PhD Research Project

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Deposition of Calcareous Films for Corrosion Control

School of Materials

University of Manchester

Supervisor: Dr R.A. Cottis

Collaborators: Dr S.B. Lyon
Professor Jon Lloyd
Dr N Henderson, Mott-McDonald Ltd.

Project to Start: As soon as possible.

It is well known that calcareous films (deposits of calcium carbonate and magnesium hydroxide) are produced on steel structures that are cathodically-protected in seawater.

It is also recognised that such deposits will reduce the current demand from the cathodic protection system, and that they may act as protective coatings for a period.

It has been proposed that the controlled deposition of a calcareous film could provide long-term corrosion protection for steel in seawater.

The objective of this project is to examine the effect of deposition conditions on the properties of the calcareous film.

The project will use a range of deposition conditions, including pulsed current methods, to deposit calcareous films in the laboratory.

The properties of these films will then be assessed by a range of methods, including electrochemical impedance spectroscopy, observation by light and scanning electron microscopy and mechanical testing.

The objective of this component of the project will be to develop a specification for a practical treatment method for use in the field.

An additional component of the treatment will be the sterilization of the metal to stop a form of microbially-induced corrosion, known as Accelerated Low-Water Corrosion (ALWC).

The sterilization will be achieved electrochemically, using chlorine generated anodically; there may also be an effect of dislodgement of micro-organisms by the applied potential.

The final stage of the project will be the performance of field trials in collaboration with industrial partners in the project.

The PhD research project will be supported by EPSRC, in collaboration with the Department for Industry and offers a standard EPSRC grant.

The grant is available to EU/UK students although some support may be available for exceptional non EU candidates.

Applicants should hold a minimum 2:2 (Hons) degree in a Science or Engineering subject

To Apply: Complete the online application form on University website.

For further information please contact Emma Ward on Emma.Ward [at] manchester.ac.uk

References

A thorough review of the ALWC problem has been produced by the partners in this project, and can be consulted on application to Dr Cottis.

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