General Contractor Practice Exam

What type of paint is known to inhibit rust on steel?

1. Blue lead paint

2. Red lead paint

3. White lead paint

4. Black lead paint

The correct answer is: Red lead paint

Red lead paint is known for its rust-inhibiting properties on steel surfaces. Red lead is a type of pigment that contains lead oxide, which forms a protective barrier that helps prevent corrosion and rust when applied to metal. This makes it particularly effective in various industrial applications, especially for steel structures. The use of red lead paint is common in environments where metal is exposed to moisture and harsh conditions, as it significantly extends the life of the steel by preventing oxidation. It creates a stable surface for additional paint layers and enhances the overall durability of the coating system. The other types of lead paint mentioned do not share the same effectiveness in inhibiting rust. Blue, white, and black lead paints lack the specific chemical properties that provide the anti-corrosive benefits found in red lead paint. Therefore, red lead paint is the appropriate choice when looking for a paint that specifically inhibits rust on steel.