This thesis investigates the relationship between chemical surface contamination andadhesion performance in industrial applications, focusing on insulation tape used inScania’s battery module production. Two manufacturing challenges are addressed: poorlaser weld quality and tape adhesion failures, both stemming from surface contaminationby oils and greases.Due to equipment limitations and time constraints, the study prioritizes the developmentof methods for contamination measurement and evaluating the effects on tape adhesion.Interferometry, fluorescence spectroscopy, and gravimetric analysis were applied toquantify surface cleanliness, and a custom-built tape peel test rig was used to simulatereal-world adhesion performance.Experiments demonstrated a measurable correlation between increased surfacecontamination and reduced adhesion force. Fluorescence measurements proved effectivein detecting relative contamination levels, though accurate quantification depended onsubstrate type and oil properties. A strong link between fluorescence intensity andadhesion strength was observed for uncoated steel plates, highlighting the technique’spotential for quality control applications.The results support Scania’s need to define contamination thresholds and establishprocess reliability, even when the exact contaminant is unknown.