18x100mm 99.99% Mg Rod

Physical specification: Cylindrical rod measuring 18 mm in diameter and 100 mm in length. Made exclusively from solid high-purity magnesium (99.99% Mg content), with no binders, plating or secondary metals. Typical mass: ~220 g. Surface finish is as-cast with minor machining tolerance; no oil or protective coating applied. Functional principle: Operates via galvanic series displacement — magnesium oxidises preferentially to protect less active metals (e.g., carbon steel, cast iron) immersed in conductive media. Also reacts slowly with calcium/magnesium bicarbonates in water, reducing temporary hardness. Deployed in domestic hot water systems, rainwater harvesting tanks with galvanised linings, district heating interface units, and mobile water purification rigs. Particularly suited to UK’s soft-to-moderately hard water zones where electrochemical protection complements mechanical filtration.