Abstract
Commercially available brake pipes for motor vehicles were tested by using a Swing Panel Corrosion Tester, and the corrosion behavior at the wet zone (AA), dry zone (CC) and wet-dry zone (AC) of the brake pipe were estimated by measuring corrosion potentials and corrosion currents.
The Macro-cell was easily established between each zone of Zn plated brake pipe by“Swing” action, and corrosion was accelerated. In AA zone general corrosion occurred, but AC zone had a tendency of localized corrosion because of uneven wetness, NaCl solution was more corrosive than CaCl2 solution, but CaCl2 solution formed a macro-cell between A and C zone more easily than NaCl solution, causing easily the localized corrosion such as pitting.
