Details

Autor(en) / Beteiligte

• Yan, Zhou-Zhou
• Zhang, Qin-Hao
• Cai, Hao-Ran
• Li, Xin-Ran
• Wu, Lian-Kui
• Luo, Zhuang-Zhu
• Cao, Fa-He

Titel

Study on the galvanic corrosion of titanium and stainless steel couple with the synergistic effect of proton and fluoride ion

Ist Teil von

• Corrosion science, 2022-09, Vol.206, p.110541, Article 110541

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The galvanic corrosion of titanium/304 stainless steel (TA1/304SS) couple was investigated in neutral and acidic solution with and without fluorine ion (F-) using macro-electrochemical technique and scanning electrochemical microscope (SECM). The results show that the synergistic effect of H+ and F- affects the passive film on the surface of galvanic couple, resulting in a great change in heterogeneous reaction rate constant and surface electrochemical activity characterized by approach curve and surface mapping of SECM in feedback mode. In addition, a typical polarity reversal occurs in pH = 2.0 acidic solution with adding F- which the TA1 is anodic to 304SS. [Display omitted] •Direct measuring the surface reactivity differences of passive film on TA1 and 304SS using multiscale electrochemical techniques.•The corrosion of TA1 is more serious than that of 304SS due to the synergistic effect of H+ and F- to the passive film.•A typical polarity reversal in the TA1/304SS couple was found after adding F- in pH = 2.0 acid solution.