SVP470

The HORIBA SVP470 is a scanning vibrating probe (SVP) system implementing the scanning vibrating electrode technique (SVET), which provides non-contact maps of local ionic current density flowing in the electrolyte solution above an electrochemically active or corroding sample surface. SVET works by vibrating a platinized platinum wire microelectrode in the electrolyte at two frequencies (x and z directions) and detecting the resulting AC voltage signal using lock-in amplification; the detected signal is proportional to the local potential gradient in the electrolyte, which reflects the underlying ionic current density and hence the local corrosion activity at that point on the sample surface. Positive current density regions (anodic sites) correspond to metal dissolution — where the metal is actively corroding and releasing ions — while negative regions (cathodic sites) correspond to oxygen reduction or hydrogen evolution where corrosion-sustaining reactions occur. SVET images make anodic and cathodic zones directly visible as a map, enabling corrosion scientists to identify which microstructural features (inclusions, grain boundaries, weld zones, coating defects) are acting as anodes versus cathodes in a galvanic corrosion couple. The technique is completely non-contact and non-destructive, allowing the same sample to be monitored over time as corrosion evolves. The SVP470 module mounts on the M470 workstation platform. NewRoad provides the HORIBA SVP470 in Israel for corrosion science, alloy characterization, galvanic corrosion studies, and coating failure analysis laboratories.