Nucleation and Growth of Anodic Electrocrystallized Products on Ship Hull Zinc in Salt Water Solutions

Abstract

The structure of corrosion products formed on a zinc alloy with and without a steel couple and exposed in various salt water electrolytes was studied as a function of time. A film growth mechanism is hypothesized involving nucleation of ZnO platelets in a near-surface electrolyte layer adjacent to anodic areas. Inclusion areas on the zinc surface are lead-rich corrosion product initiation points, and a passivating film tends to form over these areas. Hexagonal ZnO platelets are the primary corrosion product with secondary products categorized and presented. X-ray diffraction powder patterns suggest a ZnCO3 product and a ZnCl2 complex product in the base film.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1975
Accession Number
ADA021762

Entities

People

  • James M. Todd

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Cathodic Protection
  • Chemical Reactions
  • Chemical Synthesis
  • Chemistry
  • Corrosion
  • Corrosion Inhibition
  • Crystal Structure
  • Electrochemical Reactions
  • Electrodes
  • Electron Microscopes
  • Hydrogen
  • Materials
  • Microscopes
  • Salt Water
  • Scanning Electron Microscopes
  • Sea Water
  • Spectra

Fields of Study

  • Materials science

Readers

  • Combustion science or combustion engineering.
  • Materials Science and Engineering.
  • Surface Engineering/Surface Coating Technology.