Above Ground Water Storage Tank Cathodic Protection

Process vessels tanks 1 heat exchangers 2 condenser waterboxes 3 vessels for various chemical processes e g.

Above ground water storage tank cathodic protection. Cathodic protection also known as galvanic cathodic protection is a corrosion protection technique in which the metallic surface to be protected is intentionally made the cathode in a galvanic cell. Nace rp0193 2001 external cathodic protection of on grade carbon steel storage tank bottoms. Tank cathodic protection using matcor tank ring anode system for above ground storage tanks asts while the field fabricated and field installed grid anode system has been in use for over 20 years some faults have been discovered. Above ground storage tanks 1 water tanks e g.

Cathodic protection provides electrical current to those areas not isolated from the environment by virtue of being coated and therefore stops the corrosion cycle. Galvanic protection systems can be applied to tank bottoms where the metallic surface area exposed to the electrolyte can be minimized through the application of a dielectric coating or the area is small due to the tank size or configuration. Fire water irrigation water potable water 2 crude oil tanks 3 diesel tanks. This method involves electrically connecting the tank s metal components either directly or indirectly to another easily corroded metal.

The leaks which cursory reports believe to be the likely the result of corrosion could have been avoided by implementing proper cathodic protection systems.