July 27, 2020

Usage of paint thickness meter

If a second-hand car is in the case of an accident, there must be traces of sheet metal or spray paint repair on the body paint, and the scope of repair will be relatively large. Therefore, as long as the detection of second-hand accident vehicles is involved, it is necessary to do paint inspection items to reveal the history of large and small accidents that have occurred in the vehicle, and to determine whether the vehicle is an accident vehicle. It can be said that if you understand the paint finish of the vehicle, you can roughly understand the history of the car and the accident. Of course, if you want to fully and accurately determine whether the vehicle is a technically recognized accident vehicle, you still need a professional second-hand car appraisal appraiser to pass professional equipment, and take the comprehensive inspection results of the chassis, front and rear anti-collision beams, and body structure as quasi.
If it is only to detect the paint surface of the car body, you can use the second-hand car identification artifact-"paint surface detector" to uncover the historical veil of vehicle sheet metal painting
As the name implies, the paint thickness meter is an instrument that detects the value of the paint surface of the car body. It determines whether there are traces of sheet metal or spray paint by testing the thickness of the paint surface and the iron skin of the body. In the inspection, the car roof is generally used as the benchmark. If the value of other parts is significantly higher than the benchmark value, the part of the vehicle can be judged to have undergone sheet metal and spray paint trimming. In the process of second-hand car identification, if the inspector finds that the difference between the value and the reference value is very large, the vehicle will be further inspected to see if there is any trace of an accident there and determine whether it is an accident car.
Tips: The paint surface of the new car is sprayed by computer automation, and it is carried out as a whole in a very clean dust-free workshop, so the thickness between the paint surface and the car body metal will be very uniform, and there will be no large difference. The paint sprayed manually after the vehicle is partially damaged is actually impossible to achieve the same thickness as the original paint. In addition, if there is repair of sheet metal, putty glue is applied between the paint surface and the metal, and the thickness between the paint surface and the metal will be greater.
Generally, the thickness of most cars is between 80-140, and a small number of imported cars may reach more than 150. If you test the left door of the car, you can test the five points on the top, bottom, left, right and middle of the door. The value you want to add and divide by 5 is the average value. If the value of a point is greater than the average value by more than 30um, it is judged that the car may be repaired. Of course, if the car door is completely replaced, it needs to be inspected from internal screws and other joint parts. Please pay attention to related articles for testing in this area.