Corrosion In Aviation Practice Test 2026 - Free Corrosion Aviation Exam Practice Questions and Study Guide

The key idea is how electrochemical attack works: the anode dissolves as metal ions, releasing material into the electrolyte. Because the circuit connects the two electrodes, those dissolved species can reach the cathode. At the cathode, electrons are available to reduce species, so some of the metal ions shed from the anode are reduced and deposited there, meaning the shed material is partially accepted by the cathode. This on-cathode reduction and deposition happens only part of the time and under the right conditions, so only a portion of the shed material ends up being deposited, with the rest remaining in solution or forming other species.