Search results

1 – 10 of 335
Content available
Article
Publication date: 1 December 2004

144

Abstract

Details

Anti-Corrosion Methods and Materials, vol. 51 no. 6
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 17 July 2018

Yan Baoxu and Kong Dejun

The amorphous Al-Ni-Fe-Gd coatings were fabricated to improve anti-corrosion performance of offshore platforms.

Abstract

Purpose

The amorphous Al-Ni-Fe-Gd coatings were fabricated to improve anti-corrosion performance of offshore platforms.

Design/methodology/approach

The amorphous Al-Ni-Fe-Gd coatings were first fabricated on S355 steel using the laser thermal spraying.

Findings

The amorphous forming capability and corrosion resistance increases with the laser powers increasing.

Research Limitations/implications

The amorphous Al-Ni-Fe-Gd coatings were applied on S355 steel of offshore platforms to increase its long-term heavy and anti-corrosion protection.

Originality/value

The amorphous Al-Ni-Fe-Gd coatings were first fabricated using a laser thermal spraying, improving its anti-corrosion.

Details

Anti-Corrosion Methods and Materials, vol. 65 no. 4
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 27 February 2020

Kong Dejun and Chen Haixiang

The purpose of this paper is to investigate the effects of laser power on the electrochemical corrosion performance in 3.5% NaCl, 0.1 M H2SO4 and 0.1 M NaOH solutions…

Abstract

Purpose

The purpose of this paper is to investigate the effects of laser power on the electrochemical corrosion performance in 3.5% NaCl, 0.1 M H2SO4 and 0.1 M NaOH solutions, which provided an experimental basis for the application of Al–Ti–Ni amorphous coating in marine environment.

Design/methodology/approach

Amorphous Al–Ti–Ni coatings were fabricated on S355 structural steel by laser thermal spraying (LTS) at different laser powers. The surface and cross-section morphologies, chemical element distribution, phases and crystallization behaviors of obtained coatings were analyzed using a scanning electron microscope, energy-dispersive X-ray spectroscope, X-ray diffraction and differential scanning calorimetry, respectively. The effects of laser power on the electrochemical corrosion performances of Al–Ti–Ni coatings in 3.5% NaCl, 0.1 M H2SO4 and 0.1 M NaOH solutions were investigated using an electrochemical workstation.

Findings

The crystallization temperature of Al–Ti–Ni coatings fabricated at the laser power of 1,300 and 1,700 W is ∼520°C, whereas that fabricated at the laser power of 1,500 W is ∼310°C. The coatings display excellent corrosion resistance in 3.5% NaCl and 0.1 M NaOH solutions, while a faster dissolution rate in 0.1 M H2SO4 solution. The coatings fabricated at the laser power of 1,300 and 1,700 W present the better electrochemical corrosion resistance in 3.5% NaCl and 0.1 M NaOH solutions, whereas that fabricated at the laser power of 1,500 W exhibits the better electrochemical corrosion resistance in 0.1 M H2SO4 solution.

Originality/value

In this work, Al-wire-cored Ti–Ni powder was first on S355 steel with the laser power of 1,300, 1,500 and 1,700 W, and the effects of laser power on the electrochemical corrosion performance in 3.5% NaCl, 0.1 M H2SO4 and 0.1 M NaOH solutions were investigated using an electrochemical workstation.

Article
Publication date: 6 June 2018

Chen Haixiang and Kong Dejun

In this study, an amorphous Al-Ti-Ni coating was fabricated on S355 steel using an arc spraying, and its corrosion behavior immersed in 3.5 per cent NaCl solution for 720…

Abstract

Purpose

In this study, an amorphous Al-Ti-Ni coating was fabricated on S355 steel using an arc spraying, and its corrosion behavior immersed in 3.5 per cent NaCl solution for 720 h was discussed, which provided an experimental basis for the application of arc sprayed Al-Ti-Ni coating on S355 steel on marine platform.

Design/methodology/approach

An amorphous Al-Ti-Ni coating was sprayed on S355 structural steel using an arc spraying. The surface-interface morphologies, chemical element compositions and phases of the obtained Al-Ti-Ni coating were analyzed using a scanning electron microscope, energy dispersive spectrometer and X-ray diffractometer, respectively. The distributions of chemical elements on the coating surface and interface were analyzed using an energy spectrum scanning; the bonding mechanism between the coating and the substrate was also discussed.

Findings

Financial support for this research by the Key Research and Development Project of Jiangsu Province (BE2016052).

Originality/value

In this study, an amorphous Al-Ti-Ni coating was fabricated on S355 steel using an arc spraying, its corrosion behavior immersed in 3.5 per cent 25 NaCl solution for 720 h was discussed.

Details

Anti-Corrosion Methods and Materials, vol. 65 no. 3
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 8 March 2021

Peng Li, Xiya Huang and Dejun Kong

The purpose of this paper is to investigate the effects of load and speed on the corrosive wear performance of Al coating in 3.5% NaCl solution, which provided an…

Abstract

Purpose

The purpose of this paper is to investigate the effects of load and speed on the corrosive wear performance of Al coating in 3.5% NaCl solution, which provided an experimental reference for the anti-corrosion engineering on offshore platforms.

Design/methodology/approach

A layer of Al coating was prepared on S355 steel using an arc spraying. The corrosive wear test was carried out with CFT–1 type surface property tester. The effects of load and speed on the corrosive wear performance of Al coating were investigated and the wear mechanism was also discussed. The electrochemical tests were conducted using a CHI660E type electrochemical workstation, the anti-corrosion mechanism was analyzed.

Findings

The average coefficient of frictions (COFs) of Al coating under loads of 1.5, 2.5 and 3.5 N are 0.745, 0.847 and 0.423, the wear mechanism is abrasive wear. The average COFs of Al coating at the speeds of 200, 400 and 600 rpm are 0.745, 0.878 and 0.617, respectively, the wear mechanism at the speeds of 200 and 400 rpm are abrasive wear, while that at the speed of 600 rpm is abrasive wear and fatigue wear. The anti-corrosion mechanism is the isolation of Cl corrosion and cathodic protection of sacrificial anode.

Originality/value

This paper mainly studied corrosive wear and electrochemical corrosion performances of Al coating. This study hereby confirms that this manuscript is the original work and has not been published nor has it been submitted simultaneously elsewhere. This paper further confirms that all authors have checked the manuscript and have agreed to the submission.

Details

Anti-Corrosion Methods and Materials, vol. 68 no. 2
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 1 November 1983

C.G. Wilkinson and L. Woolf

The parameters for Quality Control of both the anti‐corrosion coating and, where required, concrete weight coaling, are reviewed for six major pipelines in which the…

Abstract

The parameters for Quality Control of both the anti‐corrosion coating and, where required, concrete weight coaling, are reviewed for six major pipelines in which the authors have been directly involved. The importance of field joint anti‐corrosion coatings are discussed, particularly for concrete weight coated pipelines. The differing environment of each project is identified and includes “in‐service” temperature, water depth, mode of pipe lay, together with cathodic protection considerations. The importance of quality control is traced from initial design study to coating and includes practical aspects of on‐site quality assurance. Material selection, application, inspection, safety aspects and economics are discussed.

Details

Anti-Corrosion Methods and Materials, vol. 30 no. 11
Type: Research Article
ISSN: 0003-5599

Article
Publication date: 3 January 2017

Liu Wenming, Sheng Tianyuan and Kong Dejun

The purpose of this paper is to provide an experimental basis for studying the effects of laser remelting on the surface modification of arc-sprayed Al coating.

Abstract

Purpose

The purpose of this paper is to provide an experimental basis for studying the effects of laser remelting on the surface modification of arc-sprayed Al coating.

Design/methodology/approach

A layer of arc-sprayed Al coating on S355 steel was remelted with a CO2 laser, and the surface-interface morphologies, compositions of chemical elements and phases of Al coating were analyzed with scanning electron microscopy, energy disperse spectroscopy and X-ray diffraction, respectively. The effects of laser remelting on compositions of chemical elements and bonding performance of Al coatings were discussed.

Findings

The result shows that there are some pores existing on the Al coating surface after arc spraying, and the combination mode of coating interface is primarily composed of mechanical bonding. The pores on the Al coating reduce after laser remelting, which improves the compact performance, and the mechanical binding mode by arc spraying is changed into metallurgical bonding. The Fe and Al atoms at the coating interface are distributed with gradient, and the stratified enrichment is evident, which improves binding performance of the Al coating. The Al coating exhibits general corrosion before laser remelting and local corrosion after laser remelting, which improves the corrosion resistance of Al coating.

Originality/value

The arc-sprayed Al coating is remelted by CO2 laser, improving its microstructures and bonding mode with the substrate.

Details

Anti-Corrosion Methods and Materials, vol. 64 no. 1
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 1 July 1986

M.T. Copper, W.H. Thomason and J.D.C. Vardon

The development of the Hutton Field in the UK sector of the North Sea incorporates, for the first time, a buoyant Tension Leg Platform maintained in position by an array…

Abstract

The development of the Hutton Field in the UK sector of the North Sea incorporates, for the first time, a buoyant Tension Leg Platform maintained in position by an array of sixteen tubular steel tension leg strings. To satisfy the stringent design criteria associated with this new generation of offshore oil production facilities, all corrosion control systems have to be effective, reliable and contribute little to structure weight. An intensive review of the various available design options was undertaken, from which emerged the use of aluminium metal sprayed coatings as possibly the optimum method of corrosion control for the tension legs. Since there was limited service data available relating to the performance of sprayed metal coatings in sea water immersion service, a development programme was completed to determine the perfomance characteristics of these coatings under tension leg operating conditions. In parallel, the problems of applying the coatings were addressed since it was considered that, as for all coating systems, correct application is critical to the satisfactory in‐service performance of the coating. The potential advantages of sprayed metal coatings for immersion service in the offshore industry was significant.

Details

Anti-Corrosion Methods and Materials, vol. 33 no. 7
Type: Research Article
ISSN: 0003-5599

Article
Publication date: 1 March 1985

Corrosion control for the first North Sea T.L.P. Conoco's innovatory Hutton T.L.P. (tension leg platform) is the first of its kind to operate in the North Sea. The…

Abstract

Corrosion control for the first North Sea T.L.P. Conoco's innovatory Hutton T.L.P. (tension leg platform) is the first of its kind to operate in the North Sea. The structural concept is not the only new feature however, since significant advances in surface coatings technology are incorporated into the design.

Details

Anti-Corrosion Methods and Materials, vol. 32 no. 3
Type: Research Article
ISSN: 0003-5599

Article
Publication date: 1 April 1977

Alasdair Rankin

Corporate promotion of the 350 or so products and services available from the ICI/IMI Group for the Offshore Oil and Gas Industries is the task of a special unit—ICI…

Abstract

Corporate promotion of the 350 or so products and services available from the ICI/IMI Group for the Offshore Oil and Gas Industries is the task of a special unit—ICI Offshore, of London. Dr Alasdair Rankin of that organisation outlines some of the solutions to corrosion problems of offshore structures offered by this range of products.

Details

Anti-Corrosion Methods and Materials, vol. 24 no. 4
Type: Research Article
ISSN: 0003-5599

1 – 10 of 335