The white powder forms first as anhydrous copper sulfate or lead sulfate. On exposure to environmental moisture, the white anhydrous copper sulfate turns into a blue hydrated copper sulfate. On the other hand, blue powder may form if the battery is exposed to a moist environment. Thus, the chemical reaction is. Accumulating the blue powder has negative impacts and needs to be removed without damaging the terminals. Below are some simple. You can perform the following maintenance practices to prevent your battery terminals from corroding. The blue powder forms on the terminals inhibiting the normal functioning of the battery. Below are some of the negative impacts of the powder. 1. Have you noticed different colors on your battery terminals? No need to worry; some of these color changes occur due to varying stages of chemical reactions. Initially, you may only notice white powder and later find a blue.