What substance is used to fill the outer splice to prevent oxidation?

Zinc chromate is utilized in various applications, particularly in metal protection, due to its effective rust-inhibiting properties. When filling the outer splice of electrical connections, the primary concern is often oxidation, which can compromise the electrical integrity and performance over time. Zinc chromate forms a protective barrier that hinders moisture and air from reaching the metal surface, thereby preventing oxidation. This makes it a suitable choice for ensuring longevity and reliability in connections, particularly in outdoor or harsh environments where exposure to elements is prevalent.

Other substances, while they may serve different roles in different contexts, do not specifically target oxidation prevention in the same effective manner as zinc chromate does in this application.