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Q. Explain about Napthenic Acid Corrosion?
Some crude oils contain napthenic acids, which, at elevated temperatures, may contribute to more active corrosion with or without the presence of water. The critical temperature at which severe corrosion may occur is significantly lower than if only sulphur was present. Type 316 stainless steel and Inconel 600 show the best degree of corrosion resistance. Type 502 (5% Cr) low alloy steel is useful where there is increased fluid velocity, except in furnace and heat exchanger parts. Stainless steel types 304, 321, and 347 may also be unreliable in these services.
There is some indication that napthenic acid corrosion may be mitigated by passivation of the surfaces with a thiazoline / phosphite mixture at temperatures of 550° - 660°F (200° - 316°C).
What does initial velocity mean?
Fluid Friction: Fluid friction manifests when the lubricating fluid is introduced between contact surfaces of the two bodies. If thickness of lubricant or oil between the m
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The salary calculation method for employees of a company is as follows: (1) If the number of working hours exceeds 120 hours, an additional 15% will be issued for the excess part;
#wHAT WILL BE THE PULLEY CRITERIA TO DECIDE THE RPM
what is fluid?
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#A spherical aluminum vessel has an inside diameter of 30 cm and contains water at 80 ?C, with a quality of 1%. The vessel is then heated until the water inside is saturated vapor.
Find out their common velocity: An aeroplane weighing 40 kN horizontally moves with a velocity of 20 m/sec (72 kmph, that means 72 km per hour). A helicopter of weight 20 kN i
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