I-60 Influence of bath composition on aluminium corrosion in alkali carbonate melt [Text] / V. I. Sannikov, V. Y. Kudyakov, E. V. Nikitina, A. A. Pankratov // Corrosion. - 1994. - V.50, N 8. - P594-598. Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): SALT -- Al -- ALUMINIUM -- MELT ALKALI CARBONATE -- CORROSION OF ALUMINIUM -- CARBONATE -- BATH COMPOSITION -- Li -- LiAlO2 -- LITHIUM -- ALUMINATE LITHIUM -- Na2O2 -- OXIDE SODIUM -- NaCl -- CHLORIDE SODIUM -- CHLORIDE IONS -- FILM FORMATION -- PASSIVATION -- POTENTIOSTATIC -- SODIUM -- METAL ALKALI Аннотация: The influence of sodium (Na) additions with different chemical natures (sodium peroxide Na2O2 and sodium chloride NaCl on the mechanism and kinetics of aluminum Al corrosion was investigated. Auger electron spectroscopy, x-ray photoelectron spectroscopy, and x-ray structure spectroscopy were used to analyze the corrosion products. Na2O2 promoted formation of more compact, less defective films. At high temperature, the introduction of peroxide into the salt phase resulted in the emergence of different oxigen (O) ions and a film with higher O content NaCl additions destroyed the coating through formation of pits and local solutions of oxide layers. The greater the concentration of active ions was, the less the initial depassivation potential was. Increases in anodic polarization and concentrations of chloride ions (Cl-) diminished induction time. Films consisted only of alpha-LiAlO2, a crystal modification of lithium aluminate |