Method of Treating or Maintaining an Apparatus

A method of treating or maintaining an apparatus, the method comprising:

• subjecting at least one treated component of an apparatus to cathodic protection, the at least one treated component being that having surfaces treated with a coating of a treatment composition of a colloidal particle dispersion having inorganic nanoparticles with an average particle size from 300 nm or less that exhibit properties of Brownian motion, at least some of the inorganic nanoparticles being positively charged nanoparticles, and wherein at least some of the positively charged nanoparticles reside on the surfaces when the at least one treated component of the apparatus is subjected to the cathodic protection, the apparatus comprising at least one of a man-made body, a man-made structure, a tank, a storage tank, a mixing vessel, a vessel, a storage vessel, a valve, a pipe, a container, a drum, an aquatic vessel, a reactor, a combustor, a refrigeration unit, a cooling unit, a heat exchanger, a boiler, a radiator, a separator unit, an evaporator, a pump, a compressor, a tower, a column, a cooling tower, a filter, a filtration unit, a slug catcher, a Joule Thomson (JT) system, a cracking unit, a pyrolysis unit, a refining unit, a coalescer, a dehydrator, an amine unit, an amine system, a chemical processing system, a food processing system, a gas processing system, a petroleum processing system, a biomatter processing system, and a water processing system.