many of the pump OEM's advertise upgrades to OH2 pumps in refinery and chemical applications to improve MTBR and as a way to install a low emmsions mechnical seal. They say that MTBR improves becasuse of lower shaft deflection (stiffer shaft) and maybe larger bearings, but I am wondering if...
for carbon steel, boron diffusion alloying (nicknamed TMT) changes the surface microstructure ~.011 to produce a homogenous depth throughtout the part (except where you mask it off). It is a heat treating process and many refinery customers use for erosion/corrosion protection in that service...
