Description Erosion-corrosion is a major isssue in downhole oil and gas extraction due to the presence of small sand particles which may become entrained in metallic seals.  The aim of this project is to investigate the erosion-corrosion of carbon nanotube materials.  Erosion-corrosion mechanism maps will be established based on the results. Key Objectives (i) Investigate effects of erosion-corrosion of carbon nanotube materials.(ii) To use SEM techniques to analyze the wear mechanisms.(iii) To construct erosion-corrosion maps to identify the wear mechanisms.