CNS 8406-2-2010 standard specifies the eddy current test method for anodic oxide coatings Film thickness of aluminum and aluminum alloys. It is suitable for the measurement of anodic oxide coatings Film thickness on aluminum and aluminum alloy products, and the content of the oxide film thickness standard plate is added. The method takes into account the shape of the product, the type of oxide film and the film thickness, and is determined by negotiation between the buyer and the seller. Including Microscope cross-section test method, eddy current test method and beam of light Microscope test method, it provides a standardized method for the accurate measurement of anodic oxide coatings Film thickness of aluminum and aluminum alloys.