A number of test projects have measured the deposition rates of the combustion products of residual-oil-type fuel. This paper analyzes those results to obtain information on he effects of the gas and metal temperatures on the deposition rates. While the data is far from complete, certain major trends result from the data. For a given gas temperature, the deposition rate increases with decreasing metal temperature below the level of the gas temperature until a maximum rate is reached at ∼1200°F (650°C); then the deposition rate decreases as the metal temperature is further lowered and becomes small at metal temperatures near 700°F (370°C). For a given metal temperature, the deposition rate increases with higher gas temperatures. This may occur at an increasing rate for gas temperatures above 2000°F (1100°C).

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