Document Type

Technical Report

Publication Date



Metallurgical and Materials Engineering, University of Nevada, Reno


This report encompasses the work done for third quarter in accordance to cooperative agreement of UCCSN for the Task 019 “Subsurface Corrosion Research on Rock Bolt System, Perforated SS Sheets and Steel Sets for the Yucca Mountain Repository”, the objective of which was proposed earlier, to conduct corrosion research and predict the durability of rockbolts and other underground metallic roof supports. We have recently started working on oxidation tests using Thermogravimetric Analyzer (TGA), stress corrosion cracking/hydrogen embrittlement studies on rock bolts, other support materials including bench mark materials.

In this quarterly report we will discuss “Dry” oxidation of steels and other supporting materials that are susceptible to oxidation under the repository conditions. William M.C. rock bolt and Split Sets rock bolt (HSLA steel made by “International Rollforms”) were tested by ramping from 50C to 500C with 1C/min scan rate under O2 atmosphere by using a Thermogravimetric analysis (TGA). In addition, isothermal oxidation test of Alloy 22 in Pure O2 atmosphere @ 980C using TGA was performed. The oxide samples were also examined by SEM.


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


Geotechnical Engineering | Materials Science and Engineering | Metallurgy | Structural Materials




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