What is NOT true about anodizing a metal?

Anodizing is an electrochemical process that creates a protective oxide layer on metal surfaces, typically aluminum. This process enhances corrosion resistance and surface durability, making it highly suitable for marine applications.

Regarding the assertion that anodizing produces a coating that is easily repairable, this is not accurate. While anodized surfaces can be restored to some extent, they are not as easily repairable as paint or other coatings, particularly because the anodized layer is integral to the metal substrate. Repairing an anodized surface often requires re-anodizing the entire section or component, which can be costly and complex. Furthermore, anodizing does not simply function as a surface layer; it modifies the metal itself at a chemical level, making the repair process more difficult and expensive than other methods.

Thus, the statement about anodizing being easily repairable and expensive does not align with the typical characteristics of the anodizing process, making it the least accurate description among the options provided.