What is the purpose of brushing the aluminum conductor surface before applying an inhibitor-type compound?

Brushing the aluminum conductor surface before applying an inhibitor-type compound is primarily intended to enhance the effectiveness of the inhibitor. When you clean the surface by brushing, you remove any oxidation, dirt, or contaminants that may hinder the bond between the aluminum and the inhibitor. This preparation helps ensure that the inhibitor can effectively adhere to the aluminum surface, allowing it to perform its role in preventing corrosion and maintaining conductivity.

While achieving a bright finish may be a minor benefit of brushing, the main goal is to prepare the surface for optimal interaction with the inhibitor. This preparation is crucial because any residue left on the surface can lead to inadequate protection against environmental factors that cause corrosion. Therefore, the correct answer relates to the practical purpose of enhancing the effectiveness of the protection rather than merely achieving a cosmetic appearance.