Ultrapure Magnesium Alloy With Adjustable Degradation Rate

A composition comprising:

• a MgZnCa alloy containing nanosized precipitates being less noble than a MgZn alloy, having a Zn content ranging from 3.0 wt. % Zn to 6 wt. % Zn and a calcium content ranging from 0.0005 wt. % to 1.0 wt. %, less than 0.001 wt. % of one or more other elements located in a secondary phase and with the remainder of the alloy being Mg.

A composition comprising a MgZnCa alloy containing nanosized precipitates being less noble than Mg matrix alloy, a plurality of nanosized precipitates being more noble than a MgZn alloy, and having a Zn content ranging from 3.0 wt. % Zn to 6 wt. % Zn and a calcium content ranging from 0.0005 wt. % to 1.0 wt. %, less than 0.001 wt. % of one or more other elements located in a secondary phase, with the remainder being Mg.

The composition according to any of claims 1-4, wherein each alloy contains less than 5 ppm of total other elements.

The implant according to any of claims 18-24, wherein the implant has a lower degradation rate compared to implants made from magnesium alloy containing microgalvanic elements.

A composition comprising:

• a MgZnCa alloy, having a Zn content ranging from 3.0 wt. % Zn to 6 wt. % Zn and a calcium content ranging from 0.0005 wt. % to 1.0 wt. %, less than 0.001 wt. ° A of one or more other elements located in a secondary phase and with the remainder of the alloy being Mg, wherein the MgZnCa alloy contains nanosized precipitates being less noble than the Mg remainder.