Affiliation:
1. Yuan-Ze University
2. National Defense University
Abstract
Passive film of stainless steels possesses good corrosion resistant property. However, the
passive film formed in nature is not uniform and the quality is not consistent. It is the major causes
for local corrosion. The pitting potential test is a traditional method to test local corrosion of
stainless steels. The local corrosion is usually induced by the break-down of the passive film.
Therefore, it can be utilized to evaluate the quality of the passive film. Also, because the pitting test
is quick and inexpensive, many tests can be performed to evaluate the uniformity of the passive
film. This study focuses on SS316 stainless steel. The specimens were treated with electropolishing
processes. The original and the processed specimens were tested by pitting potential tests. From
these results, the distribution and the uniformity of passive film could be evaluated. An efficient and
inexpensive index of the uniformity of the passive film is proposed.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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