Corrosion behavior of pure titanium in H₂SO₄, HCl and HNO₃ with different concentrations of F^- was studied with electrochemical testing and morphology observation. The threshold F^- concentration triggering severe corrosion is between 0.0005 and 0.001 M in the three acids. The F^- promotes anodic dissolution and inhibits oxygen reduction, resulting in the decrease of cathodic current density. The corrosion process presents a two-step reaction mechanism, and the influence mechanism of fluoride in different acids is different. The oxidizing nitrate participates in the corrosion reaction as an oxidant and accelerates the corrosion, resulting in the most severe corrosion in fluoride-bearing HNO₃.

通过电化学测试和形貌观察研究了纯钛在不同浓度F ^{- 的}H ₂ SO ₄、HCl和HNO _{3 中的}腐蚀行为。在三种酸中，触发严重腐蚀的阈值 F ^-浓度介于 0.0005 和 0.001 M 之间。在F ^-促进阳极溶解，抑制氧还原，导致阴极电流密度降低。腐蚀过程呈现两步反应机理，氟化物在不同酸中的影响机理不同。氧化性硝酸盐作为氧化剂参与腐蚀反应并加速腐蚀，导致含氟HNO ₃腐蚀最严重。