What to Do When There Is Green Powder on the Negative Terminal of a Car Battery?
1 Answers
Green powder on the negative terminal of a car battery occurs because the negative terminal gradually changes from pure lead to lead oxide during operation, resulting in the formation of green powder. Below are the relevant explanations: 1. Principle of Formation: When different metals come into contact, electrochemical reactions occur due to the diffusion of electrons, which is a normal chemical phenomenon. To prevent corrosion of the battery terminals, both the positive and negative terminals and the connectors are made of pure lead to minimize corrosion. Due to electron transfer during the battery's charging and discharging processes, over time, the negative terminal changes from pure lead to lead oxide, leading to the appearance of blue-green powder. 2. Solution: Remove the terminal, spray an alkaline cleaning agent on the lead terminal and wire connector, and wipe them clean. Use a wrench to tighten the wire connector onto the terminal. To avoid sparks, ensure all vehicle electronics and ignition are turned off before removing the battery terminals, and always remove the negative terminal first, followed by the positive terminal. When reinstalling the terminals, attach the positive terminal first, then the negative terminal.
