A fabrication of iridium oxide film pH micro-sensor on Pt ultramicroelectrode and its application on in-situ pH distribution of 316L stainless steel corrosion at open circuit potential

Evolution and characterization of the film formed on super 13Cr stainless steel in CO2-saturated formation water at high temperature

“…A similar value of 10 -6 mol/L was reported by Zhao et al [19], who conducted the Pourbaix diagrams for super 13Cr at a lower temperature (90 o C -180 o C) after a long immersion time of 30 days. The thermodynamic data are used to generate the diagrams as provided in supplementary document in Table S1 Referring to the literature for an in-situ pH measurement on 316L stainless steel, it is well known that the pH of the bulk solution remained almost unchanged when the material is in the passive state, while the pH value at the material interface increases after prolonged immersion time [38]. Fig.…”

Potentiometric Sensing

“…The logarithmic selectivity coefficients were about -6 over Mg 2+ , Na + , and K + . The authors used the developed sensor to map the process of Ca 2+ leaching from bioactive glass.Zhu et al reported on an all solid-state pH microelectrode fabricated by anodic electrodeposition of an iridium oxide film onto a 10 µm platinum ultramicroelectrode 155. The sensor exhibited a response slope of 61 mV in a wide pH range and remained functional for at least 110 days.…”

Recent Advances in Scanning Electrochemical Microscopy for Biological Applications

“…In this mode, an ion-selective electrode (ISE) tip is typically used to detect the chemical systems of interest. Moreover, electrodes deposited with metal/metal oxide film are used in SECM for pH measurements, and serve as amperometric tips for distance control [ 37 ]. An ISE tip in an SECM measurement typically consists of an internal reference electrode and an ion-selective membrane ( Figure 2 h) [ 38 ].…”