Understanding and Laboratory Prediction of the Atmospheric Corrosion behavior of Steels and of Non-Ferrous Metals and Alloys.
Abstract
The work during the second semi-annual period was essentially devoted to aluminum alloys. Accelerated tests were performed on Al-Mn, Al-Cu-Mg, Al-Zn-Cu-Mg and on 7075-T73 clad with Al-Zn, in a typical marine simulated atmosphere and in a typical industrial simulated atmosphere. The results were obtained as electrode potentials during wet periods versus time, weight loss and corrosion penetration versus time and corrosion morphology. The results were analyzed to see if there is a relationship between the values of the electrode potentials and the type and magnitude of corrosion during the accelerated test on hand, and for a comparison between the results of the accelerated tests and known behaviors of these materials in well defined natural exposure conditions, on another hand. It is hoped that, as a result of this, characteristic atmospheric condition can be simulated by accelerated laboratory tests and that these laboratory tests can provide indications on the type of corrosion and the corrosion magnitude in these natural conditions, and will allow a quick selection of materials for given exposure conditions. Limited series of electrode potentials measurements were made on samples exposed to natural conditions, in an attempt to improve our understanding of the correlation between accelerated and natural tests.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1984
- Accession Number
- ADA154642
Entities
People
- M. Pourbaix