Effect Of Anodic Oxidation Research Articles

The effect of anodic oxidation on near-surface deuterium in Zr-2.5 wt.% Nb

The effect of anodic oxidation on near-surface deuterium in thin ( ∼ 3.5 μm) foils of Zr-2.5 wt.% Nb has been studied with the 2D(3He, p)4 He nuclear reaction. To introduce deuterium into the foil, the native oxide was etched with a solution of 0.1% NH4HF2 in D2O. The foils were anodized, in a compact cell in a vacuum chamber, to oxide thicknesses of 160, 200 and 280 nm and the remaining D concentration measured. The D content was also measured, in separate experiments, with the anodized surface towards the beam. Detailed analysis shows that the effect of oxidation is to return most of the D in the anodized region to the solution.

Influence of anodic oxidation on selected parameters in recycled fish culture water

The effect of anodic oxidation on concentrations of ammonia, nitrite, nitrate, amino acids and yellow substances and on chemical oxygen demand was investigated on a laboratory scale using recycled fish culture water or solutions freshly prepared from distilled water. A distinct decrease in the concentrations of all these compounds during the anodic oxidation treatment could be demonstrated. From the results, we conclude that anodic oxidation might be useful for the treatment of fish culture water. Further studies on additional organic and inorganic compounds as well as pathogens in freshwater would be desirable.

クロムメッキにおける酸化皮膜の影響について

The effects of dipping time in chromium plating bath before the electroplating and of anodic oxidation by bipolarization during the plating were investigated. The following results were obtained: (1) When the dipping time was long or the sample was subjected to anodic oxidation in the chromium plating bath, an oxide film was formed on the nickel plating surface; then, the deposition range of chromium plating became narrower, which made it difficult to get an excellent bright chromium plating. (2) The effects of anodic oxidation were greater when the temperature of plating bath was higher and they were nearly proportional to the oxidation time; then, the deposition range of chromium plating became narrower, which finally led to very little deposits. (3) The effects of anodic oxidation were greater in Sargent bath than in hydrofluosilicic acid bath.