Abstract
7075 Al alloy was PEO-treated in a silicate based electrolyte containing 3 g l-1 potassium titanyl oxalate using unipolar and bipolar pulsed current waveforms. The coating formed by the bipolar waveform with the wider cathodic pulses showed volcano-like surface morphology with no evidence of large pores at the metal/coating interface. It revealed the highest corrosion performance due to the synergistic effect of TiO2 incorporation and structural/morphological features along with a better passivation behavior indicating no pitting susceptibility. For this coating, the tribocorrosion tests showed no potential drop during sliding under 1 N with the lowest volume loss of 0.022 mm3.
Original language | English |
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Pages (from-to) | 314-328 |
Number of pages | 15 |
Journal | Corrosion Science |
Volume | 143 |
Publication status | Published - 2018 |
All Science Journal Classification (ASJC) codes
- General Chemistry
- General Chemical Engineering
- General Materials Science