BROWSE

Related Researcher

Author's Photo

Lee, Zonghoon
Atomic-Scale Electron Microscopy (ASEM) Lab
Research Interests
  • Advanced Transmission Electron Microscopy (TEM/STEM), in Situ TEM, graphene, 2D materials, low-dimensional crystals, nanostructured materials

ITEM VIEW & DOWNLOAD

A comparison of the corrosion behavior of nanocrystalline and conventional Al 5083 samples

Cited 17 times inthomson ciCited 18 times inthomson ci
Title
A comparison of the corrosion behavior of nanocrystalline and conventional Al 5083 samples
Author
Kus, ELee, ZonghoonNutt, SMansfeld, F
Keywords
Al 5083; Electrochemical impedance spectroscopy; Nanocrystalline aluminum alloys; Nitric acid mass loss test; Pitting scan; Scanning electron microscopy; Sodium chloride; Sodium sulfate
Issue Date
2006-02
Publisher
NATL ASSOC CORROSION ENG
Citation
CORROSION, v.62, no.2, pp.152 - 161
Abstract
Pitting scan (PS) and electrochemical impedance spectroscopy (EIS) techniques were used to evaluate the corrosion behavior of nanocrystalline (NC) samples and conventional Al 5083 (LTNS A95083) in three solutions with different chloride concentrations. The PS obtained in 0.5 N sodium chloride (NaCl) and in 0.5 M sodium sulfate (Na2SO4) + 0.1 N NaCl indicated that pitting should occur in these solutions. These results were confirmed by EIS data that were recorded for up to 25 days. For exposure to 0.5 M Na2SO4 + 0.05 N NaCl the pitting (E-pit) and protection (E-prot) potentials determined after exposure for 2 h suggested that pitting would not occur in this solution. However, the initial impedance spectra were indicative of pitting. Tests carried out after exposure for 2 days and 3 days showed passive behavior, but starting with exposure for 5 days, pitting was again indicated for all three samples. PS performed at the end of the EIS tests suggested that this result was due to the increase in corrosion potential (E-corr) over, the E-prot values recorded at the start of exposure. Evaluation of the samples exposed in the EIS tests showed that the pits were much smaller, but more numerous for Al 5083 after exposure to 0.5 N NaCl. Nitric acid mass loss tests (NAMLT) according to ASTM G 67 indicated that the NC samples were not susceptible to intergranular corrosion. Observation with the SEM showed intergranular corrosion for the conventional.
URI
Go to Link
ISSN
0010-9312
Appears in Collections:
MSE_Journal Papers
Files in This Item:
2-s2.0-33645999427.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU