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Article
Publication date: 1 June 2005

Xie Xuejun, Yang Wanqin, Cao Shunan, Pan Ling, Gong Xunjie and Peng Keru

To study the corrosion behavior and discuss the corrosion mechanism of No. 20 carbon steel in water in the presence of sulfide ions.

471

Abstract

Purpose

To study the corrosion behavior and discuss the corrosion mechanism of No. 20 carbon steel in water in the presence of sulfide ions.

Design/methodology/approach

The mass‐loss method, electrochemical tests and surface analysis were used to study the corrosion behavior and discuss the corrosion mechanism of No. 20 carbon steel in water in the presence of sulfide ions.

Findings

General corrosion occurred when No. 20 carbon steel was immersed in both test solutions (concentrated sample with S2− added to 0.8 mg/L, and pure concentrated sample with no S2− added). The presence of S2− in test solutions accelerated the corrosion rate of No. 20 carbon steel.

Practical implications

In order to prevent No. 20 carbon steel in water with S2− from corroding, S2− must be removed.

Originality/value

It was found that the presence of S2− in test solutions accelerated the corrosion rate of No. 20 carbon steel in this paper. Therefore, when water containing sulfide ions is used as the source of make‐up water and cooling water, S2− in water must be removed to prevent the pipelines and facilities from corroding. This means the research results can offer theoretical guidelines for the prevention of pipelines and facilities in the power plant from corroding.

Details

Anti-Corrosion Methods and Materials, vol. 52 no. 3
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 18 September 2007

Xuejun Xie, Ling Pang, Shunan Cao, Wanqin Yang, Min Yan, Xunjie Gong and Keru Peng

The purpose of this paper is to present a study of corrosion inhibition of carbon steel in hydrochloric acid by some benzene nitriles using the quantum chemistry calculation.

356

Abstract

Purpose

The purpose of this paper is to present a study of corrosion inhibition of carbon steel in hydrochloric acid by some benzene nitriles using the quantum chemistry calculation.

Design/methodology/approach

The molecular structure and inhibition mechanism, and the relationship between inhibition efficiency of some benzene nitriles on carbon steel in the hydrochloric acid, were studied from a microcosmic viewpoint using the quantum chemistry calculation.

Findings

The calculation results showed that the inhibition efficiency of benzene nitriles on carbon steel in hydrochloric acid could be expressed by σN and ELUMO, and the greater σN absolute value and the lesser the value of ELUMO, then the greater the efficiency of the inhibitor. The regression equation for benzene nitriles is: η=2.665056−0.4447122ELUMO−10.92817σN r=0.9953128.

Originality/value

The paper offers insights into the application of the quantum chemistry calculation.

Details

Anti-Corrosion Methods and Materials, vol. 54 no. 5
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 16 January 2007

Xuejun Xie, Lijun Du, Ling Pan, Shunan Cao, Min Yan and Wanqin Yang

This paper aims to study the corrosion behaviour of copper alloys HSn70‐1 + As and B30 in water with sulphide.

333

Abstract

Purpose

This paper aims to study the corrosion behaviour of copper alloys HSn70‐1 + As and B30 in water with sulphide.

Design/methodology/approach

The mass‐loss method, electrochemical tests and surface analysis were used to study the corrosion behaviour of copper alloys HSn70‐1 + As and B30 in water with sulphide.

Findings

Dezincification corrosion occurred on HSn70‐1 + As both in water with or without sulphide, and sulphide in water accelerated corrosion, while for the copper alloy B30, the corrosion rates were very small both in water with or without sulphide, although corrosion was also accelerated by sulphide in water.

Practical implications

In order to prevent copper alloys HSn70‐1 + As and B30 in water with sulphide from corroding, S2− must be removed.

Originality/value

It was found that sulphide in water accelerated the corrosion of copper alloys HSn70‐1 + As and B30 in this paper. Therefore, when water containing sulphide is used as the source of make‐up water and cooling water, S2− in water must be removed to prevent the pipelines and facilities from corroding. This means that the research results can offer theoretical guidelines for the prevention of pipelines and facilities in the power plant from corroding.

Details

Anti-Corrosion Methods and Materials, vol. 54 no. 1
Type: Research Article
ISSN: 0003-5599

Keywords

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Article
Publication date: 28 January 2022

Luis Manuel Quej-Ake, Sergio García Jiménez, Hongbo Liu, J.L. Alamilla and Carlos Angeles-Chavez

The purpose of this paper is to study the corrosion process by examining the deterioration of X80 steel exposed to a real petroleum sample containing condensed hydrocarbon plus…

89

Abstract

Purpose

The purpose of this paper is to study the corrosion process by examining the deterioration of X80 steel exposed to a real petroleum sample containing condensed hydrocarbon plus oilfield-produced water, which were subjected to stimulated emulsions in flowing media at 50°C.

Design/methodology/approach

The impedance and polarization spectra were used to assess the aggressiveness of the petroleum sample and tried to find a washing process using condensed hydrocarbon with deionized water. Mössbauer technique was used to identify the phases in precipitated ions obtained during an oven-drying procedure of the oilfield produced water.

Findings

The emulsion, chloride, sulphur compounds, heavy metals and the use of a double hydrodynamic system were the most important factors affecting the corrosion of X80 steel. The corrosion rate of this steel increased when oilfield-produced water was stimulated by a double hydrodynamic system (4.56 mm/year). It was determined to be 7.66 mm/year and 4.01 mm/year when steel was exposed to a stimulated emulsion using the petroleum sample and condensed hydrocarbon with deionized water at 24 h, respectively, suggesting that a significant process of hydrocarbon washing could occur and a more corrosive solution was highlighted. Mössbauer results showed that the ions precipitates included the following phases at Wt.%: magnetite (20.0), greigeite (22.8), siderite (3.2), pyrite (2.9), marcasite (26.7) and mackinawite (24.4).

Originality/value

A stimulated hydrocarbon/water emulsions with a more homogeneous solution containing high concentrations of saline compounds and heavy metals were used to simulate the susceptibility to corrosion on the internal pipeline steels exposed to any type of immiscible liquids such as condensed hydrocarbon, or crude oil, containing water. A practical application of the presented research could provide a novel framework for understanding the internal corrosion in pipelines from the simulation of washed hydrocarbons after the stimulated emulsions that can be found in the field. Because more susceptibility to corrosion for pipeline steels would be expected at the end of the transportation of the fluid. It is possible to investigate the possible corrosion mechanisms by using a dried oilfield-produced water sample interacting with the pipeline steels.

Details

Anti-Corrosion Methods and Materials, vol. 69 no. 2
Type: Research Article
ISSN: 0003-5599

Keywords

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