Is powdercoating bad for rims? Yes, and illegal in Germany. So is using heat to bend them back.

Most powdercoating establishments, including rim repair ‘professionals’ powdercoat and then bake rims between 300F and 400F for around 15-20 minutes. What if I told you that baking aluminum alloy wheels at 300-400f will weaken them permanently? Aluminum is annealed when new, which for the laymen means they heat up the metal and let is cool in a very controlled way to create ductile yet strong grain structures in the aluminum. The baking process after powder coating will bring the rims to a high enough temperature to begin changing this annealing. TUV, or Technischer Überwachungsverein in Germany certifies all items and processes for vehicle components. Without TUV certification, an item cannot be used on any Germany roads. During refinishing or repair TUV completely forbids any alloy rim from being heated past 90c (194F) for any period of time, and for a maximum of 40 min for temperatures under 90C. “Eine max. Einwirktemperatur/ -zeit von 90°C/ 40 min. darf bei Lackierarbeiten nicht überschritten werden. Pulverbeschichtungen mit höheren Temperaturen und Einwirkzeiten sind nicht zulässig. Auf Grund des Wärmeeintrages und/ oder der Benetzung mit Lacken, wird empfohlen, vorhandene Ventile nach den Lackierarbeiten zu ersetzen.”   Now what about how the majority of rim repair … Continue reading Is powdercoating bad for rims? Yes, and illegal in Germany. So is using heat to bend them back.