DEPOSITS AND CORROSION
IN HIGH TEMPERATURE AREAS

The combustion of fuel oil with high vanadium, sulphur and sodium content results in corrosive deposits adhering to high temperature (450°C and above) metal surfaces. Deposits are built up when reaction products from these compounds melt and are deposited on the hot surfaces, especially in the superheater area of a boiler. In a diesel engine these compounds form molten deposits on the exhaust valve seat, in the nozzle ring and on the blades of the turbocharger.

Vanadium salts are extremely corrosive, since they dissolve the protective oxide film on the metal surfaces and then transport oxygen to the clean surfaces which corrode.

In order to prevent or reduce deposits and corrosion, the melting point for the sodium and vanadium salts must be raised. A higher melting point means drier and more brittle deposits which do not adhere to the metal surfaces and are easy to remove or will be carried through the boiler or diesel engine.

Without Bycosin.  May 29 1999.		After treatment with BYCOSIN. September 30 1999.

BYCOSIN DP94001 is a highly concentrated organometallic additive for heavy fuel oils. The product, which is neutral and oil soluble, is especially effective against high temperature corrosion and deposits in power plant boilers. It is also very effective in bringing the stack solids down. The product contains suitable surfactants which were carefully selected through our long-term experience in dispersing the heavy fraction, for instance asphaltene contents, in the oil.

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