NSTD Research Projects: TRP
TRP 23. Corrosion Barrier Development for LBE Corrosion Resistance
July 2004 - November 2007
Research Objectives & Methods
The objective of this project is to develop a novel nanostructure based coating technology that will provide significantly improved corrosion resistance for steel in LBE at elevated temperatures (500-600 °C), as well as provide long-term reliability under thermal cycling.
The nanostructure based coatings will consist of a layer of nanoporous alumina having pores filled with an oxidizing metal, such as Cr, followed by a capping layer of alumina. Alumina, which is a robust anti-corrosion material, provides corrosion resistance at elevated temperatures. The Cr serves two purposes:
- it acts as a solid filler material for the pores in the alumina, enhancing its mechanical and chemical integrity, and
- it acts as a second layer of defense against corrosion by providing a replenishable source of Cr (for the formation of a chromium oxide protective layer) in case the alumina layer is compromised.
The innovation of this project is the use of a nanoporous alumina layer for the coating, which is mechanically flexible and can expand and contract with the underneath steel surface. As a result, the mechanical integrity of the coating is preserved under thermal cycling. In addition to their usefulness at higher temperatures, the proposed coatings can also provide increased reliability at lower temperatures by complementing the oxygen control technique. The nanostructure based coatings developed in this project will significantly enhance the long-term reliability of steel structures in LBE at elevated temperatures and under thermal cycling.
During Year 3 of the project (2006-2007), extensive investigation was carried out on the deposition of longer and improved quality metal nanowires inside the pores using a new technique, as well as the establishment of the experimental setup for characterization of the coatings.
- Biswajit Das, Electrical and Computer Engineering
- Arghya Banerjee, Electrical and Computer Engineering
- Nilanjan Halder, Electrical and Computer Engineering
- Kishire Sreenivasan, Electrical and Computer Engineering
- Stuart Maloy, AFCI Fuels & Materials Project Leader, Los Alamos National Laboratory
- Rani Krishna, Masters, Electrical and Computer Engineering
Saurabh Mookerjea, Masters, Electrical and Computer Engineering
(MS Thesis Not Available)
- Pavan Singaraju, Masters, Electrical and Computer Engineering
- Karina Diestra, Undergraduate, Electrical and Computer Engineering
- Lillian Ratliff, Undergraduate, Electrical and Computer Engineering
- Jonathan Ross, Undergraduate, Electrical and Computer Engineering
- Michael Sadowitz, Undergraduate, Electrical and Computer Engineering
- Tan Wu, Undergraduate, Electrical and Computer Engineering