Self-lubricative Coatings Deposited by Micro-plasma Oxidation on 7075-T6 Aluminum Alloys in the Solution of Aluminate/Molybdenum Disulfide

摘要

The corrosion- and wear-resistant coatings on 7075-T6 aluminum alloy were prepared using micro-plasma oxidation in aqueous electrolytic solution with different amounts of solid M0S_2 powder of 2μm. The bipolar rectangular pulse with a frequency of lOOOHz potentiostatically and galvanostatically is used in this work. The results indicate that the corrosion resistance and wear resistance can be further improved by the addition of MOS_2 powders in solution. The optimal amount of solid M0S_2 powder in electrolytic solution (2g/L) will substantially enhance the corrosion resistance, increase the hardness of MAO coatings and improve the wear resistance, irrespective of potentiostatic and galvanostatic power supply.