Do glass lined water heaters rust?

Glass-lined water heaters are designed to prevent rust and corrosion by coating the interior tank with a layer of glass. This coating acts as a barrier against water and minerals that can cause rusting over time. However, if the glass lining becomes damaged or compromised, it can expose the metal underneath, leading to rust formation. Regular maintenance and inspection can help ensure the integrity of the glass lining and prolong the lifespan of the water heater.