Will the white primer exposed on a black car rust?

[RileyDella]

Black cars exposing white primer will not rust. Knowledge about car rust is as follows: 1. Introduction: Rust is a chemical reaction that occurs when iron is left for a long time. Iron is prone to rust, not only due to its active chemical properties but also largely related to external conditions. Moisture is one of the substances that make iron prone to rust. 2. Principle: Water alone will not cause iron to rust. Only when oxygen in the air dissolves in water, and the oxygen reacts with iron in a watery environment, does it produce a substance called iron oxide, which is rust. Rust is a reddish-brown substance, not as hard as iron, and easily flakes off. When a piece of iron completely rusts, its volume can expand up to 8 times. If rust is not removed, this spongy rust is particularly prone to absorbing moisture, causing the iron to deteriorate faster.