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Anodic behaviour of titanium in acidic chloride containing media (HClNaCl). Influence of the constituents of the medium—II. Calculation of the partial reaction orders

✍ Scribed by J.P. Frayret; A. Caprani

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
554 KB
Volume
26
Category
Article
ISSN
0013-4686

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✦ Synopsis

Analyzing the stationary current-potentialcurves with an original simplified reaction scheme of the dissolution-passivation of titanium, we have determined the partial reaction orders of the elementary rate determining steps of the mechanism. The discussion of a negative order with respect to H + ions observed for the passivation electrochemical reaction leads to propose a modified reaction scheme including two passivation paths, one of the two implying the tetravalent oxide TiO,, responsible of the stable passivity.

📜 SIMILAR VOLUMES

Anodic behaviour of titanium in acidic c
Anodic behaviour of titanium in acidic chloride containing media (HClNaCl). Influence of the constituents of the medium—I. Study of the stationary current. Calculation of the overall reaction orders
✍ J.P. Frayret; R. Pointeau; A. Caprani 📂 Article 📅 1981 🏛 Elsevier Science 🌐 English ⚖ 572 KB

In concentrated bvdrochloric acid solutions. the overall dissolution rate depends on the acid concentration. Using mixed electrolytes (HCI-NaCl) we have established the infhwnce on-the overall anodic stationary current, of each of the H+ and Cl-ions. Considering the logarithmic derivative of the ove

Anodic behaviour of titanium in acidic c
Anodic behaviour of titanium in acidic chloride containing media (HCl  NaCl). Influence of the constituents of the medium—III. Analysis of the electrochemical impedance. General dissolution — passivation mechanism
✍ J.P. Frayret; A. Caprani 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 785 KB

~-AMl3Magtkdcotrockguodtmpedarrcs d~~ploctadinsLorpfrequarcy~(lO-'Hz-1~ m) cna#cr to anapkte and support tbe dlssolution-passivatlon scheme of titanium elaborated from stauiy state mts. ~PILP1YdlOttlieR,.Z~(~~tranrfsrrasistmaby~tiaury cWalt~-theplwalceof two active disduti~ paths in terratent titani