Reasons for irregular oxide film of alloy aluminum coil

We should all know that there is an oxide film on the surface of the alloy aluminum coil, which can protect the alloy aluminum coil, but sometimes we will find that the oxide film will appear uneven color. So what's going on? Next, Shandong Jincheng Aluminum Co., Ltd., a manufacturer of alloy aluminum coil, will introduce the causes and prevention of irregular oxide film of alloy aluminum coil.

alloy aluminum coil

Q: The swing working area in the slot is too big, and then the color of the oxide film is inconsistent.

A: Preventive measures: the oxidation workpiece has small rotation fluctuation and can be handled quietly, but when the solution temperature is too low, it is prone to map spots, which is unnatural

Q: When the damaged part of the alloy aluminum roll processing coating is cut off, the outside is wearing high-quality aluminum alloy, and the inner layer is miscellaneous aluminum. Due to the great difference, there will be "vitiligo" spots after oxidation.

A: Preventive measures: strictly regulate the materials and reduce or remove miscellaneous aluminum.

Q: The alkaline etching treatment of the workpiece during the process operation is incomplete, and some of the original oxide film and dirt cannot be removed; dispose immediately after alkaline etching light, and the surface is still alkaline; the workpiece in the transfer process is in contact with foreign matters.

A: Preventive measures: strictly ensure the integrity of alloy aluminum coil process in the production process, so as to produce better products.