dmcgriff8 said:
Is there a specific type of ohmmeter to use. A model or brand?
No. If you're working in a manufacturing facility, check with your maintenance people-someone has one. Any meter used for checking electrical continuity will work. Note that an aluminum part with a very thin coating of oxidation (that's what anodizing does--it oxidizes the surface) might show continuity, so the test is not conclusive. The anodizing specification should give the expected thickness, and in almost all instances where anodizing has effectively coated the part, there should be no continuity. Note also that clear coatings such as paints and sealers would have the same effect with regard to electrical continuity, so the test is not necessarily indicative of the part having been anodized. If there is electrical continuity across the surface of the part, you can be pretty sure that it has not been anodized.