[China Aluminum Network] First look at the thickness of the aluminum coating plate surface coating or coating thickness, the thickness of the substrate. The thickness of the better aluminum buckle plate coating is only 0.02~0.03mmz, and the thickness of the coating film is often only 0.15mm or less. The defective aluminum buckle plate is often used on the aluminum substrate and the aluminum buckle plate coating or the coating film, usually Choose to reduce the thickness of the aluminum substrate, and spray more than a few coats on the aluminum substrate or use a very thick coating, and even the aluminum buckle plate aluminum substrate in the market as long as 0.15mm, there is a 0.4mm cover film. Excessive thickness, overcoating, or excessive film thickness can also degrade the performance of the aluminum pinch.
Followed by a good investigation of the aluminum buckle plate exposed aluminum, such as cross-section can be crystal fine, whether the gray, dark and impurities; strike with the finger of the aluminum buckle plate, better material aluminum buckle plate metal sound significantly more prominent Poor raw materials, boring, metal sound is not significant.
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