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Article
Publication date: 1 August 1959

Modern Aspects of Electrochemistry, No. 2. Edited by J. O'M. Bockris, D.SC., Ph.D., D.I.C., F.R.I.C. Butterworths Scientific Publications, 1959. Pp. ix + 416. 75s. This book is…

Abstract

Modern Aspects of Electrochemistry, No. 2. Edited by J. O'M. Bockris, D.SC., Ph.D., D.I.C., F.R.I.C. Butterworths Scientific Publications, 1959. Pp. ix + 416. 75s. This book is similar in nature, though different in subject matter, to the volume having a similar title published in 1954 as part of the Modern Aspects Series of Chemistry. The contents comprise five lengthy chapters, the choice of subjects having been made on the assumption that ‘electrochemistry is that branch of physical chemistry concerned with the properties of electrolytes and electrified interfaces.’

Details

Anti-Corrosion Methods and Materials, vol. 6 no. 8
Type: Research Article
ISSN: 0003-5599

Article
Publication date: 1 March 1979

Donald Stewart

Introductory electrochemistry What appears to be a solid piece of metal is really a collection of individual metal atoms held together by mutual attraction. When it is placed in…

Abstract

Introductory electrochemistry What appears to be a solid piece of metal is really a collection of individual metal atoms held together by mutual attraction. When it is placed in water, some of the more energetic atoms detach themselves and go into the water. When they do this they leave some of their electrons behind and emerge from the solid metal as positively charged particles called ions. This is usually shown as:

Details

Anti-Corrosion Methods and Materials, vol. 26 no. 3
Type: Research Article
ISSN: 0003-5599

Article
Publication date: 2 November 2012

Stefan Krakowiak, Kazimierz Darowicki and Kacper Jurak

The purpose of this paper is to examine the passive layer on 1050A aluminium alloy in non‐stationary conditions of linearly raised and lowered temperatures by means of dynamic…

Abstract

Purpose

The purpose of this paper is to examine the passive layer on 1050A aluminium alloy in non‐stationary conditions of linearly raised and lowered temperatures by means of dynamic electrochemistry impedance spectroscopy (DEIS).

Design/methodology/approach

The oxide passive layer on aluminium was examined using DEIS under non‐stationary conditions of linearly raised and lowered temperatures. In total, five heating‐cooling cycles were performed.

Findings

A significant change of impedance was observed only during the first cycle, which was called the forming one. During the subsequent cycles, the impedance of the system changed in a reversible manner.

Originality/value

The analysis using a equivalent circuit allowed us to determine a change of electric parameters of the circuit in the temperature function. Obtained changes of the electric parameters were correlated with layer structure.

Details

Anti-Corrosion Methods and Materials, vol. 59 no. 6
Type: Research Article
ISSN: 0003-5599

Keywords

Content available
Article
Publication date: 19 May 2012

356

Abstract

Details

Anti-Corrosion Methods and Materials, vol. 59 no. 3
Type: Research Article
ISSN: 0003-5599

Article
Publication date: 1 April 1979

Donald Stewart

The first half In the first part (March) the idea was introduced of the metal adopting an electrical potential when it is placed in a solution. This happened because some of the…

Abstract

The first half In the first part (March) the idea was introduced of the metal adopting an electrical potential when it is placed in a solution. This happened because some of the metal atoms went into the solution forming positively charged particles called ions, and leaving behind electrons in the metal. In shorthand notation:

Details

Anti-Corrosion Methods and Materials, vol. 26 no. 4
Type: Research Article
ISSN: 0003-5599

Article
Publication date: 2 November 2015

Juliusz Orlikowski, Kazimierz Darowicki, Agata Jazdzewska and Magdalena Jarzynka

The purpose of this paper is to implement the corrosion protection method for steel pipes used in a municipal water-pipe network. Results of an inhibitor protection system…

Abstract

Purpose

The purpose of this paper is to implement the corrosion protection method for steel pipes used in a municipal water-pipe network. Results of an inhibitor protection system installed on the system are presented. Inhibitor protection was required due to the high corrosivity of the water collected by a surface intake, which had resulted in a large number of failures and low water quality, due to the presence of corrosion products.

Design/methodology/approach

To assess the effectiveness of protection and to control the optimum dose of the inhibitor dispensed, an automatic system of corrosion monitoring was used, together with an assessment of water corrosiveness based on measurements of physical and chemical properties of water.

Findings

Calcium polyphosphate, in the role of a non-toxic corrosion inhibitor, showed significant effectiveness as a anticorrosive and its results were fully noticeable after several years following the commencement of protection. Corrosion monitoring has shown that the effectiveness of inhibitor protection is highest in the summer season, when the water is characterised as being in its most corrosive form.

Originality/value

A reduction in the corrosion rate improves the quality of water and its chemical parameters fall within the standard range for water intended for consumption. The corrosion inhibitor action accelerates the formation of a layer limiting the corrosion rate. In this case, stable corrosion rates may be obtained after only the first year. In terms of the designing systems for monitoring corrosion in water systems, this is very important information as reliable results can be obtained for a long period after the launch of the system.

Details

Anti-Corrosion Methods and Materials, vol. 62 no. 6
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 26 August 2014

Jacek Ryl, Anna Arutunow, Mateusz T. Tobiszewski and Joanna Wysocka

The purpose of this paper is to present a case study of unexpected sensitization to intergranular corrosion of highly resistant AISI 321 steel in petrochemical conditions, where…

Abstract

Purpose

The purpose of this paper is to present a case study of unexpected sensitization to intergranular corrosion of highly resistant AISI 321 steel in petrochemical conditions, where it was subjected to the simultaneous influence of elevated temperature of ∼250°C and vapors from the asphalt production process.

Design/methodology/approach

Corrosion coupons were exposed in an installation carrying asphalt vapors. To identify the susceptibility to intergranular corrosion a standard Strauss test was performed. Scanning electron microscopy (SEM) micrographs show a degree of degradation as a result of local corrosion. Influence of the carburization process occurred during exposure and depletion of chromium in the passive layer and was evaluated using X-ray photoelectron spectroscopy (XPS) and X-ray spectroscopy (EDX) techniques.

Findings

The paper provides information on origin of corrosion of AISI 321 steel in a high-carbon-containing environment. It was found out that long-term exposure can lead to intergranular corrosion in temperatures that are much lower than those that have been considered to be required for sensitization of austenitic steels. The high concentration of carbon introduced during the exposure is stated to be responsible for this effect.

Practical implications

The formation of chromium carbides, leading to intergranular corrosion of the Type 321 stainless steel, is a major concern. The paper reports that in certain petrochemical environments, highly resistant stainless steels, such as AISI 321, can be susceptible to intergranular carbide degradation.

Originality/value

The presence of titanium is not sufficient to increase resistance in multiple environments and sensitization can occur even at relatively low temperatures of ∼250°C.

Details

Anti-Corrosion Methods and Materials, vol. 61 no. 5
Type: Research Article
ISSN: 0003-5599

Keywords

Abstract

Details

Anti-Corrosion Methods and Materials, vol. 53 no. 3
Type: Research Article
ISSN: 0003-5599

Keywords

Content available
Article
Publication date: 15 March 2013

214

Abstract

Details

Anti-Corrosion Methods and Materials, vol. 60 no. 2
Type: Research Article
ISSN: 0003-5599

Article
Publication date: 29 May 2007

A.A. El Warraky, A.M. El‐Aziz and Kh.A. Soliman

The paper aims to study the dissolution of Al, Al‐3.84%Cu, Al‐5.22%Cu and Al‐11%Cu alloys in different concentrations of NaCl (10‐5‐10‐1 M).

Abstract

Purpose

The paper aims to study the dissolution of Al, Al‐3.84%Cu, Al‐5.22%Cu and Al‐11%Cu alloys in different concentrations of NaCl (10‐5‐10‐1 M).

Design/methodology/approach

The approach is to use open circuit potential (OCP) and potentiostatic polarization measurements.

Findings

Results obtained showed that, as the Cu content was increased in the Al‐Cu alloys, a steady state potential was rapidly reached. Addition of different concentrations of CuCl2 to 0.5 M NaCl demonstrated that by increasing the concentration of CuCl2 up to 2 ppm a greater increase in the OCP towards more anodic value occurred from the moment of immersion. Further increases in the concentration of CuCl2, up to 600 ppm, exhibited the same behavior.

Originality/value

The results of the study reveal that cathodic current was controlled by the oxygen in solution, while the anodic current increased with increased Cu content in the alloy.

Details

Anti-Corrosion Methods and Materials, vol. 54 no. 3
Type: Research Article
ISSN: 0003-5599

Keywords

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