If the back of your aluminum baking pan is rubbing off black material, it is likely that the pan has developed some form of damage or corrosion. While the front (where the food goes) may still appear fine, the presence of black material on the back raises concerns about the pan's safety for cooking.
Aluminum cookware, especially baking pans, can develop oxidation and corrosion over time, especially if they have been exposed to high heat, certain acidic foods, or harsh cleaning agents. The black material could be a sign of degraded aluminum or other impurities that have leached onto the surface.
Cooking with a damaged or corroded baking pan can pose health risks, as the black material may potentially contaminate the food during the cooking process. Ingesting aluminum particles is not considered safe, and prolonged exposure to aluminum has been linked to certain health issues.
To ensure food safety, it is best to discontinue using the baking pan if you notice any signs of deterioration or damage. Instead, consider replacing it with a new aluminum baking pan or opt for other safe alternatives like stainless steel, cast iron, or ceramic bakeware.
Additionally, when cleaning aluminum bakeware in the future, avoid using abrasive cleaners or harsh scrubbers, as these can contribute to the breakdown of the pan's surface. Use mild dish soap, warm water, and a soft sponge or cloth for regular cleaning.
Always prioritize the safety of your cookware to maintain the integrity of your meals and safeguard your health.