Flowserve Corporation has devoted more than 85 years to the development of alloys
and the production of equipment to provide long, trouble-free life when handling severe
corrosives. Pumps, valves, pipe, fittings, anodes, towers and various accessory castings
are among the equipment engineered and produced by Flowserve Corporation in various
nickel-base alloys, iron-base alloys, and reactive alloys.
The ratings listed in this bulletin represent the concentration and temperature at which
each alloy experiences 20 mpy corrosion or less in an uncontaminated environment,
unless otherwise indicated. Where applicable, localized forms of corrosion, such as pitting
and stress corrosion cracking, have been considered. However, many other factors must
be considered when selecting a material for a corrosive service. These include: primary
corrosive; secondary corrosive; contaminants; concentration; pH; maximum, minimum
and normal operating temperature; viscosity; velocity; solids in suspension; continuous
or intermittent operation; degree of aeration; type or design of equipment; and any other
peculiarities of the solution.
These ratings may be used as a guide in selecting materials for many Flowserve
product components, including pipe, casings, covers, impellers, and valve bodies. Critical
components such as plugs, shafts, and mag drive containment shells require lower rates
of corrosion. In these cases, we recommend consulting with the Flowserve Materials
The corrosion chart in this bulletin is intended to be a guide to the selection of the
proper corrosion resistant material for a given application. The ratings are not a blanket
recommendation or warranty, expressed or implied, for any of the materials for any
media. These ratings are the compilation of extensive laboratory and field tests, operating
experience and best judgement.