What is used to prime ferrous metal?

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Study for the California C-33 License Exam with comprehensive questions and detailed explanations. Prepare for success with our targeted practice quizzes and enhance your understanding of painting and decorating contractor requirements.

Multiple Choice

What is used to prime ferrous metal?

Explanation:
Priming ferrous metal calls for a rust-inhibiting primer that bonds well to bare steel. Red lead (lead tetroxide) has been traditionally used because it forms a protective, adherent film that slows rust and provides a good base for the topcoat to grab onto. It acts as a durable barrier on iron and steel, which is why it’s chosen for primers on ferrous surfaces. Litharge is mainly a drying agent in drying oil paints rather than a protective primer for metal. Fisheye is the defect caused by contamination, not a primer material. Special thinner is simply a solvent and cannot prime. So red lead is the best answer.

Priming ferrous metal calls for a rust-inhibiting primer that bonds well to bare steel. Red lead (lead tetroxide) has been traditionally used because it forms a protective, adherent film that slows rust and provides a good base for the topcoat to grab onto. It acts as a durable barrier on iron and steel, which is why it’s chosen for primers on ferrous surfaces. Litharge is mainly a drying agent in drying oil paints rather than a protective primer for metal. Fisheye is the defect caused by contamination, not a primer material. Special thinner is simply a solvent and cannot prime. So red lead is the best answer.

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