Corrosion protection assessment of sacrificial coating systems as a function of exposure time in a marine environment

D. P. Schmidt, Barbara Shaw, E. Sikora, W. W. Shaw, L. H. Laliberte

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The present investigation assessed the corrosion protection performance of 17 different Zn and Al sacrificial coating system configurations during marine atmospheric exposure at Kure Beach, NC. The coating systems incorporated several conversion coating layers, primers and organic topcoats. Visual observations and electrochemical measurements (including electrochemical impedance spectroscopy, EIS) were made on six different occasions throughout the 20-month exposure time. Milled scribes on each of the coating specimens allowed for defect protection as well as barrier protection to be investigated. A novel corrosion analysis technique utilizing a specialized conducting agar (SCAR) cell enabled impedance measurements to be made on both intact and defect areas. Visual observations, Eoc's, and EIS as a function of atmospheric exposure time provided complementary results. Impedance results were found to be useful in determining a coating's barrier protection and scribe damage analysis accurately represented defect protection.

Original languageEnglish (US)
Pages (from-to)352-364
Number of pages13
JournalProgress in Organic Coatings
Volume57
Issue number4
DOIs
StatePublished - Dec 1 2006

Fingerprint

Corrosion protection
Coatings
Electrochemical impedance spectroscopy
Defects
Beaches
Agar
Corrosion

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Surfaces, Coatings and Films
  • Organic Chemistry
  • Materials Chemistry

Cite this

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abstract = "The present investigation assessed the corrosion protection performance of 17 different Zn and Al sacrificial coating system configurations during marine atmospheric exposure at Kure Beach, NC. The coating systems incorporated several conversion coating layers, primers and organic topcoats. Visual observations and electrochemical measurements (including electrochemical impedance spectroscopy, EIS) were made on six different occasions throughout the 20-month exposure time. Milled scribes on each of the coating specimens allowed for defect protection as well as barrier protection to be investigated. A novel corrosion analysis technique utilizing a specialized conducting agar (SCAR) cell enabled impedance measurements to be made on both intact and defect areas. Visual observations, Eoc's, and EIS as a function of atmospheric exposure time provided complementary results. Impedance results were found to be useful in determining a coating's barrier protection and scribe damage analysis accurately represented defect protection.",
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Corrosion protection assessment of sacrificial coating systems as a function of exposure time in a marine environment. / Schmidt, D. P.; Shaw, Barbara; Sikora, E.; Shaw, W. W.; Laliberte, L. H.

In: Progress in Organic Coatings, Vol. 57, No. 4, 01.12.2006, p. 352-364.

Research output: Contribution to journalArticle

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