Corrosion mechanism of corrosion-resistant steel developed for bottom plate of cargo oil tanks

Sun, Feilong; Li, Yong; Zhang, Fan; Cheng, Xuequn; Zhang, Cheng; Wu, Nianchun; Yin, Yuqun; Zhao, Jinglei

doi:10.1007/s40195-012-0231-0

Cited by 30 publications

(10 citation statements)

References 20 publications

(21 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increasing global energy demand continues to push oil companies into deeper and deeper waters in search of economically recoverable reserves of oil and gas [1][2][3]. However, for the marine structures, the effects of the elements and applied loads potentially result in unsafe conditions.…”

Section: Introductionmentioning

confidence: 99%

Underwater Wet Welding for HSLA Steels: Chemical Composition, Defects, Microstructures, and Mechanical Properties

Gao

Wang

Cheng

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

The effect of water depth on underwater wet welds was investigated by underwater wet shielded metal-arc welding technique. The microstructures, chemical composition, welding defects, and mechanical properties were studied. The contents of alloying elements decrease, while the oxygen content increases with water depth. Within 55 m depth, the carbon monoxide reaction is controlling the oxygen content which will further control the contents of alloying elements. The columnar microstructures in weld metal obtained at shallow water consist of grain boundary ferrite, side-plate ferrite, and acicular ferrite, while those at depth greater than 11 m exhibit more proeutectoid ferrite due to the loss of alloying elements. Mechanical properties are a strong function of depth owing to the increase in oxidation of alloying elements and porosity. Welds obtained within 11 m show preferable strength, ductility, and toughness. The mechanical properties significantly drop from 11 to 25 m because of the increased porosity and oxidation of alloying elements.

show abstract

Section: Introductionmentioning

confidence: 99%

Underwater Wet Welding for HSLA Steels: Chemical Composition, Defects, Microstructures, and Mechanical Properties

Gao

Wang

Cheng

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

show abstract

“…[9][10][11][12] However, very few studies on the corrosion behavior of COT steel have been reported. [13][14][15] The evaluation methods of corrosion resistance have been widely concerned. Weigh loss measurement is the most direct and reliable method but time consuming and information limited, therefore the corrosion resistance has been investigated by simulated and accelerated corrosion tests.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Corrosion Performance of Low Alloy Steel in Acid Sodium Chloride Solution

Yu¹,

Gao²,

Wang³

2015

Electrochemistry

View full text Add to dashboard Cite

The corrosion behavior of low alloy steel for cargo oil tanks (COT) is investigated by thermo mechanical control process (TMCP) at various cooling rates. The corrosion rate is estimated by accelerated corrosion test in strong acid sodium chloride solution. The corrosion mechanism is studied by potentiodynamic polarization curve and electrochemical impedance spectroscopy (EIS) measurements. It indicates that the acicular ferrite is refined as the cooling rate increases, the CR15 steel with higher cooling rate exhibits good corrosion resistance with a less weight loss, lower corrosion current density and bigger impedance modulus than steels CR10 and CR12.

show abstract

“…Sun et al . developed new corrosion resistant steel which was composed of ferrite and bainite for crude oil tank. The composition and element distribution of corrosion products were studied by micro Raman spectroscopy and energy dispersive spectrometer.…”

Section: Resultsmentioning

confidence: 99%

“…X-ray diffraction analysis of the corrosion products of these two materials showed that the corrosion products were mainly CaCO 3 and FeS, among others. Sun et al [13] developed new corrosion resistant steel Table 2. SEM images of coupon surfaces corroded by different sedimentary liquids at ambient temperature.…”

Section: Static Coupon Testmentioning

confidence: 99%

Study of corrosion of oil tank parts and gas‐phase space in different tanks

Wang

Dou

et al. 2018

Process Safety Progress

View full text Add to dashboard Cite

In the coal direct liquefaction process line distribution of finished oil tanks and semifinished oil tanks, corrosion of tank reservoir parts and the gas phase are important. To prove the corrosion‐influencing factors and corrosion processes of various parts of the storage tank, further research was carried out based on the previous research. As the process of corrosion of the tank wall is affected by the sulfur element in oil, the sulfur content in refined oil and semi‐refined oil was analyzed first. The results show that: the sulfur content is high for hydro‐upgrading feed oil and hydro‐stabilizing feed oil, but the sulfur content is low for thick condensed oil and diesel. The tank is mainly made of 16MnR and Q235‐b steel in the process plant. In this article, 16MnR and Q235‐b steel coupons are used for static coupon experiments and electrochemical experiments to determine the influencing factors and processes that affect the corrosion of the reservoir and the gas phase. The static coupon tests show that the corrosion rates are similar for 16MnR and Q235‐b steel coupons in the reservoir location and for the gas‐phase parts. And, the corrosion rates decrease with time. The corrosion rates of 16MnR and Q235‐b steel in hydro‐stabilizing feed oil are relatively high, and the corrosion rates of 16MnR and Q235‐b steel are relatively low, though the difference is not significant. The 16MnR corrosion rate is relatively high in the reservoir location compared to that of the gas phase. The corrosion rate of Q235‐b steel in the gas‐phase space is relatively higher than that of the reservoir location. Electrochemical tests show that the corrosion rates of 16MnR and Q235‐b steel in hydro‐stabilizing feed oil are higher than those in the other three oils. Finally, the effect of temperature on the corrosion rate was studied by the static coupon experiment. The results show that the corrosion rates of 16MnR steel and Q235‐b steel in the four kinds of oil products increase first and then decrease when the temperature changes from 70 to 110°C. The corrosion rate reaches the maximum when the temperature is 90°C. The research of this article can provide some technical support and help for the corrosion protection and safety design of oil tanks in the direct liquefaction process. © 2018 American Institute of Chemical Engineers Process Process Saf Prog 37:419–426, 2018

show abstract

Corrosion mechanism of corrosion-resistant steel developed for bottom plate of cargo oil tanks

Cited by 30 publications

References 20 publications

Underwater Wet Welding for HSLA Steels: Chemical Composition, Defects, Microstructures, and Mechanical Properties

Underwater Wet Welding for HSLA Steels: Chemical Composition, Defects, Microstructures, and Mechanical Properties

Electrochemical Corrosion Performance of Low Alloy Steel in Acid Sodium Chloride Solution

Study of corrosion of oil tank parts and gas‐phase space in different tanks

Contact Info

Product

Resources

About