Comparative analysis of razor blade coatings using Auger electron spectroscopy

Razor blade technology involves not only the forming of the cutting edge (final facet) but the protection of that edge from damage and corrosion. This requirement has led to the deposition of various-types of metallic, ceramic and organic coatings to the final facet to prolong the useful life of the blade. In this study, Auger electron spectroscopy and secondary electron microscopy are employed to characterize the final facet of razor blades from various manufacturers. Each analysis emphasized the final facet morphology and coating composition. The blades are analyzed before and after 'pithing' to remove the fluorocarbon lubricant and other oils found on most blades. The typical coating was found to be chromium, but platinum alloys and iron oxides are also observed. The chromium coatings are fully oxidized in some cases, and in others exhibit only a surface oxide. Sputter depth profiling is implemented to determine relative coating thickness and interfacial chemistry.