What is the Function of Automotive Primer?

1 Answers
DelHeidi
07/28/25 6:00pm
Automotive primer serves to prevent metal surface oxidation that leads to corrosion, while also enhancing adhesion between the metal surface and intermediate coatings, topcoats, putty, etc. Primer, also known as base coat paint, can generally be applied directly onto the object's surface or putty surface. Below is relevant information about automotive primer: 1. Automotive primer refers to the first layer of coating directly applied onto the surface-treated auto parts, marking the beginning of the entire coating system. It is designed to have excellent adhesion with the substrate, good compatibility with intermediate or topcoats applied above, and must possess outstanding anti-corrosion, anti-rust, oil resistance, chemical resistance, and water resistance properties. 2. With the rapid development of the automotive industry, requirements for automotive primers have become increasingly stringent. Higher-end vehicles, especially passenger cars, typically use cathodic electrodeposition primers. After over 20 years of development and the introduction of advanced technologies and processes, cathodic electrodeposition primers can now fully meet all required mechanical properties, coating compatibility (particularly with modern assembly-line painting processes), and have become nearly universally adopted for passenger car primers.
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