Where does galvanic collide?

In corrosion science, galvanic corrosion is the accelerated attack of the less-noble of two electrically connected dissimilar metals in an electrolyte, as the couple forms a cell in which one metal becomes the anode and dissolves. Florian Mansfeld analyzed how the anode-to-cathode area ratio governs the rate in Area Relationships in Galvanic Corrosion in Corrosion; the effect traces back to Luigi Galvani's eighteenth-century experiments on dissimilar-metal electricity. The referent is an electrochemical corrosion cell between coupled metals, not a change in the skin's electrical conductance.[1]

Unit

One galvanic couple, characterized by its coupling (galvanic) current

Recovery means

Couple two dissimilar metals in an electrolyte and observe preferential attack of the anode

Measured by

Measured as galvanic current (e.g., zero-resistance ammetry) and mass loss, scaled by area ratio

In psychophysiology, the galvanic skin response (electrodermal activity) is the change in the electrical conductance of the skin produced by sweat-gland activity under sympathetic arousal, widely used as an index of emotion and attention. Early work on the psychogalvanic reflex was reviewed by Herbert Woodrow in The psychogalvanic reflex in the Psychological Bulletin, and the modern field is codified in Wolfram Boucsein's Electrodermal Activity; the name again honours Galvani. The referent is a physiological signal measured on the skin, not the corrosion of coupled metals.[2][3]

Unit

One skin-conductance response, measured in microsiemens

Recovery means

Place electrodes on the fingers or palm and record conductance changes to a stimulus

Measured by

Measured as skin conductance level and phasic responses (microsiemens) via skin electrodes