Document Type

Technical Report

Publication Date



Metallurgical and Materials Engineering, University of Nevada, Reno


This report shows the work done for this period in accordance to cooperative agreement of University of Nevada system for the Task 019 “Subsurface Corrosion Research on Rock Bolt System, Perforated SS Sheets and Steel Sets for the Yucca Mountain Repository”, the overall objective of which is to conduct corrosion research and predict the durability of rock-bolts and other underground metallic roof supports. We are performing oxidation tests using Thermogravimetric Analyzer (TGA), and Potentiodynamic tests to determine the corrosion rates of rock bolts, other support materials including bench mark materials.

In this quarter:

Potentiodynamic tests were performed to determine corrosion rates (CR) of 4340 Steel in 100X YM waters at several temperatures in deaerated condition.

EIS studies were performed on the 4340 steel at 100x YM waters.

Further studies on Swellex Rock bolts were performed by using individual ionic species found in the YM waters, such sulfate ions, bi carbonate ions etc.

The TGA had to be recalibrated and the anomalies of the modulated data for oxidation studies were performed for determination of accuracy of the data.

One Met Trans A. Paper is in print 2006, and 4 NACE proceeding papers have been published (listed above).

4 Papers presented at NACE Conference in Houston 2006.

Graduated one Ph.D student working YM on Alloy 22, and rock bolts.


Nevada – Yucca Mountain; Radioactive waste repositories; Rock bolts – Corrosion; Stainless steel – Stress corrosion


Materials Science and Engineering | Metallurgy | Structural Materials




Task ORD-FY04-019
Document No: SIP-UNR-040
DOE/UCCSN Cooperative Agreement Number DE-FC28-04RW12232