A SCANNING ELECTRON MICROSCOPE STUDY OF THE CORROSION OF SACRIFICIAL HULL ANODES UNDER SIMULATED SHIP SERVICE CONDITIONS

The behavior of ship hull sacrificial anode zinc was studied under simulated shipboard exposure conditions. The adherence and passivating tendencies of anodic corrosion products are discussed in relation to time and corrosion product layer thickness. The effects of velocity and time of dynamic exposure on zinc anode specimens pre-exposed statically are presented. The behavior of zinc corrosion products is related to laminar and turbulent regimes of electrolyte flow as well as ionic diffusion. The depassivating tendencies of zinc anode corrosion products are presented. The corrosion of an aluminum sacrificial anode is characterized, and the observed widespread pitting corrosion is hypothesized to be anti-intergranular in nature. (Author)

• Corporate Authors:

  Naval Postgraduate School

  1 University Circle
  Monterey, CA  United States  93943
• Authors:
  • Wright, P W
• Publication Date: 1976-12

Media Info

• Pagination: 153 p.

Subject/Index Terms

• TRT Terms: Aluminum; Anodic protection; Anticorrosion coatings; Cathodic protection; Corrosion; Corrosion protection; Diffusion (Optics); Electron microscopy; Hulls; Pitting; Protective coatings; Sacrificial anodes; Simulation; Theses; Zinc
• Uncontrolled Terms: Ship hulls
• Old TRIS Terms: Anodic coatings
• Subject Areas: Construction; Data and Information Technology; Marine Transportation;

Filing Info

• Accession Number: 00159061
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: MS Thesis
• Files: TRIS
• Created Date: Aug 31 1977 12:00AM