RESEARCHES ON THE ELECTRO-CHEMICAL PROPERTIES OF Al-Mg ALLOYS (Part 2)
ESPECIALLY ABOUT THOSE OF 52S ALLOYS
1953 Volume 1953 Issue 7 Pages 51-54
Details
1953 Volume 1953 Issue 7 Pages 51-54
In the first report, one of the authors, H. Harimoto reported the electro-chemical properties of Al-Mg alloys. (Light metals No. 3, 1952-V) We measured the electro-solutional pressure of samples, various contents of Mg in Al, by new designed vaccum-tube potentiometer. Then researched the relation between the electro-solutional pressure and the quantity of corrosion.
We studied the electro-chemical properties of 52S alloys and reported the following results in this paper. Samples, Mg 2.5% in Al, were heated at 100°, 200°, 300°, 400°, 500°, 550°C. After treatment, the samples (cathode) and Pt (anode) were dipped in the electrolytes of 3%NaCl and 0.1%HCl, respectively. Then the intensity of current were measured by milliammeter and oscillograph.
Similarly we measured about reduction 40%, 70%, 90% of the same samples respectively. More these samples, immediately after polishing, after one week, after four weeks, were measured.
Conclusion
In an instant of dipping electrode, the intensity of current rose up and indicated max. Value after 0.1 x several seconds. Then inclined to decrease for a short time and at last became in the equilibrium states.
We considered that those results were due to the polarization.
