Effect of Graphite Content on the Conductivity, Wear Behavior, and Corrosion Resistance of the Organic Layer on Magnesium Alloy MAO Coatings

To impart electrical conductivity on magnesium alloy micro-arc oxidation coatings, a graphite/epoxy conductive layer was prepared the surface of ceramic in this work, focusing wear behavior and corrosion resistance coating. At graphite weight 80 wt%, square coating decreased to 217.6 kΩ/□, it exhibited good resistance. Combined with distribution particles change resistance, we determined that mechanism occurred through quantum tunneling when content 60 wt%. When increased from 100 formation paths further improved conductivity. The hardness organic coatings positively related content. Analysis scars debris after dry friction testing showed forms consisted abrasive range 20–40 60–100 peeling wear.