Hey, guys.
Can someone please clarify whether the PREN value refers to the susceptibility of an alloy to form a corrosion (localized) pit or if it refers to the susceptibility of a given passive oxide film breaking?
The reason for my confusion is due to PREN values being used to evaluate both...
Hey, guys.
Can someone tell me what alloy is used to make the nozzle pipes at the fuel pump? I've read that certain stainless steels are suitable for contact with stagnant gasoline (that gas tanks are sometimes made of stainless), but I've also read that Inconel is used for fuel nozzles. When I...
I understand that the presence of molybdenum in alloys contributes to greater corrosion resistance in that it "increases the lattice strain," thereby necessitating greater energy to dissolve the iron from the surface. However, what I'd like to know is whether the increase in corrosion resistance...
Hey, guys.
Would any of you happen to know what the accuracy tolerance is with modern XRF alloy scanners? Does it vary by brand? I read a brochure from Niton outlying their advances in the past century--heightened sophistication allowing a wider range of data processing, but it doesn't talk...
When strictly comparing the integrity of nickel and cobalt-based superalloys refined by either electroslag remelting or vacuum arc remelting (excluding triple-melting and powder processing), which is generally the better choice? My brief research showed reports arguing the benefits of both over...
Hey guys.
Can someone please tell me whether Carpenter's CCW alloy performs closer to Haynes Ultimet alloy or Stellite 6B? Its chemical composition is nearly identical to Ultimet, except for the fact that the tungsten content is what 6B has and there is a significant tantalum (though no...
Hey guys,
Can someone please tell me if there is any notable difference in the all-around performance between nickel alloys X-750 and 718? From the manuals I've read on the Special Metals website as well as numerous other articles, it seems to me like these two alloys are almost identical in...
Hey, guys.
Just have a quick question about which of the following sulfidizing conditions is more severe:
Ar-5% H2-5% CO-1% CO2-0.15% H2S-0.1% H20 @ 1400° F
or
90% na2so4 + 10% kci @ 1600° F
Any clarification will be greatly appreciated.
Hello, everyone.
Would someone here happen to have data on the corrosion rate of annealed Nitronic 60 in either 10% or 20% sulfuric acid @ either 80° C or boiling? The information on metal supplier brochures only specify the 2% and 5% @ 80° C.
Any input is greatly appreciated.
