What are the causes of car body rusting?

1 Answers
BrooklynLynn
07/29/25 2:08pm
The causes of car body rusting are: 1. Uneven road surfaces causing body vibrations; 2. Vibration from engine operation leading to weld separation or cracks in connecting parts; 3. Sun exposure and extreme cold causing paint surface cracking; 4. Thin steel plates being eroded by moisture, damaging the protective layers on both inner and outer surfaces, leading to gradual rusting of the body. Methods to repair car body rust: 1. Use a wire brush or sandpaper to remove the paint from the rusted area, then decide whether to replace the entire panel or repair the damaged part based on the extent of damage; 2. Use zinc paste to fill large holes by applying the paste to the hole and then spreading filler around the paste, filling the area, and repainting; 3. Use thin aluminum sheets to patch small holes by pressing them firmly onto the panel, then applying filler and repainting.
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