in the past and information concerning this matter is available in
literature.
Most studies have considered the (micro)hardness or wear
resistance of porous AAF concern oxides formed under hard
anodizing conditions. These conditions, which comprise the use
of low electrolyte temperatures and often special electrolytes,
are used to produce thick anodic oxides (typically thicker than
25 μm) with hardness and wear resistance as their primary
characteristics [1]. Yet even in this field not much work has been
conducted to relate the latter two properties to the electrolyte
temperature [1]. According to Scott [2], who considered
anodizing in a sulphuric acid electrolyte at a constant applied
current density of 4 A/dm2
, varying the electrolyte temperature
in the range from −5 °C up to 15 °C hardly influences the