Anodic Aluminum Oxide Growth and Structure

Runge, Jude Mary

doi:10.1007/978-3-319-72177-4_6

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2018

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“…Presumably, spot corrosion occurs at weakly treated surface points. Since the anodic oxide film on the substrate is normally not uniform [18], weakly treated or damaged points are likely to be more severely attacked by galvanic corrosion. The third pattern observed was a scatter pattern, occurring occasionally on all specimens except SP07 and SP08.…”

Section: Resultsmentioning

confidence: 99%

Galvanic corrosion of aluminium alloy members of bridge guiderails under severe atmospheric exposure conditions

Mrema¹,

Itoh

Kaneko

2018

Corrosion Engineering, Science and Technology

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Aluminium alloys are nowadays preferred as materials for bridge guiderails especially for bridges connecting oceanic islands or spanning inlets due to their inherent corrosion resistance. But because of the limited mechanical strength of aluminium alloy, fasteners of guiderail members are made from steel materials. It has been found that contact between bare steel fasteners and aluminium alloy members can cause galvanic corrosion in the aluminium alloy. Research was carried out to investigate the capability of different surface treatments on fasteners and aluminium alloy members to inhibit galvanic corrosion under atmospheric exposure for periods of one and three years. It was found, among other results, that stainless steel fasteners treated with zinc flake coating were the most effective inhibitors of galvanic corrosion on aluminium alloy members.

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Section: Resultsmentioning

confidence: 99%