<p>As of 2013, the damage caused by corrosion on highway
bridges has been estimated to cost approximately 14 billion dollars annually,
and this cost has been increasing over the years. Corrosion is one of the
natural phenomena that has been slowly deteriorating infrastructure systems
across the United States. One of the most problematic types of corrosion is
crevice corrosion, which is defined as the formation of rust between
overlapping surfaces such as the case of a splice connection where flanges are
attached by splice plates. A significant number of steel bridges in Indiana
have developed crevice corrosion in splice connections. Therefore, this
research focuses on the crevice corrosion, or “pack rust”, occurring in these
structural elements. The application of coatings alone has not been enough to
stop pack rust at these connections. In an attempt to look for approaches that
can effectively mitigate this problem and maintain the designed service life of
bridges, different strategies have been studied and tested. The first objective
of this study is to determine the strength reduction as a function of the time
of exposure to salt misting. To do this, specimens that simulate the bottom
flange splice connection have been exposed to a corrosive environment for different
periods of time and later tested under tension to assess the reduction in
strength. The second objective is to evaluate the effectiveness of the
mitigation strategies under different conditions. First, the mitigating
products were initially applied before exposure to salt misting. Second, the
mitigating products were applied as a repair, and in this case, the specimens
corroded for a given period of time and were then repaired to evaluate any
further deterioration. The assessment of the strategies’ effectiveness is based
on the strength reduction and visual inspection of the specimens. The ultimate
outcome of this study is a series of general guidelines to slow down crevice
corrosion based on the results of the laboratory testing. </p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/15046905 |
| Date | 26 July 2021 |
| Creators | Edgar Oscary Soriano Somarriba (11178333) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/thesis/CORROSION_MITIGATION_STRATEGIES_FOR_FLANGE_SPLICE_CONNECTIONS_IN_STEEL_BRIDGES/15046905 |
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