How Many Years Will It Take for Car Sheet Metal to Rust After Repair?
2 Answers
Sheet metal repairs typically start rusting within 2-3 years, primarily because ordinary steel plates are used in the process. Here are the relevant details: 1. Thin Steel Sheets: A car's exterior panels are made of thin steel sheets that undergo comprehensive anti-rust treatment during manufacturing. As long as they haven't been severely damaged or subjected to welding repairs, they won't corrode. Therefore, while sheet metal repairs are possible, welding should be avoided as it damages the anti-rust coating. Once the anti-rust layer is compromised, the metal loses its rust protection, and vehicles in coastal areas may rust through within two to three years. 2. Automotive Sheet Metal Repair: This refers to the process of repairing a vehicle's body after a collision, encompassing all work except for anti-corrosion and decorative spray painting.
I had my car door repaired last year, and the mechanic said this type of job mainly depends on three things: First, whether the steel plate used for patching is solid enough—cheap thin sheet metal will start bubbling within a year or two. Second, whether the welding spots were treated with rust remover—if the corners aren’t coated with anti-rust adhesive, rainwater can seep in and cause rust holes in just three months. Third, don’t skimp on body filler—the kind mixed with gypsum will crack in winter and rot from the seams by the next year. My neighbor’s car had bodywork done and sat outdoors for five years with no issues—they spent big on galvanized steel plates and sprayed protective coating on the undercarriage every quarter. It really comes down to whether you’re willing to invest in quality materials.
