Polystyrene/TiO2 nanocomposite coating for strength and toughness enhancement of aluminum alloy 2024–T3 in accelerated stress corrosion cracking

The polystyrene/TiO2 nanocomposite coating is evaluated for reducing the susceptibility of aluminum alloy AA2024-T3 to stress corrosion cracking (SCC). The as-synthesized titania nanoparticles of aspect ratio (AR) 1, 2, and 4 are individually loaded at 25 wt% to the acetone-dissolved polystyrene (PS) to make the nanocomposites. Coated compact tension specimens are tested under accelerated SCC testing that combines the constant displacement rate...