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molten salt corrosion

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080409
EISBN: 978-1-62708-304-1
... Abstract Containment materials used in power generating applications are subject to molten salt corrosion. This chapter reviews the data relevant to corrosion problems in molten salt environments. It describes the corrosion behavior of steel, aluminum, nickel, and titanium alloys in molten...
Image
Published: 01 November 2007
Fig. 15.10 Corrosion of Ni-Cr-Fe-Mo alloy in a molten CaCl 2 -NaCl salt bath at 570 °C (1050 °F) for 6 months. (a) Little corrosion at the area not cold worked (away from the sheared edge). (b) Intergranular attack at the cold worked area (specimen sheared edge). Source: Ref 14 More
Image
Published: 01 November 2007
Fig. 10.61 Tube wastage as a function of tube metal temperature after 125,000 h, with low wastage rate by oxidation and accelerated wastage rates by molten salt corrosion. Source: Ref 15 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080001
EISBN: 978-1-62708-304-1
... and metal dusting Corrosion by halogen and hydrogen halides Sulfidation Hot corrosion Molten salt corrosion Liquid metal corrosion and embrittlement Erosion and erosion/corrosion Stress-assisted corrosion and cracking Hydrogen attack Coal-fired boilers Oil-fired boilers...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080335
EISBN: 978-1-62708-304-1
.... 12.10 shows that there are many low-melting salts, particularly metal chlorides, that can become molten at the operating temperatures of furnace walls and superheaters. The type of chloride that forms on the deposit, as well as the type of the corrosion products formed between the chloride deposit...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900201
EISBN: 978-1-62708-350-8
... ). Melonite Process The Melonite process, also known as Meli 1, uses a molten salt bath of a special composition. It provides a wear- and scuff-resistant surface on steels, sintered irons, cast irons, and similar materials. Treated parts exhibit excellent wear and corrosion resistance and good sliding...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900053
EISBN: 978-1-62708-350-8
... source. When heat is applied from either an internal or external source, the salt melts and liberates nitrogen to the steel for diffusion. When a steel workpiece is introduced into the salt and heated up to a temperature in the molten salt, similar reactions begin to occur as in gas nitriding...
Image
Published: 01 November 2007
Fig. 15.9 Corrosion attack consisting of voids in a nickel-base alloy after 2 months at 870 °C (1600 °F) in a molten BaCl 2 salt bath. Source: Ref 13 More
Image
Published: 01 November 2007
Fig. 15.11 Corrosion rates of various alloys as a function of nickel content in the alloy tested in molten NaNO 3 -KNO 3 salt at 675 °C (1250 °F). Source: Ref 23 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900193
EISBN: 978-1-62708-350-8
... ). Corrosion Resistance After ferritic nitrocarburizing, steel parts can withstand many hours in a salt spray environment, whereas an untreated plain carbon steel will fail the corrosion test very rapidly. Low Distortion Another major advantage of the ferritic nitrocarburizing process...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350231
EISBN: 978-1-62708-315-7
... with sulfur com- pounds and other contaminants, such as chlorides, to form a molten salt on a metal surface that fluxes, destroys, or disrupts the normal protec- tive oxide. See also gaseous corrosion. hot dip. Covering a surface by dipping the surface to be coated into a molten bath of the coating material...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.9781627083157
EISBN: 978-1-62708-315-7
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090271
EISBN: 978-1-62708-266-2
... subcritical cracking behavior in titanium alloys is generally observed, such that no exact, well-defined crack threshold stress level can be identified. These environments include certain liquid and solid metals, dry methanol, molten halide salts, and hot halide salt residues. Table 10.2 provides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080249
EISBN: 978-1-62708-304-1
... believed that the molten sodium sulfate Calcium 884 deposit is required to initiate hot corrosion attack. Potassium 400 The temperature range for hot corrosion attack, Beryllium 380 65 Source: Ref 2 250 / High-Temperature Corrosion and Materials Applications mechanism by salt uxing has been discussed data...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.9781627083041
EISBN: 978-1-62708-304-1
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030025
EISBN: 978-1-62708-282-2
... environments and beneath molten-salt deposits have been determined in recent years. In the majority of environments encountered in practice by oxidation-resistant alloys, Al 2 O 3 or Cr 2 O 3 should form in preference to any sulfides, and destructive sulfidation attack occurs mainly at sites where...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280287
EISBN: 978-1-62708-267-9
... was oxidized. V 2 O 5 and vanadates, formed by reaction between salts and V 2 O 5 condensed as liquids, were catastrophically corrosive. Other problems were encountered when superalloys in gas turbines intended for marine use interacted with sulfur and salt to produce unexpected degradation by a process...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120085
EISBN: 978-1-62708-269-3
... of scale and how it can be removed via belt grinding, abrasive blasting, and molten salt descaling baths. It also discusses the role of acid pickling, barrel finishing, polishing, and buffing as well as the use of chemical conversion coatings and protective platings. barrel finishing chemical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440055
EISBN: 978-1-62708-262-4
... is the immersed electrode salt bath or a fluidized bed. While all three modes of heating are utilized in a molten salt, molten metal bath, or a fluidized bed, conduction plays an important role because the hot medium is in direct contact with the work-metal surfaces. Convection Convection involves...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080423
EISBN: 978-1-62708-304-1
... Abstract Liquid metals are frequently used as a heat-transfer medium because of their high thermal conductivities and low vapor pressures. Containment materials used in such heat-transfer systems are subject to molten metal corrosion as well as other problems. This chapter reviews the corrosion...