The TV is plugged into the shielding cover, what is the reason for the yellowing of the shielding cover + stamping shielding products are as smooth as jade

The hardware manufacturer that produces the TV plug-in shielding cover said that in our actual application, the surface of the shielding cover often encounters yellowing. It seriously affected the appearance, quality, and use of customers. Xiaoshuo has compiled the following information and will work with you to understand what causes the shield to turn yellow. 1. The production of the shielding cover does not control the raw materials in place, so that the material of the shielding cover, before the production, the foreign cupronickel material has been naturally oxidized, and the phenomenon of yellowing has occurred. 2. The cleaning after the shielding cover is produced, and the improper combination of the cleaning solution causes a chemical reaction to the nickel silver material, causing the shielding cover to turn yellow. 3. In the soldering process of the SMT factory, some formulas are not matched properly, which causes the yellowing of the surface of the shielding cover when the shield is over the furnace at high temperature. 4. The storage environment is not up to standard. In general, metal materials will have natural oxidation. If the storage environment is not up to standard, it will accelerate the oxidation of the shielding cover, thereby accelerating the yellowing of the shielding cover. Hardware, 15 years of focusing on TV plug-in shielding, 20,000+ sets of mold customization production experience, 2 days for proofing, 4 days for mold making, and 2 days for delivery. The flatness of the shielding cover is controlled within 0.07mm, the daily production capacity is 3 million strokes, and 16 quality inspections are strictly controlled. It can quickly solve the urgent problem of time when choosing the shielding cover, solve the problem of flatness, solve the problem of production quality, let you choose, choose to rest assured!