What is the optimal spray pressure and water temperature setting for the Degreasing Washing Line to ensure the adhesive never peels off, and how does this affect my annual chemical cost?

The performance of your Degreasing Washing Line is the undisputed king of final bonding quality. If this line fails, all downstream investments are wasted. For a three-stage spray-type Degreasing Washing Line, the optimal parameters are: Stage 1 (alkaline degreasing) at 55°C-60°C with a spray pressure of 3.5 bar; Stage 2 (tap water rinse) at ambient temperature with 2.0 bar; Stage 3 (DI water rinse) at 40°C with 1.5 bar. The most common operational mistake is lowering the temperature to save energy, dropping Stage 1 to 45°C. At this lower temperature, the saponification reaction slows by 40%, meaning the rolling oil isn’t fully emulsified. This leaves a residual carbon layer invisible to the naked eye, which acts as a release agent, causing your honeycomb core to detach during the peel test. However, increasing the temperature to 60°C on a 12-meter long Degreasing Washing Line consumes about 150 kW/h of steam. To balance quality and efficiency, install a heat recovery system that preheats incoming cold water using the hot wastewater discharge; this recovers 30% of the thermal energy. Regarding chemical consumption, a well-tuned Degreasing Washing Line with automatic conductivity controllers maintains the bath concentration at 3%-5%, using only 2.5 kg of degreaser per ton of aluminum processed. Without these controllers, operators tend to over-dose manually, pushing consumption to 5 kg/ton. Annually, for a 5,000-ton output, this difference represents a chemical cost saving of $12,000. The line’s throughput is dictated by conveyor speed—typically 3-5 minutes of immersion time, which at 6m/min speed gives you a production rate of 360 meters of coil per hour, sufficient to feed two hot presses simultaneously.