Alloy B-10, a new nickel-based alloy for strong chloride-containing, highly acidic and oxygen-deficient environments

Conference · Thu Dec 31 00:00:00 EST 1998

OSTI ID:350058

Kohler, M; Kirchheiner, R; Stenner, F ^[1]

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1. Krupp VDM GmbH, Werdohl (Germany)

Alloy B-10 is a Ni-Mo-Cr alloy, recently developed for highly acidic but oxygen-deficient environments in the chemical process and environmental protection industries. The new nickel-based alloy with nominally (wt. %) 62 Ni, 24 MO, 8 Cr and 6 Fe, exhibits excellent corrosion resistance in intermediate concentrations of sulfuric acid, as well as in hydrochloric acid, even with additions of small amounts of oxidizing agents. In a simulated Flue Gas Desulfurization (FGD) environment of sulfuric acid of pH 1 with additions of 7% chloride and 0.01% fluoride, and also containing 15% gypsum the new alloy demonstrated high crevice corrosion resistance at 100 C, whereas a common Ni-Cr-Mo alloy of the C-type suffers crevice corrosion under the same conditions. This new alloy can easily be welded without filler or using matching filler. Good practical experience has been gained with Alloy B-10 in a district heating power station as a tube sheet and bottom wall liner for a glass tube heat exchanger working at 130 C with condensing 70% sulfuric acid.

• OSTI ID: 350058
• Report Number(s): CONF-980316-; TRN: IM9925%%406
• Resource Relation: Conference: Corrosion `98, San Diego, CA (United States), 22-27 Mar 1998; Other Information: PBD: 1998; Related Information: Is Part Of Corrosion `98: 53. annual conference and exposition, proceedings; PB: [6600] p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
01 COAL, LIGNITE, AND PEAT
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
NICKEL BASE ALLOYS
MOLYBDENUM ALLOYS
CHROMIUM ALLOYS
SULFURIC ACID
HYDROCHLORIC ACID
CORROSIVE EFFECTS
CORROSION RESISTANCE
FLUE GAS
DESULFURIZATION
CREVICE CORROSION
USES
DISTRICT HEATING
CENTRAL HEATING PLANTS