By serving as an electrolyte and making electrochemical reactions easier on metal surfaces, moisture speeds up corrosion. Moisture can dissolve oxygen and other impurities, making a space where different parts of a metal or metals that are linked to each other can act as anodes and cathodes. This difference makes an electrochemical cell. At the anode, the metal loses electrons and rusts. The presence of water not only makes these processes possible, but it also helps move the ions that speed up the corrosion process. In other words, the conditions needed for the electrochemical processes that cause corrosion are much less favorable without water. This makes the rate of corrosion much slower.