Effect of radiolytic hydrogen peroxide in tritiated water on the first passivity of titanium

摘要: Abstract Titanium is an interesting metallic material for nuclear applications. This due to its passivity ensured by a compact and chemically stable oxide film that spontaneously covers the metal surface. work aims at studying electrochemical behavior of titanium in presence tritiated water pH 4 containing hydrogen peroxide generated radiolytic reaction. Tritium always causes difficulties corrosion. The corrosion potential can be either active or prepassive regions depending on concentration oxidizing species intermediate formed surface region. Therefore, was studied cyclic voltammetry noise situ provide indication mechanisms, transient formation instabilities In prepassivity passivity, according results impedance spectroscopy coulometric curves, protected semiconductor layer essentially TiO 2 . Between region first second consists dielectric layer. These two layers protect against