The corrosion properties of magnesium and its alloys in high chloride containing environments has been always a challenge to its technical applications. However, in the human body the high chloride environment can be utilized to create implants which help the tissue to regenerate and then completely dissolve. This rediscovered application has been leading to new implants in the market. But more even more important, this innovative R&D field with small quantities in the 10-100kg range, but with high demands on reliability and accuracy of compositions and reliable corrosion rates, new processes, alloys, surface finishing and coatings have been developed – all based on the required service life of the implant and its biocompatibility. This talk will provide an overview on the developments and achievements of the last 15 years in the field of biodegradable magnesium implants.