Emulsification reducing the corrosion risk of mild steel in oil–brine mixtures

Wang, Zeng Lin; Zhang, Jian; Wang, Zi Ming; Zhou, Liang; Han, Xiaobin; Li, Qing Fang; Gao, Song

doi:10.1016/j.corsci.2014.06.009

Cited by 37 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It seemed that in the 30% case larger droplets were more difficult to form owing to the deficiency in water resources compared with those in the 50% case. In the case of 70% water cut, a w/o emulsion could be formed after being stirred at 1200 rev min −1 for 6 min (Figure 9(e)), which had also been achieved in a previous experiment for the same crude oil [14]. Compared with that in lower water cut conditions, this as-prepared emulsion presented a much larger X c value of 21.7 μm together with a number of extremely large water droplets.…”

Section: Structure Of Oil-water Mixturesupporting

confidence: 79%

“…Obviously, water is the key factor in triggering steel corrosion in an oilwater mixture. The correlation between water content and corrosion rate has been widely investigated in various CO 2 partial pressures [8][9][10][11][12][13][14][15][16][17]. Generally, the measured corrosion rate increases with water cut following an 'S' curve [18].…”

Section: Introductionmentioning

confidence: 99%

“…At a low water cut, once the water phase is completely entrained into the oil phase, corrosion will cease in a flow condition [19]. The water-in-oil (w/o) emulsion or dispersion is believed to be non-corrosive and this notion has been applied to mitigate pipeline corrosion [13,14,20]. However, corrosion can still occur at a very low water cut [21], as water droplets or water layers can easily attach to steel surfaces [22,23].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fluid structure governing the corrosion behavior of mild steel in oil–water mixtures

Wang

Liu

Han

et al. 2020

Corrosion Engineering, Science and Technology

Self Cite

View full text Add to dashboard Cite

Corrosion was correlated with fluid-structure based on a comparative investigation of the corroded surface morphology of mild steel and the microscopic feature of oil-water mixture. It was found that the corrosion rate increased with increasing water cut and flow rate, while the corrosion morphology closely relied on the mixing state of oil and water. In high-pressure CO 2 saturated water-in-oil emulsions, the corrosion product particles grew gradually with enlarging water droplets at a low flow rate, but at a high flow rate an abrupt propagation of corrosion damage occurred when the water droplets were larger than a critical size, which could be attributed to the changed fluid behavior of water droplets near the steel surface. It provides a deep insight into the corrosion phenomena at the steel/fluid interface, which is helpful for the risk evaluation of aggressive multiphase fluids.

show abstract

Section: Structure Of Oil-water Mixturesupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fluid structure governing the corrosion behavior of mild steel in oil–water mixtures

Wang

Liu

Han

et al. 2020

Corrosion Engineering, Science and Technology

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, dielectric and capacitive properties for synthetic oil (named as lubricants) by using different electrochemical cells have been analyzed (Lvovich and Smiechowski, 2009; Lvovich and Smiecchowski, 2006; Lvovich and Smiecchowski, 2008). Moreover, dielectric and capacitive studies for different metals exposed to crude oil emulsion using at least two working electrodes arrangements have been studied (Lesaint et al , 2010; Førdedal et al , 1996; Freitas et al , 2013; Perini et al , 2012; Wang et al , 2014; Wei et al , 2010; Wang et al , 1999; Supakanapitak et al , 2012; Free, 2004). The above studies suggest that covered surfaces and corrosive water cut are taken into account when crude oil is emulsified.…”

Section: Introductionmentioning

confidence: 99%

The effect of non-ionic surfactant on the internal corrosion for X52 steel in extra-heavy crude oil-in-water emulsions

Quej-Aké

Contreras

Aburto

2018

ACMM

View full text Add to dashboard Cite

Purpose The purpose of this research is to study different extra-heavy crude oil-in-water emulsions that can be found in practice for corrosion process of X52 steel adding 60 mg.L-1 of non-ionic surfactant and a corrosion inhibitor (CI). Electrochemical impedance spectroscopy and Tafel plots are carried out. Thus, Bode-modulus and Bode-phase angle plots are discussed. Adsorption isotherms obtained from corrosion rate (CR) values are taken into account. Design/methodology/approach Two-electrode arrangement is used to characterize the pseudo-capacitance values for X52 steel exposed to water and crude oil phases, mainly. Electrochemical evaluations for X52 steel exposed to extra-heavy crude oil-in-water emulsions are recorded in a conventional three-electrode cell to study the corrosion process as was documented in detail by Quej-Ake et al. (2015). Therefore, all electrodes are placed as close as possible to eliminate the iR-drop. Findings Pseudo-capacitance analysis shows that X52 steel immersed in oilfield produced water was more susceptible to corrosion than that immersed in ocean water solution and extra-heavy crude oil phase. After being analyzed, the X52 steel surface coverage and adsorption process for surfactant and CI could be concluded that surfactant could protect the metal surface. In a coalescence extra-heavy crude oil-in-water emulsion, the water medium generated a new solution that was more corrosive than the original water phase. Wash crude oil process was provoked in emulsion systems to sweep up the salts, mainly. Thus, corrosive species that can be recovered inside extra-heavy crude oil may appear, and in turn a new more corrosive solution could be obtained. Taking into account the straight line obtained in Bode-modulus plot for X52 exposed to extra-heavy crude oil, it is possible to point out that the negative value of the slope or R2 can be related to a coefficient (Jorcin et al., 2006). It is important to mention that electrochemical responses for X52 steel exposed to extra-heavy crude oil-in-water under coalescence emulsions revealed that corrosion and diffusion processes exist. Therefore, a possible good inhibitor is surfactant in emulsion systems. Originality/value CR and anodic and cathodic slopes suggest that the surfactant acted as mixed CI. Of these, susceptible anodic (MnS and perlite or cementite) and cathodic (ferrite) sites on steel surface could be affected, due to which physicochemical adsorption could happen by using electrochemical parameters analysis. Thus, no stable emulsions should be taken into account for extra-heavy crude oil transportation, because corrosion problems in atmospheric distillation process of the crude oil due to stable emulsion cannot be easily separated. In this manner, coalescent emulsions are more adequate for transporting extra-heavy crude oil because low energy to separate the water media is required.

show abstract

“…A brief description of these models can be found in (NACE SP0208-2008). Wang et al (2014) experimentally suggested that the corrosion in oil-brine mixtures can be significantly retarded by forming a stable water in oil emulsion. This finding emphasizes the importance of predicting the onset of water in oil dispersion.…”

Section: Introductionmentioning

confidence: 99%

A numerical study on water wetting associated with the internal corrosion of oil pipelines

2016

View full text Add to dashboard Cite

show abstract

Emulsification reducing the corrosion risk of mild steel in oil–brine mixtures

Cited by 37 publications

References 17 publications

Fluid structure governing the corrosion behavior of mild steel in oil–water mixtures

Fluid structure governing the corrosion behavior of mild steel in oil–water mixtures

The effect of non-ionic surfactant on the internal corrosion for X52 steel in extra-heavy crude oil-in-water emulsions

A numerical study on water wetting associated with the internal corrosion of oil pipelines

Contact Info

Product

Resources

About