Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1470861 | Corrosion Science | 2009 | 5 Pages |
Abstract
MgO-electrodes were polarised at voltages of up to 10 V in a synthetic lime–alumina–silicate slag at 1400 °C. Cathodic corrosion protection was obtained at voltages ⩾8 V, whereas anodic decay was accelerated manifold. The protective effect was mainly achieved by electrostatic alteration of the slag composition at the electrode boundary. This was primarily caused by the rapid migration of mobile Ca2+-ions and their accumulation at the slag/electrode interface. Consequently, the saturation concentration of CaO in the melt was reached and the precipitation of the CaO-containing phases merwinite, melilite and dicalciumsilicate occurred.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
R.K. Sauerbrey, G. Mori, Ch. Majcenovic, H. Harmuth,