I. Rommerskirchen et al., Effect of semi-finished products on the corrosion resistance of high-alloyed Ni-Cr-Mo materials, MATER CORRO, 52(8), 2001, pp. 625-628
The corrosion resistance of different semi-finished products of six superau
stenitic steels and nickel based alloys in the condition of delivery was in
vestigated in some typical standard corrosion tests. The resistance of shee
ts, plates, strips, seamless tubes and welded tubes to intercrystalline cor
rosion was tested according to ASTM G 28 methods A and B, as well the resis
tance to pitting corrosion according to ASTM G 48 method C. The nickel base
d alloys 625, C-276 and alloy 59 are resistant to the FeCl3-test according
to ASTM G 48 method C and therefore a differentiation of these types in reg
ard to their localized corrosion resistance was achieved only in the more a
ggressive 'Green-Death'-solution. The laboratory experiments confirmed that
the corrosion resistance is identical for all semi-finished products and t
hat it shows only a slight dependence of the surface condition of the mater
ials tested. Additionally, some typical industrial and practical applicatio
ns of the six high performance materials are presented to demonstrate the e
xcellent corrosion resistance in the manufactured condition.