Corrosion Factor Analysis of Heat Exchange Tubes of Open Rack Vaporizer

At present, the long-term protection measure for the heat exchange tubes of open rack vaporizers (ORV) is to prepare aluminum and its alloy coatings on their surfaces. Due to the long-term exposure to the marine environment, the aluminu-mbased coating on the surface of the heat exchange tube will appear pitting, bulging, shedding, and thinning, which may threaten the safe and efficient operation of the equipment. Here, the factors that affect the corrosion of ORV heat exchange tubes are analyzed, such as sand content of seawater, flow rate of seawater, ion species, and PH value of seawater, etc. The results can provide certain theoretical support for the corrosion mechanism research, life evaluation of protection layer, equipment status monitoring, and daily operation and maintenance of the heat exchange tubes.