The conductivity of aluminum cans refers to the integrity of the inner coating, which can be reflected by measuring the current value in the electrolyte. The exposed positions of the inner coating of aluminum cans on aluminum cans are relatively scattered, commonly found in the grooves and side walls of the grooves at the bottom of the cans, and the upper and lower walls of the cans.
Exceeding the conductivity of aluminum cans is a common problem encountered by aluminum can factories. After the can factory finds the cans that exceed the standard, it will generally find the cause immediately, expand the sampling inspection, further lock the scope of the cans that exceed the standard and isolate them. The bottling plant does the acceptance of aluminum cans and conducts conductivity sampling. Once the cans with seriously exceeded conductivity are detected, in order to avoid potential harm to their products, such as: affecting the flavor and appearance of the product; perforation and leakage may occur after a certain period of storage..., they often decide to reject the batch of aluminum cans.
Aluminum can manufacturers have their products returned by customers due to excessive conductivity, which has led to increased costs and even lost orders. The losses are self-evident. Therefore, solving the problem of excessive conductivity of aluminum cans is a topic that every aluminum can manufacturer must face.
The inner coating integrity (conductivity) standard for aluminum cans refers to the national standard "Packaging Container Aluminum Easy-Open Two-piece Can" (GB/T 9106.1-2009), that is: beverage can body, single ≤30mA, average ≤8mA; beer can body, single ≤75mA, average ≤50m.
