Bogojavlenskaja E. The aluminum alloys oxidation in alkaline solutions perfection by microarc technology

Electrochemical processes in the electrode layer and boundary interfaces during the oxide coatings forming on aluminum alloys. Perfection of the aluminum alloys oxidation technology to increase corrosion resistance, abrasive wear and activity in the neutralization of gas emissions reactions. Physical-chemical and electrochemical methods are used. The principles of the electrolyte components choose, selection on the alloy composition are grounded. The dependense of the of oxide coating composition, morphology, thickness on the technologi parameters is determinateand electrolytes and of microarc oxidation modes are developed. The relation between the oxide coatings composition and their functional properties is determined. It was determined that due to the wate thermolysis of r, the manganate ions intramolecular transformation are mixed oxides coating forming occur during microarc oxidation of aluminum alloys in manganates solutions. The copper complexes formation and their removal occur as a result of intermetallic compounds dissolution and lead to the uniform coatings of aluminum oxide forming in diphosphate solutions. Aluminum alloys microarc oxidation technology, which provides coatings with high corrosion stability and wear resistance is worked out. Mixed aluminum and manganate oxide coating on aluminum alloys are characterized by low temperature of hydrocarbons oxidation are designed. The effectiveness of the proposed technologies is confirmed by the positive results of synthesized coatings in laboratory and industrial studies on corrosion resistance and their utilization in ecological friendly technologies. Sphere of application: corrosion protection, gaseous emissions neutralization.