Always ensure a metal-to-metal connection. Never paint over your zincs, as this effectively "insulates" them and stops the protection. Placement: For vessels, BoatCorrosion.com
The performance of a zinc anode is entirely dependent on its purity. Impurities (iron, copper, lead) cause passivation, where the anode stops working. The Zinc Anode 620 must meet strict limits: zinc anode 620 datasheet
If you have a specific datasheet or manufacturer in mind, I'd be happy to review it in more detail! Always ensure a metal-to-metal connection
: Ship superstructures, offshore platforms, jetties, and port facilities. Industrial Infrastructure : Pipelines, bridges, and petrochemical plants. Maintenance lead) cause passivation