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PhD scholarship in New Tube Materials for Corrosion Control in Oil & Gas

Technical University of Denmark

Qualification Type: PhD
Location: Lyngby - Denmark
Funding for: UK Students, EU Students, International Students
Funding amount: Not Specified
Hours: Full Time
Placed On: 4th October 2018
Closes: 25th October 2018

PhD scholarship in New Tube Materials for Corrosion Control in Oil & Gas: Investigation of Steel Alloy Chemistry, Microstructure, and Surface Finish on Oil field Corrosion and Scaling 

The Materials and Surface Engineering section in the Department of Mechanical Engineering at the Technical University of Denmark are seeking candidate for 1 PhD position in the field of investigation steel alloy chemistry, microstructure, and surface finish on oil field corrosion and scaling. Proposed PhD project is a part of the work package conducted in collaboration between The Danish Hydrocarbon Research and Technology Centre (DHRTC) and Maersk Oil (MOG).

The PhD position is for 3-year period and expected to start from 1 January 2019.

Corrosion is a common problem in the oil and gas industry, which reduces the lifetime of well tubing material. An extensive internal corrosion of the tubing materials requires better corrosion resistant alloys. Understanding steel alloy chemistry and microstructural relation to corrosion is an important aspect. Another determining factor for scaling is the surface finish of the tubing, which dictates the kinetics of scale growth.

To prevent corrosion, e.g. corrosion inhibitors, H2S and O2 scavengers or biocides can be used. However, despite of using such mitigation techniques, extensive corrosion in the wells is still observed. The conditions present in the wells are complex and the severity of corrosion depends on various environmental (e.g. CO2/H2S/O2, seawater fraction, temperature, pressure, liquid flow velocity, stresses etc.) and material variables (e.g. chemical composition, microstructure, and surface finish).

Recent corrosion study made in collaboration between DHRTC, DTU and MOG, showed that the penetration depth related to pitting corrosion was increasing as a function of Seawater fraction (SW %). However, the nature of corrosion damage depends on the material used and its electrochemical behavior. Both low chromium and high chromium steels are used for production pipes, however the corrosion behavior vary significantly due to the passivating nature of the alloys. For example high chromium alloys are more susceptible for localized attack compared to low chromium alloys depending on the oil well conditions.

Responsibilities and tasks
The aim of this PhD project will be:  

  • Corrosion investigation of materials as a function of alloy chemistry and microstructure under sweet and sour conditions
  • Defining corrosion mechanisms vs alloys chemistry, microstructure, and heat treatment conditions
  • Detailed investigation of the passivity nature of steels with Ni, Mo, and other alloy additions
  • Scale formation on various types of steel, and correlation to alloy chemistry and surface finish. 

Application

To apply, please read the full job advertisement at www.career.dtu.dk

Application deadline: 25 October 2018

DTU Mechanical Engineering covers the fundamental engineering disciplines within Solid mechanics, Fluid mechanics, Coastal and Maritime Engineering, Energy systems and energy conversion, Materials and Surface Engineering, Manufacturing Engineering, Engineering design and Product development. The department has a scientific staff of about 150 persons, 95 PhD students and a technical/administrative support staff of about 80 persons. 

DTU is a technical university providing internationally leading research, education, innovation and scientific advice. Our staff of 6,000 advance science and technology to create innovative solutions that meet the demands of society, and our 11,200 students are being educated to address the technological challenges of the future. DTU is an independent academic university collaborating globally with business, industry, government and public agencies.

   
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