Accession Number : ADA188048

Title :   Corrosion Performance of High Damping Alloys in 3.5% Sodium Chloride Environment.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Akhtar, Saleem

PDF Url : ADA188048

Report Date : Sep 1987

Pagination or Media Count : 113

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.

Descriptors :   *ALLOYS, *CORROSION, ALUMINUM, CHROMIUM, COPPER, COUPLING(INTERACTION), CURRENTS, DAMPING, ELECTRIC CURRENT, ELECTROCHEMISTRY, ELECTRON MICROSCOPY, ELECTRONIC SCANNERS, GALVANIC CORROSION, IRON, MANGANESE, MEASUREMENT, METALS, POLARIZATION, RATES, RESISTANCE, ZINC, SALT WATER, STAINLESS STEEL, CORROSION RESISTANT ALLOYS, SODIUM CHLORIDE, OCEAN ENVIRONMENTS, TEST METHODS, THESES, FRANCIUM COMPOUNDS, PITTING

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE