An Evaluation of Carbon Steel Corrosion Under Stagnant Seawater Conditions
Abstract
Corrosion, of 1020 carbon steel coupons in, natural seawater over a six-month period was more aggressive under stagnant anaerobic conditions than stagnant aerobic conditions as measured by weight loss and instantaneous corrosion rate (polarization resistance) tinder oxygenated conditions, a two-tiered oxide layer. formed. The outer oxide layer was reddish-brown and contained numerous filamentous bacteria. The inner oxide was extreme tenacious and resistant to acid-cleaning . Under anaerobic conditions, a non-tenacious sulfur-rich corrosion product wub enmeshed bacteria formed on carbon steel surfaces. In both aerobic and anaerobic exposures, corrosion was more aggressive on horizontally oriented coupons compared to vertically oriented samples. Bulk water chemistry and microbial populations were measured as a function of rime. Despite the stagnant conditions, both were dynamic.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2004
- Accession Number
- ADA423448
Entities
People
- Brenda J. Little
- Edward J. Lemeiux
- Jason S. Lee
- Richard I. Ray
Organizations
- United States Naval Research Laboratory