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Why the profile of etched titanium with HF-HNO3 looks like a hill, while the profile of etched titanium with HCl is U-shaped? Can you please put your source if you know it? Thank you

Note: the picture above is the profile of etched titanium with HF


closed as unclear what you're asking by Waylander, Jon Custer, A.K., aventurin, Mithoron Jul 5 '18 at 15:59

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  • $\begingroup$ What are your thoughts on this? $\endgroup$ – Waylander Jul 4 '18 at 15:53
  • $\begingroup$ Really unclear what you are asking. Have you considered the sample curvature before etching? The picture above shows it quite clearly. $\endgroup$ – Jon Custer Jul 4 '18 at 16:25