Vessel-Generated Ballast Water: Gray Water Investigation

Abstract

This report describes a study conducted to examine the feasibility of gray water ballasting on cruise ships andrelated corrosion issues. Mass loss and electrochemical corrosion experiments were performed on A36 steelcoupons with simulated gray water (treated and untreated), seawater, and mixtures of gray water and seawater.The seawater samples had a greater corrosion rate in grams per square meter per day (gm/m2/day) than the graywater samples, however, trends for the other types of gray/seawater mixtures differed between the two experimentalmethods. Corrosion rates for the electrochemical study were approximately 3-5 times greater than that for the massloss study, primarily because the electrochemical tests measured initial corrosion rates only, and the mass loss rateswere overall rates over 50 days.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2015
Accession Number
AD1006510

Entities

People

  • Blake Lassiter
  • Christian Von Stralendorff
  • Elijah Sponseller
  • Elizabeth Surgent
  • Ryan Buys
  • Salvatore Giampapa

Organizations

  • United States Coast Guard

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Biochemical Oxygen Demand
  • Cathodic Protection
  • Chemical Synthesis
  • Chemistry
  • Coast Guard
  • Construction
  • Corrosion
  • Corrosion Inhibition
  • Corrosion Resistance
  • Drops
  • Engineers
  • Environment
  • Environmental Protection
  • Materials
  • Microscopes
  • United States
  • United States Government

Readers

  • Electrochemical Surface Science
  • Marine Ecological Systems Migration
  • Oceanography.