Abstract
The elemental composition of characteristic formations on the surface of anodic films containing transition metal compounds (Ni, Cu, Co, Mn, and W) and formed on an aluminum alloy in aqueous electrolytes under the conditions of the action of electric spark and arc discharges (plasma-electrolytic or plasmaelectrochemical oxidation) was studied. The main formations on the surface were fritted structures, pores, caverns covered by “lids” on top, and disperse particles (microgranules). Electrolyte transition metals largely concentrated in caverns, pores, and microgranules. The composition of microgranules was different from that of caverns, pores, and fritted structures. The main elements that formed microgranules were nickel and carbon. Cobalt and manganese were differently built into surface formations. Cobalt replaced nickel in micro-granules, and manganese replaced aluminum in fritted surface structures.
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