隔膜を用いた中和反応による擬似さびの研究 (第2報)

口紙膜での反応

抄録

Studies have been carried out on the characteristics of “Pseudo-Rust” formed by the neutralization reaction between metallic chloride (FeCl₂, FeCl₃ and CuCl₂) and sodium hydroxide solutions placed on each side of analytical filter paper used as a diaphragm. The pseudo-rust precipitated at the filter paper-metallic solution interface in agreement with the previous result where an anion exchange membrane was employed. X-ray diffraction identified metallic iron and copper, their oxides, oxyhydroxides and hydroxides. The distribution of iron and copper after the reaction among pseudo-rust and the two solutions was obtained by chemical analysis, and the anion permeability through the rust was estimated by the sodium hydroxide consumption during the reaction. On the basis of these data, the protective effects of copper added to low-alloy steels were discussed.