The course of consistent capacity research was demonstrated from endothermic hydrocarbon fuels and nickel-base-alloy

and the co-heating device was designed for the fuels and alloy. The mechanical capacity and metallographic diagram were gained

whenever the passivated test-slices of GH625 and GH3128 were put under wall temperature about 500-850℃

pressure about 3.5MPa

fuel temperature about 450-500℃

and velocity about 1-5m/s fuels. The experiment results showed that

under the fuel temperature about 500℃ and test-slice temperature about 850℃

the coking capacity of GH3128 was less than GH625

and the plastic stress declined about 40% for GH3128 and 60% for GH625. After the test-slice of alloy was passivated

the coking capacity was obviously cut down.