crude-oil tank after more than 30 years of service are summarized in this work. The failure was caused by two different and independent corrosion processes – corrosion in crude oil inside the tank and corrosion from concrete base under the tank. Both corrosion processes usually occur equally over the whole surface. In this case, however, both the corrosion processes occurred with distinctly higher corrosion rate in basic material alongside of heat affected zone of weld joint as well. The crack with length about 420 mm was the final result of these processes. The effect of low-cycle fatigue from filling and draining of crude oil is usually significant and was discussed as well.

Study of optimal layout based on integrated probabilistic framework (IPF): Case of a crude oil tank farm

2017 ◽  
Vol 48 ◽  
pp. 305-311 ◽  
Author(s):  
Mingguang Zhang ◽  
Zhan Dou ◽  
Longfei Liu ◽  
Juncheng Jiang ◽  
Ahmed Mebarki ◽  
...  
Keyword(s):  
Crude Oil ◽  
Optimal Layout ◽  
Probabilistic Framework ◽  
Tank Farm ◽  
Oil Tank

Whole cell bioreporter application for rapid detection and evaluation of crude oil spill in seawater caused by Dalian oil tank explosion

2013 ◽  
Vol 47 (3) ◽  
pp. 1191-1200 ◽  
Author(s):  
Dayi Zhang ◽  
Aizhong Ding ◽  
Shuangchao Cui ◽  
Cheng Hu ◽  
Steven F. Thornton ◽  
...  
Keyword(s):  
Crude Oil ◽  
Oil Spill ◽  
Rapid Detection ◽  
Whole Cell ◽  
Oil Tank ◽  
Crude Oil Spill

Boilover Starting Time of Small-Scale Crude Oil Tank

2013 ◽  
Vol 295-298 ◽  
pp. 564-567
Author(s):  
Da Wei Yang ◽  
Pei Hong Zhang ◽  
Bao Zhi Chen
Keyword(s):  
Crude Oil ◽  
Experimental Device ◽  
Small Scale ◽  
Starting Time ◽  
Oil Tank ◽  
Basic Characteristics

A small-scale crude oil tank boilover experimental device was established to study the basic characteristics of boilover phenomenon. The boilover starting time was mainly focused in order to make the proper fire rescue strategy. The results indicate that, the commonly used methods of predicting the boilover starting time show a relatively great deviation with the results obtained in experiments. The boilover starting time is linearly proportional to the parameter Ho/D0.5, which agrees Tan’s equation. However, Tan’s equation underestimates the boilover starting time when Ho/D0.5≤0.09 and overestimates the boilover starting time when Ho/D0.5>0.09.

Coatings for Crude Oil Tank Bottoms★

CORROSION ◽  
1957 ◽  
Vol 13 (4) ◽  
pp. 62-68
Author(s):  
R. M. CARTER
Keyword(s):  
Crude Oil ◽  
Epoxy Resin ◽  
Protective Coating ◽  
Coal Tar ◽  
Brand Names ◽  
Field Conditions ◽  
Oil Tank

Abstract Corrosion in the bottoms of field-erected tanks handling crude oil continues to be a problem, especially in areas where the oil contains aromatics or other elements that rapidly deteriorate the hot coal tar coatings generally used. New epoxy resin combinations and other coating innovations have brought forth materials that promise to withstand the more troublesome environments and to compete with the older bottom coatings for general use. However, the array of new brand names, chemical terms, unrelated service claims, etc., can become confusing to the operating man faced with the problem of selecting a protective coating for his particular tank. This paper describes a method successfully used to screen promising materials in the laboratory. It also discusses field conditions, application problems, and other factors that affect the selection and use of successful coatings. 7.5.5

Investigation on Corrosion Base Characteristics and Deep Dehydration Technology of Micro-Droplets in Oil Pipelines

2019 ◽  
Author(s):  
Kai Guo ◽  
Yuling Lv ◽  
Limin He ◽  
Xiaoming Luo ◽  
Donghai Yang
Keyword(s):  
Particle Size ◽  
Electric Field ◽  
Crude Oil ◽  
Pitting Corrosion ◽  
Dispersed Phase ◽  
Water Droplets ◽  
Size Change ◽  
Long Distance ◽  
Oil Pipelines

Abstract Corrosion is an important cause of steel pipeline failure and oil leakage, especially local pitting corrosion in long distance crude oil pipelines. Deep dehydration is of great significance to pipeline anticorrosion, however, further experimental results show that it is very difficult to achieve deep dehydration by a single electric field. Recent studies have shown that the particle size change of dispersed phase for the emulsion with large droplets after electromagnetic synergistic treatment is more obvious than that of a single electric field. In this study, the effect of micro-droplets on corrosion of oil pipelines are revealed. The role of micro-droplets in the process of microbial corrosion and electrochemical corrosion in a strong or weak acid solution for oil pipelines was summarized. A structural model of on-line tubular electromagnetic synergistic intensification coalescing device was established. The size change of particle of the dispersed phase in emulsions was studied. Crude oil and water were used as experimental materials, and the particle size distribution of dispersed phase in emulsions was tested by the evaluation system. The results showed that mean radius, d10 and d50 of water droplets in emulsion treated by electromagnetic synergism are larger than those treated by a single electric field. Strengthening droplets coalescence by electromagnetic synergism is also effective on emulsions whose particle size of the dispersed phase is less than 100μm. The role of micro-droplets in pitting corrosion is summarized based on corrosion channels. In the process of microbial corrosion and electrochemical corrosion in strong or weak acid solution, the role of water is presented in two aspects like participating in the reaction and providing ion electron transmission media. Analogous to culture medium, micro water droplets can be called corrosion medium for pitting corrosion in long-distance crude oil pipelines. A structural model of on-line tubular electromagnetic synergistic intensification coalescing device was established, including an electric field generation device and a magnetic field excitation component with orthogonal distribution and synchronous synergy. And emulsions are treated by electric and magnetic fields while flowing through the medium channel. The particle size change of dispersed phase in emulsions with average particle size of dispersed phase less than 100μm was experimental studied. It is found that mean radius, d10 and d50 of water droplets in emulsion treated by electromagnetic synergism are larger than that by a single electric field. Therefore, electromagnetic synergism can further enhance the dehydration depth compared with a single electric field.

Characteristics of Asphaltenes Thin Film Extracted from Crude-Oil-Tank-Bottom-Sludge (COTBS)

2019 ◽  
Author(s):  
Sundarajoo Thulasiraman ◽  
Noor Mona Md. Yunus ◽  
Pradeep Kumar ◽  
Zainal Arif Burhanudin ◽  
Cecilia Devi Wilfred ◽  
...  
Keyword(s):  
Thin Film ◽  
Crude Oil ◽  
Oil Tank ◽  
Tank Bottom
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