Inconel
alloy is a nickel-chromium alloy that has resistance to caustic corrosion,
oxidation at high temperatures, ultra-high purity water corrosion & stress
corrosion cracking. Applications of Inconel alloy are in
·
Nuclear engineering
·
Furnace components
·
Sparking electrodes
·
Food processing
·
Chemical processing such as reaction vessels, transfer
piping, heat exchangers and evaporators.
·
Air pollution control such as dampers, stack liners, fans,
ducts, stack-gas reheaters, housings and scrubbers.
Rapid temperature changes
Inconel
wire has high oxidation resistance at low/high temperature conditions,
therefore, a single basket made of Inconel can be used in processes where
temperatures change between near-cryogenic lows & heat treatment highs.
Inconel is highly useful for manufacturing processes that combine high &
low temperature processes in rapid succession.
Jet engines
Various
manufacturing units use Inconel alloy in the construction of Jet engines and
turbines. Jet engines need to withstand low & high extreme temperatures
frequently during use. At 36,000 ft., the average air temperature is -56.3°C
and the combustion process can exceed temperatures of 1,150°C as per the
meteorology training website. Inconel retains tensile strength & oxidation
resistance during rapid changes in temperature in the combustion process and
cooling technologies used in the aerospace industry to rapidly reduce
temperatures. Inconel is suitable for chemical resistance & extreme
temperature conditions. Inconel is especially suitable for processes in which
temperature elevations would normally reduce the oxidation resistance of other
metals.
Heat treat applications
Inconel
has resistance to extreme temperatures and retains a good amount of tensile
strength at high temperature to continue holding moderate loads. Inconel is
suitable for heat treat applications as it won’t lose shape easily when holding
parts through a rigorous heat treat application.
Saltwater applications
Inconel
has excellent resistance to sodium chloride (salt) at different temperatures,
therefore, it is used in marine applications. Inconel is suitable for part
washing basket in processes that use salt or in factories located near the
ocean. Stainless steel alloys also have resistance to salt water however
Inconel alloy is preferred for high temperatures.
Corrosion resistance
Inconel
alloys are resistant to various types of corrosive media such as alkalis,
moisture, salt solutions, non-oxidizing acids & organic acids. Stress
corrosion cracking doesn’t occur and this alloy has a small tendency to
selective corrosion. Pitting corrosion rarely occurs and this alloy has
resistance to gases such as chlorine, hydrogen fluoride, carbon dioxide,
hydrogen chloride, oxygen & sulphur dioxide. No heterogeneous structure
occurs in these alloys as copper & nickel form a continuous series of solid
solutions. Inconel alloy has excellent resistance to hot seawater at high flow
rates. This alloy remains stable up to a moderate flow rate of 6m/s.
Inconel
is alloyed, processed & melted using special designs to have excellent
resistance to low-cycle & thermal fatigue at temperatures up to 1200°F.
Inconel is used in various types of process or transport piping in Aircraft
exhaust, automotive flexible coupling bellows & expansion joints. Inconel
is also designed for excellent corrosion resistance in severe environments in
pollution control, industrial/municipal waste treatment, chemical processing,
pulp/paper production.
No comments:
Post a Comment