Electrode-Electrolyte Interactions Magnesium Anodes: meta-Dinitrobenzene Cathodes
Abstract
The electrochemical dissolution of magnesium (AZ-21) and the h.e.r. on magnesium (AZ-21) in magnesium perchlorate, sodium perchlorate and a mixed electrolyte of sodium and magnesium perchlorate has been investigated. In the sodium perchlorate electrolyte, 0.4M to 4.0M, the Tafel Slope of the h.e.r. was unaffected by the direction of the potential sweep. In the magnesium perchlorate electrolyte, 0.2M to 2.0M, the Tafel Slope of the h.e.r. changes with direction of the potential sweep. The anodic Tafel Slopes in the pure electrolytes was 50 mv and 30 mv in the mixed electrolytes. The rate of magnesium dissolution in the magnesium perchlorate was about an order of magnitude faster than that in the sodium perchlorate electrolyte. On the other hand the corrosion current density of magnesium in the magnesium perchlorate was three orders of magnitude greater than in the sodium perchlorate electrolyte. Corrosion rates of magnesium in magnesium perchlorate and magnesium perchlorate saturated with magnesium hydroxide was also investigated. It was found that addition of the hydroxide reduced the corrosion rate by about 50%. It was also determined that magnesium did not exhibit the Negative Difference Affect.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1969
- Accession Number
- AD0865587
Entities
People
- Akim Adubifa
- Gerald Smaldone
- Gideon Stern
- Leonard L. Wikstrom
Organizations
- New York University