Combined Corrosion and Wear of Aluminium Alloy 7075-T6

Abstract

The aluminium alloy 7075-T6 is widely used in engineering. In some applications, like slurry transport, corrosion and abrasion occur simultaneously, resulting in early material failure. In the present work, we investigated the combined effect of corrosion and wear on the aluminium alloy 7075-T6. We performed two series of wear experiments to vary the conditions and severity of corrosion environment: chemically by using ethanol, deionized water and seawater, and electrochemically by applying various potentials using a potentiostat in seawater. Results show that, in seawater, the wear rate was higher than in deionized and ethanol; and in the potentiostat experiments, at the anodic potentials, the wear rates were higher than at the open circuit potential and the cathodic potentials. Seawater is the most corrosive one among the three liquids and the corrosion products can be easily removed. When applying anodic potentials, corrosion is accelerated, and the higher wear rate confirms that higher corrosion rate leads to higher wear rate due to the formation and removal of corrosion products during tribocorrosion.

Additive Friction Stir-Enabled Solid-State Additive Manufacturing for the Repair of 7075 Aluminum Alloy

“…High strength aluminum alloy components are widely used in aircraft, sporting equipment, and other safety-critical applications [1,2]. With corrosion, wear, or impact damages, these components need to either be replaced-which is expensive, time consuming, and inefficient-or repaired [3]. For repair, fusion welding has proved highly successful for a broad range of metals.…”

Effect of electrochemical potential on the corrosive wear behavior of 5052 aluminum alloy in 0.5 M NaCl solution

“…16 Janssen studied the corrosive wear of the Al-Zn-Mg aluminum alloy in seawater. 17 The results show that the total volume loss is higher at the anodic domain than at the OCP and cathodic one. Panagopoulos investigated the corrosive wear of Al-Mg-Si aluminum alloy in 0.01 M NaCl solution.…”

“…Vieira established a simple galvanic coupling model to calculate the evolution of the open circuit potential (OCP) of Al‐Si alloys in 0.05 M NaCl and 0.1 M NaNO3 solutions . Janssen studied the corrosive wear of the Al‐Zn‐Mg aluminum alloy in seawater . The results show that the total volume loss is higher at the anodic domain than at the OCP and cathodic one.…”

The effect of retrogression and re‐aging treatment on mechanical and tribological features of AA7075 aluminium alloy

“…On the other hand, aluminium alloys have poor wear resistance due to their low hardness. This feature limits the engineering applications of aluminium alloys [15][16][17]. Although the effects of various surface treatments on wear behavior of AA7075 have been investigated, the effects of retrogression and re-aging process on wear behavior have not been examined in detail yet.…”