Home/Technical Glossary/Corrosion Resistant Laser Marking Corrosion Resistant Laser Marking Corrosion resistant laser marking; This method of marking is primarily for medical device parts. Typically a dark mark is produced on a stainless steel part that is required to survive the passivation process and repeated auto claves used for sterilization for reusable medical devices. Ultrafast picosecond lasers are ideal for this application. Read our paper Dark Marking with Picosecond Lasers.