Effect of chloride and sulfate ions in simulated boiler water on pitting corrosion behavior of 13Cr steel

Niu, Li-Bin; Nakada, Kensuke

doi:10.1016/j.corsci.2015.04.005

Cited by 65 publications

(21 citation statements)

References 17 publications

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“…It is well established that the later stage of pitting corrosion is induced by the autocatalytic process of the localized acidification and therefor the acceleration in anodic dissolution. This is elicited by the confined self-promoting hydrolysis of the chloride iron ions [50]. On Mg surface, the corrosion and products forming occurred more randomly on localized sites in the initial stage (in the first 3 days), and then they tended to happen more uniformly on the whole area.…”

Section: Development Of Surface Changesmentioning

confidence: 99%

Comparative corrosion behavior of Zn with Fe and Mg in the course of immersion degradation in phosphate buffered saline

et al. 2016

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Section: Development Of Surface Changesmentioning

confidence: 99%

Comparative corrosion behavior of Zn with Fe and Mg in the course of immersion degradation in phosphate buffered saline

et al. 2016

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“…In the initial stage of the corrosion, an oxide layer is existing on the surface of the Fe matrix. Due to its small molecular structure, Cl − can pass through the oxide layer and gather on the surface of the metal matrix, and the oxide layer on the metal substrate is destroyed, thereby accelerating the corrosion of the metal substrate. In addition, Cl − can adsorb preferentially on the surface of the Fe matrix when Cl − and other anions coexist .…”

Section: Analysis and Discussionmentioning

confidence: 99%

Failure analysis of an oil pipe wall perforated by pitting corrosion

Zhang

Hou

Wei

et al. 2017

Materials & Corrosion

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Failures of underground oil pipes caused by pitting perforation are investigated in this paper. The chemical composition of the failed oil pipe was analyzed by the direct reading spectrometer, which is in accordance with China national standard GB/T699‐1999 for 20 steel. The failed parts were investigated by means of visual observation, optical microscope (OM) and scanning electron microscope (SEM). Energy‐dispersive X‐ray spectroscopy (EDS) of the inner pits were conducted. The results indicate that the pit on the failed oil pipe is composed of three smaller circular pits, on which a fatigue striation‐like pattern suggests a repetitionary pitting corrosion process, while pitting corrosion in the vertical direction is more serious. The failed position was located in the underground ditch where carbon dioxide (CO2) deposited and underwent wetting and drying cycles with an alternative of rainy and sunny days. Combined with the environment of the oil pipe, the simulation experiment, and corresponding mechanism analysis was conducted to evolve the mechanism of pitting corrosion, initiated by the synergistic effect of CO2 and chloride ions (Cl−), and impelled the production of FeCO3 corrosion agents providing an isolated space in a short time, meanwhile chloride ions proceed to propagate continuously into the inner pit, which could explain pitting corrosion is more serious in the vertical direction.

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“…For decades, steel has been used throughout the world as a structural material in applications such as tanks, heat exchangers, distillation towers, and pipelines, which in some cases can be exposed to acidic environments. [1][2][3][4] In contact with those acidic media, steel can suffer severe damage by corrosion processes, which leads to critical failures and affects the service life of facilities and devices. The use of corrosion inhibitors has been a smart strategy, widely employed in the industry, to enhance steel corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

N‐methyl‐2‐hydroxyethylammonium oleate ionic liquid performance as corrosion inhibitor for mild steel in hydrochloric acid medium

Schmitzhaus

Ortega-Vega

Schroeder

et al. 2020

Materials & Corrosion

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The aim of the present study is to evaluate the performance of N-methyl-2hydroxyethylammonium oleate ([m-2HEA][Ol]) as a corrosion inhibitor for mild steel in a 0.1-mol/L hydrochloric acid solution and also investigate the role of chloride in the inhibition mechanism. This protic ionic liquid (PIL) has formerly shown a high efficiency as a corrosion inhibitor in a neutral chloride medium. Electrochemical and weight loss measurements, surface contact angle determination, scanning electron microscopy, and Raman spectroscopy were used to understand the factors that influence the response of the studied inhibitor. Results revealed that [m-2HEA][Ol] behaves as a mixed-type adsorption inhibitor, by blocking cathodic sites and by modifying the activation energy of the anodic reaction, and it can reach up to 94-97% of inhibition efficiency. PIL adsorption was enhanced by the excess of positive charge of the mild steel. The effect of inhibitor molecule has been discussed to propose a mechanism that explains the inhibitory action of the corrosion inhibitor, pointing out the role of chloride in the inhibition mechanism.

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Effect of chloride and sulfate ions in simulated boiler water on pitting corrosion behavior of 13Cr steel

Abstract: The pitting corrosion behavior of 13Cr steel was investigated in simulated boiler waters containing chloride ions (Cl

Cited by 65 publications

References 17 publications

Comparative corrosion behavior of Zn with Fe and Mg in the course of immersion degradation in phosphate buffered saline

Comparative corrosion behavior of Zn with Fe and Mg in the course of immersion degradation in phosphate buffered saline

Failure analysis of an oil pipe wall perforated by pitting corrosion

N‐methyl‐2‐hydroxyethylammonium oleate ionic liquid performance as corrosion inhibitor for mild steel in hydrochloric acid medium

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