Water Storage Containers Exhibiting Reduced Corrosion, and Devices and Methods for Reducing Rate of Corrosion in Water Storage Containers

Abstract

A water storage tank includes: a tank containing water; a roof positioned over the tank; a headspace region formed between the roof and a surface of the water contained in the tank; and a corrosion reduction system. The corrosion reduction system includes (i) a port that enables air to flow out of the water storage tank, and (ii) an active air ventilation system having at least one device configured to facilitate movement of air exterior of the water storage tank into the headspace region. The corrosion reduction system reduces a rate of corrosion of the water storage tank. A method of reducing a rate of corrosion of a water storage tank is also included.

The invention claimed is 
     
         1 . A water storage tank comprising:
 a tank containing water;   a roof positioned over the tank;   a headspace region formed between the roof and a surface of the water contained in the tank; and   a corrosion reduction system comprising: (i) a port that enables air to flow out of the water storage tank; and (ii) an active air ventilation system comprising at least one device configured to facilitate movement of air exterior of the water storage tank into the headspace region,   wherein the corrosion reduction system reduces a rate of corrosion of the water storage tank.   
     
     
         2 . The water storage tank of  claim 1 , wherein the device of the active air ventilation system is configured to facilitate the movement of air exterior of the water storage tank into the headspace region in a direction that is non-perpendicular to the water surface. 
     
     
         3 . The water storage tank of  claim 1 , wherein the device of the active air ventilation system is configured to facilitate the movement of air exterior of the water storage tank into the headspace region substantially laterally across an interior surface of the roof. 
     
     
         4 . The water storage tank of  claim 1 , wherein the device of the active air ventilation system comprises air vent openings that fluidly connect the air exterior of the water storage tank to the headspace region. 
     
     
         5 . The water storage tank of  claim 4 , wherein the device of the active air ventilation system comprises at least one screen that is positioned over at least one of the air vent openings. 
     
     
         6 . The water storage tank of  claim 1 , wherein the active air ventilation system further comprises an air-moving device that facilitates an exchange of air between an interior and exterior of the water storage tank. 
     
     
         7 . The water storage tank of  claim 1 , wherein the active air ventilation system comprises a deflector that directs air exterior of the water storage tank into the headspace region in a direction that is: (i) non-perpendicular to the water surface; or (ii) substantially laterally across an interior surface of the roof. 
     
     
         8 . The water storage tank of  claim 6 , wherein the active air ventilation system comprises a deflector that is in fluid communication with the air-moving device, and wherein the deflector directs air exterior of the water storage tank into the headspace region in a direction that is: (i) non-perpendicular to the water surface; or (ii) substantially laterally across an interior surface of the roof 
     
     
         9 . The water storage tank of  claim 1 , further comprising a mixing device configured to bring cooler water to a surface of the water in the water storage tank. 
     
     
         10 . The water storage tank of  claim 1 , wherein at least a portion of the water storage tank and/or at least a portion of an interior of the roof is formed from a material that is prone to corrosion. 
     
     
         11 . The water storage tank of  claim 10 , wherein the material that is prone to corrosion comprises a metal. 
     
     
         12 . The water storage tank of  claim 1 , wherein the corrosion reduction system reduces the rate of corrosion of the water storage tank by at least about 10% to at least about 90% as measured by ASTM G50-10(2015). 
     
     
         13 . A method of reducing a rate of corrosion of a water storage tank comprising actively exchanging air exterior of the water storage tank with air inside the water storage tank with a corrosion reduction system to reduce the rate of corrosion of the water storage tank,
 wherein the corrosion reduction system comprises: (i) a port that enables air to flow out of the water storage tank; and (ii) an active air ventilation system comprising at least one device configured to facilitate movement of air exterior of the water storage tank into a headspace region formed between a roof positioned over the water storage tank and a surface of water contained in the tank.   
     
     
         14 . The method of  claim 13 , wherein the corrosion reduction system is retrofitted into the water storage tank. 
     
     
         15 . The method of  claim 13 , wherein the device of the active air ventilation system is configured to facilitate the movement of air exterior of the water storage tank into the headspace region in a direction that is non-perpendicular to the water surface. 
     
     
         16 . The method of  claim 13 , wherein the device of the active air ventilation system is configured to facilitate the movement of air exterior of the water storage tank into the headspace region substantially laterally across an interior surface of the roof 
     
     
         17 . The method of  claim 13 , wherein the active air ventilation system further comprises an air-moving device that facilitates an exchange of air between an interior and exterior of the water storage tank. 
     
     
         18 . The method of  claim 17 , wherein the active air ventilation system comprises a deflector that is in fluid communication with the air-moving device, and wherein the deflector directs air exterior of the water storage tank into the headspace region in a direction that is: (i) non-perpendicular to the water surface; or (ii) substantially laterally across an interior surface of the roof. 
     
     
         19 . The method of  claim 13 , wherein the water storage tank comprises a mixing device, and wherein the method further comprises actively mixing with the mixing device such that cooler water is brought to a surface of the water in the water storage tank. 
     
     
         20 . The method of  claim 13 , wherein the corrosion reduction system reduces air temperature, humidity, and levels of oxidizing vapors in the headspace region of the water storage tank. 
     
     
         21 . The method of  claim 13 , wherein the method reduces the rate of corrosion of the water storage tank by at least about 10% to at least about 90% as measured by ASTM G50-10(2015).