Why Do New Cars Have Rusty Screws?

[Drew]

New cars having rusty screws may indicate they are inventory vehicles that have been stored for an extended period, leading to screw rust. Solutions for rusty screws are as follows: 1. Tap the screw with a hammer or wrench. When a screw is rusted, avoid forcing it with a wrench as this will only tighten it further. Instead, use a wrench to grip the screw and strike the wrench handle with a hammer. A few firm strikes will loosen the rusted parts inside the screw, making it much easier to turn. 2. Apply cola to the rusted screw. Rust primarily consists of iron oxide, and cola contains carbonic acid, which reacts chemically with the rust, making it easy to remove and allowing the screw to turn freely. 3. If the screw is severely corroded, heating it with a flame is an option. Use an oxyacetylene torch to thoroughly heat the screw, then apply a drop of oil to the heated screw. The principle of thermal expansion and contraction will create more space between the screw and the nut. 4. Directly spray rust remover onto the rusted screw. Once the rust remover penetrates the screw, it can be easily unscrewed.