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, we have performed:

Potentiodynamic tests were performed to determine corrosion rates (CR) of 4340 Steel, Alloy 22 and Split Sets (SS46) rock bolts. The corrosion rates of Alloy 22 were determined by potentiodynamic scans and we have compiled results of other researchers who have used other techniques to evaluate corrosion rates of this material. A manuscript, entitled “Electrochemical Evaluation of Passive Corrosion Behavior of Alloy 22 In Complex Ionic Electrolyte,” has been prepared and included as a part of the report for condensed information. This manuscript has been recently submitted to Electrochimica Acta.


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