At Rudolph Logistik Gruppe, embedded automotive components made of die-cast aluminium are prepared on an industrial cleaning system for further processing in a leading car plant immediately prior to delivery. Welding defects occurred in the plant time and again during processing.
Analysis by Caramba experts revealed that build-up of greasy and oily deposits in the porous surface structure of the parts delivered was responsible for this.
Caramba carried out test washes using various cleaning chemistries in a large series of tests. Good results were achieved with cleaning agents that were able to reduce the oxide layer on the aluminium with their pickling effect in a mildly acidic environment and that were able to remove grease from the surface thanks to their surfactant properties.
Caramba recommended switching the system to Caramba I-Line SD-10 acid cleaner to clean the die-cast aluminium parts to meet the technical requirements of the car manufacturer for surface finish.
Switching to the slightly acidic cleaning agent Caramba I-Line SD-10, enabled the Rudolf Logistik Gruppe to achieve significantly better wash results. Thanks to this, the delivery quality of the aluminium high-pressure die casting parts increased substantially. During further processing by welding in the car plant, welding defects caused by surface contamination hardly occurred anymore. The productivity of the plant increased significantly due to a lower rejection rate and the quality of the welding was within defined error tolerances.