Can I read Galvanic compatibility of corrosion protective coatings with AA7075 aluminum alloy on EtoBox?

Galvanic compatibility of corrosion protective coatings with AA7075 aluminum alloy by Z. F. Lodhi; W. J. Hamer; J. M. C. Mol; H. Terryn; J. H. W. de Wit is a Materials Science article available to read on EtoBox.

What is Galvanic compatibility of corrosion protective coatings with AA7075 aluminum alloy about?

## Abstract The galvanic compatibility of aerospace aluminum alloy AA7075 with cadmium (Cd), zinc (Zn), and zinc–cobalt–iron (Zn–Co–Fe, 32–37%Co and 1%Fe) alloys was investigated. A comparison of open circuit potential [OCP __vs.__ saturated calomel electrode (SCE)] measurements in 0.6 mM NaCl showed that all coatings would act anodically to AA7075 with an exception of Zn–Co–Fe (37%Co + 1%Fe) alloy which was electropositive to AA7075. During the zero resistance ammetry (ZRA) measurement in 0.6 M NaCl electrolyte the coupled OCP and current density were measured during 7 days of immersion and both Zn and Cd acted anodic and thus sacrificial to AA7075. Galvanic coupling of AA7075 with (37%Co + 1%Fe) Zn–Co–Fe alloy resulted in the consequent dissolution of the AA7075 aluminum alloy. In contrast, Zn–Co–Fe (32%Co + 1%Fe) alloy was found to be anodic to AA7075 during the first 26 h of immersion but after dezincification and cobalt enrichment at the surface became cathodic to the AA7075 aluminum alloy. During coupling with Zn, some pitting was also observed on AA7075.

Who reads Galvanic compatibility of corrosion protective coatings with AA7075 aluminum alloy?

Author

Z. F. Lodhi; W. J. Hamer; J. M. C. Mol; H. Terryn; J. H. W. de Wit

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 0947-5117)

Published

2008

Language

EN

Field

Materials Science (Physical Sciences)