What is the color of the second coat of primer applied to ships?

The correct answer is that the color of the second coat of primer applied to ships is typically aluminum. This is because aluminum primers are often used for metal surfaces to prevent corrosion and improve the adhesion of subsequent paint layers. The reflective quality of the aluminum pigment can also contribute to temperature regulation on the ship's surface, which helps in maintaining the integrity of the materials beneath. Additionally, aluminum primers provide a robust protective barrier against harsh marine environments, which is crucial for the durability of ships.

While other colors like grey may be used for certain applications or specific types of primers, aluminum is particularly favored in marine applications due to its corrosion resistance and effectiveness. The choice of primer color can also assist in visual inspection, allowing for easier identification of coverage areas during application.