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Advancing and receding contact angle .
The aluminum plates were immersed in ethanol and then ultrasonically degreased for 10 min. The bottom half of the specimens (i.e., 20 mm × 20 mm area) was electrochemically polished in a 13.6 M acetic acid/2.56 M perchloric acid .
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(PDF) Advancing and receding contact angle investigations ...
a) SEM images of the surface of the specimen anodized in 0.3 M oxalic acid solution at 293 K and 50 V for 4 min and 60 min. (b) Changes in the advancing contact angle, q adv, .
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