4 reasons why LED lamp beads turn black and fail
1. The blackening of the lamp bead is due to the chemical reaction between the silver-plated layer of the lamp bead bracket and the Cl (chlorine) element to form AgCl (silver chloride).
2. Cl (chlorine) element was detected in the silver-plated layer and the bottom of the silica gel of the blackened lamp bead bracket, while no Cl (chlorine) or other abnormal pollution elements were detected in the silver-plated layer and the bottom of the silica gel of the unused lamp bead bracket. Explain that Cl (chlorine) element enters from the outside of the lamp bead to the inside after the lamp bead is used.
3. Cl (chlorine) element was detected in both the expired light strip and the waterproof glue that was not lit using the light strip, indicating that the waterproof glue has the pollution source conditions.
4. During the lighting and use of the LED light strip, due to the action of heat, the waterproof glue of the light strip releases Cl (chlorine) substances. These chlorine-containing substances can penetrate through the lamp bead encapsulation silica gel in the closed interior space of the light strip. Inside the lamp bead, a chemical reaction occurs with the silver-plated layer of the lamp bead bracket to form AgCl (silver chloride), which will cause the appearance of the lamp bead to turn black and eventually lead to a decrease in the brightness of the lamp bead.
