Corrosion for Everybody

Corrosiveness of Fuels During Storage Processes

“…Corrosion leads to the formation of products which are likely to cause changes in the quality of fuels (affecting their physical and chemical properties), may accelerate oxidation of hydrocarbon ingredients of the fuel -this leads to higher acid values and to the development of gum and sludge in the fuel. Carbon-steel storage tanks, intended for long-term (5 years a minimum) storage of fuels, may affect the chemical stability of fuels (increased content of oxidation products) [1].…”

“…That part of the aboveground tanks is most exposed to contact with water, any salts that may be dissolved in it and its organic and inorganic deposits. The organic deposits are composed of hydrocarbons and bio-films, whereas the inorganic deposits may comprise corrosion products, salts, and sand [1].…”

“…Also important are the design features of the tank itself, such as roof type (floating or fixed), the presence of pontoons, tank breathing solutions, as well as its location. Typical tanks for storing gasoline or petroleum are provided with floating roofs and pontoons which limit fuel evaporation and losses through safety valves [1].…”

“…If increased (for instance, due to the penetration of steam into storage tanks), it does have an effect on corrosion processes. In gasoline with a water content of 80 ppm or less, the rate of corrosion on carbon steel is 0.001 mm/year; in those with a water content of 200 ppm -corrosion rate is as high as 0.4 mm/year [1]. Part of the steel or metal surface is wetted with water, which forms thin (from 3-10 μm), interrupted water films between the metal and the organic phase.…”

Arsenic Removal from Zimapan Contaminated Water Monitored by the Tyndall Effect

“…Through the anodic reaction, the anode oxidizes and, thus, corrodes. By applying an electrical potential to the metal surface between the electrodes, this process can be altered [32]. Since zinc and copper are the main elements of brass electrodes, they corrode both in acidic and alkaline solutions, but resist corrosion well in neutral solutions [32].…”