Analysis of a corrosion under insulation failure in a carbon steel refinery hydrocarbon line

Geary, W.

doi:10.1016/j.csefa.2013.09.001

Cited by 42 publications

(9 citation statements)

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“…A shutdown may also be necessary if the plant cannot operate with uninsulated pipes. On the other hand the consequences of not inspecting for corrosion can be catastrophic since a pipeline can rupture which usually results in the complete shutdown of a plant or process for an extended period [2]. A tool that provides screening of pipelines without removing the insulation pipe is therefore greatly beneficial to the industry.…”

Section: Introductionmentioning

confidence: 99%

Non-destructive testing of critical infrastructure with giant magneto resistive sensors

et al. 2016

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Corrosion is the leading failure mechanism for metallic structures. One of the standard non-destructive techniques to assess the status and predict remaining lifetime and possible failure is based on the excitation with a varying magnetic field and measuring the change of the magnetic field due to eddy currents in the device under test. Since the magnetic field is decaying quickly a large lift-off between the excitation source, magnetic sensors and the test object will reduce the signals considerably. In order to obtain a deep penetration into the test object excitation at low frequency is desirable. In this study investigation of a high power excitation system in combination with giant magneto resistance (GMR) based sensors was done. GMR sensors have a good sensitivity and are suitable for low frequency eddy current testing due to their low 1/f noise. Finite element analysis was used to evaluate the excitation setup, sensor alignment and positions and study the influence of different parameters of the excitation and sensor setup as well as the device under test. Based on these results a laboratory setup was build and used to study the influence of main measurement parameters.

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Section: Introductionmentioning

confidence: 99%

Non-destructive testing of critical infrastructure with giant magneto resistive sensors

et al. 2016

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“…During the insulation installation on steel pipes, air pockets may be left between the insulation layers, permitting moisture ingress [7]. Besides, water from rainfall, leaking pipes in the surroundings, and condensed moisture can sip into the insulation via metal joints or damaged cladding [8]. The moisture retained in the wet insulation weakens the adhesion of the coating beneath, resulting in holidays and then failure of the coating, thus allowing moisture to reach the steel surface and cause CUI [7,8].…”

Section: Introductionmentioning

confidence: 99%

Corrosion under insulation of pipeline steel in groundwater containing sulphate-reducing bacteria

Udowo

Mao

Liu

et al. 2023

Corrosion Engineering, Science and Technology

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Corrosion under insulation is a major economic concern in the safe operations of water, oil and gas steel pipes. Herein, the external corrosion of X80 pipeline steel was examined beneath a disbonded insulation in groundwater containing sulphate-reducing bacteria (SRB). The results show that the steel under the insulation exhibited different electrochemical behaviour from the uninsulated sample in the bulk solution. A galvanic effect was detected between the steel under insulation and the uninsulated sample. Spectroscopic analysis reveals the rust layer of the insulated steel immersed in the SRB-inoculated groundwater was enriched by FeS from microbial metabolism. The steel under insulation recorded severe localised perforation, while corrosion severity was reduced on the uninsulated sample. Diffusion of ions, film development and insulation degradation played important roles in steel corrosion.

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“…Due to the low price, carbon steel is widely used in industry, including the petrochemical industry [1][2][3][4]. Because of this, its corrosion has a great impact on the economic environment.…”

Section: Introductionmentioning

confidence: 99%

Study of S235 steel corrosion process in wastewater from the petrochemical industry

Chelaru¹,

Mureşan²

2019

Studia UBB Chemia

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The aim of this study is to investigate the corrosion behavior of low carbon steel (S235) used in petrochemical industry. The corrosion process was analyzed in simulated wastewater at different values of pH and at different temperatures and also in real wastewater from the exploitation of crude oil from Transylvania, Romania. Two commercial corrosion inhibitors (Nalco 73413 (Nalco Products, USA,) and Galoryl IC20 (ArrMazz Chemicals SAS, USA) were tested at different concentrations. The corrosion behavior was investigated by electrochemical impedance spectroscopy and potentiodynamic polarization measurements. Adsorption of these inhibitors was found to obey Langmuir adsorption isotherm.

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Analysis of a corrosion under insulation failure in a carbon steel refinery hydrocarbon line

Cited by 42 publications

References 0 publications

Non-destructive testing of critical infrastructure with giant magneto resistive sensors

Non-destructive testing of critical infrastructure with giant magneto resistive sensors

Corrosion under insulation of pipeline steel in groundwater containing sulphate-reducing bacteria

Study of S235 steel corrosion process in wastewater from the petrochemical industry

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