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RESEARCH PAPERS

Corrosive Wear of Cast Iron in Sulphuric Acid

[+] Author and Article Information
Y. Yahagi, Y. Mizutani

Toyota Central Reseach and Development Labs., Inc., Nagakute, Aichi-Ken, 480-11 Japan

J. Tribol 109(2), 238-242 (Apr 01, 1987) (5 pages) doi:10.1115/1.3261345 History: Received February 21, 1986; Online October 29, 2009

Abstract

The wear rate of cast iron and the corrosion potential (Ecorr) and current (Icorr) were measured in sulphuric acid in order to study the mechanism of corrosive wear of cast iron. The corrosive wear rate of cast iron was found to reach a maximum at around 35 wt. percent sulphuric acid concentration and increase with load and acid temperature. The increment of corrosion current, i.e., the dissolution rate of Fe ion, due to friction (ΔIcorr) was found to correlate with the corrosive wear of cast iron. It has been concluded that the combined action of the changed properties and profile of corroded rubbing surfaces and the mechanical destruction due to wear causes the drastic corrosive wear, which is much greater than the wear seen with either one alone.

Copyright © 1987 by ASME
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