Plastic Water Heater With A Lifetime Warranty

摘要

When two metals are physically connected in water, the more reactive of the two corrodes. To protect traditional steel water heaters from rusting from the inside out, manufacturers include an aluminum or magnesium anode rod in the tank. The rod is more reactive than the steel tank, and thus takes the corrosion. Trouble is, these sacrificial rods typically last only as long as a tank's warranty period, and then electrolysis begins to attack the steel tank. Water Heater Innovations, a subsidiary of Rheem, has eliminated this worry by eliminating the metal.