Passivation rates for small particulate aluminum in contact with oxide and nitride powders

V. Padilla*, J. Skrovan, Z. Gasem

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The self passivation of aluminum in water generally prevents the generation of hydrogen from an aluminum-water reaction in conditions preferred for portable systems. However the corrosion rate of aluminum powders is seen to greatly increase when in contact with alumina powder. This allows commercially useful amounts of hydrogen to be generated at moderate temperatures and neutral pH regions. Scratch tests were run on aluminum disks covered with oxide and nitride powders to look at repassivation rates after the surface film was disturbed and a decrease in the repassivation time observed. Small pellets of aluminum powder mixed with oxide or nitride powders were also studied with scratch events showing far lower current perturbation than seen for pure aluminum.

Original languageEnglish
Title of host publicationCorrosion (General) - 219th ECS Meeting
Pages43-52
Number of pages10
Edition17
DOIs
StatePublished - 2011

Publication series

NameECS Transactions
Number17
Volume35
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

ASJC Scopus subject areas

  • General Engineering

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