Investigation of high-temperature corrosion in an incinerator offgas system
Conference
·
OSTI ID:6187904
Corrosion studies have been carried out in the offgas system of a radioactive-waste incinerator at the Department of Energy's Savannah River Plant. Many advanced alloys exhibited severe corrosion and poor performance in the high-temperature region (>100/degree/C). The environment includes O/sub 2/, SO/sub 3/, P/sub 2/O/sub 5/ and HCl. Extensive corrosion for most alloys containing less than /approximately/25% Cr, and most iron-base materials were destroyed. An Fe-20Cr-5Al alloy had good appearance after exposure. Duplex chromium/aluminium diffusion coatings improve performance of substrate alloys having high Cr content. However, neither aluminizing nor chromizing alone provided sufficient benefit to warrant their use on the alloys examined. Carbon steel received no real long-term protection from either coating. Metallographic investigation indicates that reactions penetrate to substantial depths beneath the surface of most alloys. Where metal parts were cooled by air or water flow, corrosion was essentially eliminated. Thus, use of alloys with high chromium content (>30%), use of an iron-base alloy with aluminium plus chromium, application of duplex Cr/Al diffusion coatings on high-Cr materials, and application of water cooling to these high alloys each benefits reduction of high-temperature metallic corrosion in the incinerator offgas systems. 11 refs., 9 figs., 4 tabs.
- Research Organization:
- Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Plant
- DOE Contract Number:
- AC09-76SR00001
- OSTI ID:
- 6187904
- Report Number(s):
- DP-MS-88-54; CONF-890437-2; ON: DE89002885
- Country of Publication:
- United States
- Language:
- English
Similar Records
High-temperature corrosion in an incinerator offgas system
Evaluation of coated and clad heat exchangers for syngas coolers. Volume 2. Laboratory corrosion study of coated low-alloy steel tubes. [Low alloy steels such as T-11 (1-1/4% Cr-0. 5% Mo)]
Evaluation of coated and clad heat exchangers for syngas coolers. Volume 1. Evaluation of coating variability and weldability. [T-11 steel (1. 25 Cr-0. 05 Mo)]
Journal Article
·
Tue Oct 31 23:00:00 EST 1989
· Materials Performance; (USA)
·
OSTI ID:5327206
Evaluation of coated and clad heat exchangers for syngas coolers. Volume 2. Laboratory corrosion study of coated low-alloy steel tubes. [Low alloy steels such as T-11 (1-1/4% Cr-0. 5% Mo)]
Technical Report
·
Fri Jan 31 23:00:00 EST 1986
·
OSTI ID:6323586
Evaluation of coated and clad heat exchangers for syngas coolers. Volume 1. Evaluation of coating variability and weldability. [T-11 steel (1. 25 Cr-0. 05 Mo)]
Technical Report
·
Fri Jan 31 23:00:00 EST 1986
·
OSTI ID:6025481
Related Subjects
052002* -- Nuclear Fuels-- Waste Disposal & Storage
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COATINGS
COBALT ALLOYS
CORROSION
CORROSIVE EFFECTS
CRACKS
CRYSTAL STRUCTURE
FLUIDS
GASES
INCINERATORS
IRON ALLOYS
IRON BASE ALLOYS
LOW-LEVEL RADIOACTIVE WASTES
MATERIALS
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
OFF-GAS SYSTEMS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
WASTES
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COATINGS
COBALT ALLOYS
CORROSION
CORROSIVE EFFECTS
CRACKS
CRYSTAL STRUCTURE
FLUIDS
GASES
INCINERATORS
IRON ALLOYS
IRON BASE ALLOYS
LOW-LEVEL RADIOACTIVE WASTES
MATERIALS
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
OFF-GAS SYSTEMS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
WASTES