Technique for evaluating refractory corrosion in thermal gradient

Author

Rina Sane

Keywords and Phrases

Thermal gradient corrosion test

Abstract

"A thermal gradient refractory corrosion test has been devised that is capable of imposing a temperature gradient across a refractory test specimen. The major drawback to isothermal testing is that the entire test specimen is at same temperature, which is not representative of the conditions experienced by most industrial refractory linings. The thermal gradient test system includes a hydraulic lift to raise the specimen into place against a rigid refractory that allows for precise, reproducible specimen positioning. The system also allows for insertion of corrodants such as metal or glass from above, after the specimen has reached a steady state temperature gradient. The furnace is designed to achieve a maximum hot face temperature of 1700°C. To validate the design, tests were conducted with an aluminum alloy in contact with various refractory bricks and castables. These studies were conducted at a temperature of 1250°C for dwell times between 3 h and 12 h. Temperatures were measured at various points horizontally and vertically in the refractory to quantify the temperature gradient. Penetration depths, reaction layers and chemical reactions were studied using SEM/EDS and XRD. Penetration depths from the thermal gradient testing were compared to penetration depths from standard isothermal cup tests. The results obtained from the thermal gradient testing verify that the furnace produced a temperature gradient within the test piece and that the depth of penetration was affected. A general methodology is suggested for defining appropriate test times based on measured reaction rates and thermal gradients"--Abstract, page iii.

Advisor(s)

Fahrenholtz, William

Committee Member(s)

Smith, Jeffrey D.
Miller, F. Scott, 1956-

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Ceramic Engineering

Publisher

University of Missouri--Rolla

Publication Date

Summer 2005

Pagination

xi, 98 pages

Note about bibliography

Includes bibliographical references (pages 95-97).

Rights

© 2005 Rina Nandkumar Sane, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Subject Headings

Refractory materials -- Corrosion -- Testing
Refractory materials -- Design and construction
Corrosion and anti-corrosives -- Testing

Thesis Number

T 8747

Print OCLC #

62789830

Electronic OCLC #

1079366416

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

Recommended Citation

Sane, Rina, "Technique for evaluating refractory corrosion in thermal gradient" (2005). Masters Theses. 3727.
https://scholarsmine.mst.edu/masters_theses/3727