Corrosion Performance of High Damping Alloys in 3.5% Sodium Chloride Environment.
Abstract
The electrochemical nature of corrosion provides a means of determining an almost instantaneous corrosion rate. Corrosion rate and the nature of corrosion attack were investigated for several high damping alloys based on the copper manganese, iron chromium aluminum, iron chromium molybdenum, and copper zinc systems in 3.5% NaC1 solution. The results of Potentiodynamic polarization and polarization resistance measurements were compared with the results of actual sea exposures. A zero resistance ammeter technique was used to measure the galvanic currents between galvanically coupled metals. The magnitude of the galvanic current provide an indication of the severity of galvanic corrosion which occurs in a 3.5% NaC1 environment. Scanning electron microscopy (SEM) was used to determine the nature of corrosion attack and the extent of film formation on the surface of each corroding alloy. Keywords: Corrosion, High damping alloys, Electrochemical technique, Sea exposure, Scanning electron microscopy.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1987
- Accession Number
- ADA188048
Entities
People
- Saleem Akhtar
Organizations
- Naval Postgraduate School