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fused salt corrosion

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Published: 01 November 2007
Fig. 12.9 Maximum thickness loss of corrosion probes exposed at metal temperature 550 °C (1020 °F) for 3000 h in WTE boilers as a function of the sum of heat of fusion (corresponding to the amount of fused salt) of the deposits. The open data points are Type 347H, and the solid data points More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090303
EISBN: 978-1-62708-266-2
..., and strain rate affect the SCC behavior of zirconium and its alloys. It describes environments known to induce SCC, including aqueous solutions, organic liquids, hot and fused salts, and liquid metals. It also discusses cracking mechanisms and SCC prevention and control techniques. stress-corrosion...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080335
EISBN: 978-1-62708-304-1
... deposits melt at around 380 and 500 °C (715 and 930 °F). In the deposits collected from the 3000 h exposure tests, sulfur (as SO 3 ) as high as about 40% and chlorine as high as 9%, along with Na, K, Pb, and Zn were detected. The authors observed that the corrosion attack increased with higher fused salt...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080321
EISBN: 978-1-62708-304-1
... formed on the metal, thus causing rapid corrosion attack. The corrosion mechanism is essentially hot corrosion involving a fused salt in an oxidizing environment. The hot corrosion mechanism involving fused Na 2 SO 4 has been extensively studied in high-temperature corrosion of gas turbine components...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350125
EISBN: 978-1-62708-315-7
... of the paint film or allow corrosion to progress beneath the paint film and cause it to fail prematurely. The principle surface contaminants that adversely affect the performance of paint films include oils, greases, dirt, rust, mill scale, water, and salts such as chlorides and sulfides...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350183
EISBN: 978-1-62708-315-7
...) or sacrificial protection (e.g., zinc and aluminum coatings). As described in Chapter 2 , the corrosion resistance of these coatings is often determined by accelerated laboratory tests. Table 2 lists the results of the neutral salt-spray (fog) test described in ASTM B 117 on substrate and coating materials...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090271
EISBN: 978-1-62708-266-2
... Abstract Titanium alloys are generally resistant to stress-corrosion cracking (SCC), but under certain conditions, the potential for problems exists. This chapter identifies the types of service environments where titanium alloys have exhibited signs of SCC. It begins by describing the nominal...
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
... by directing an air- ejected chemical emulsion containing fine abrasives against the surface to be finished. 246 / Surface Engineering for Corrosion and Wear Resistance liquid nitriding. A method of surface hardening in which molten nitrogen-bearing, fused-salt baths containing both cyanides and cyanates...
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: 30 April 2024
DOI: 10.31399/asm.tb.phtpp.t59380153
EISBN: 978-1-62708-456-7
... of the compound layer and thus can be relevant for wear (and corrosion) properties. These processes may be accomplished using a gas, vacuum, or salt media. In addition to the conventional gas nitriding processes, some proprietary gas nitriding and nitrocarburizing processes have achieved considerable...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240395
EISBN: 978-1-62708-251-8
.... 21.3.2 Liquid Carburizing Liquid carburizing is carried out in a bath of fused salt containing 20 to 50 wt% sodium cyanide, up to 40 wt% sodium carbonate, and varying amounts of either sodium or barium chloride. The bath temperature ranges from 870 to 955 °C (1600 to 1750 °F). Carburization time...
Book Chapter

By Kenneth A. Walsh
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230001
EISBN: 978-1-62708-298-3
... molten beryllium and sodium chloride salt-mix is a low-temperature commercial process. Conversion of beryl ore into beryllia precedes the fused salt electrolysis, and several purification techniques are followed to produce high-purity beryllium metal. A new modified beryllium chloride-beryllium...
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
... they contain oxidizing agents, the effect of these materials is not as aggressive as it is in the high-temperature fused salts. Consequently, organic materials are not destroyed, but they are saponified and absorbed. Silicate barrier films and molybdenum disulfide are soluble in these low-temperature salts...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060369
EISBN: 978-1-62708-261-7
... Abstract Corrosion can be defined as a chemical or electrochemical reaction between a material and its environment that causes the material and its properties to degrade. In most cases, it refers to the electrochemical oxidation of metals accompanied by the production of oxides or salts...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350095
EISBN: 978-1-62708-315-7
... for the different conversion coatings generally increases with coating weight, and the upper limit of the coating weight is determined by the process limitations or by the color requirement. Table 2 lists typical corrosion data measured by the ASTM B 117 method. Typical salt-spray data for chromate coatings...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430290
EISBN: 978-1-62708-253-2
... and become partially fused because they contain alkali metals such as sodium and potassium. The deposited salt forms a film on the surface of the tube, which destroys the protective magnetite layer of the tube surface by fluxing with it, leading to corrosion. This type of failure of boiler tubes, is called...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280203
EISBN: 978-1-62708-267-9
... of maintaining the bath during idle time. The electrolytic salt bath used to descale heat-resistant alloys contains fused caustic soda rather than sodium hydride. The parts and the tank are alternately negative and positive poles of a direct current circuit. This fused caustic soda bath, which contains...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230071
EISBN: 978-1-62708-298-3
... included among the rejected candidates are potassium acid sulfate, potassium acid fluoride, sodium, carbonate, and others. The search for less expensive sources of alkali led to the lime fusion process of Bayliss and Derry [1963] . The addition of large amounts of CaCO 3 to beryl before fusing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090419
EISBN: 978-1-62708-266-2
... Abstract This chapter describes nondestructive evaluation (NDE) test methods and their relative effectiveness for diagnosing the cause of stress-corrosion cracking (SCC) service failures. It discusses procedures for analyzing various types of damage in carbon and low-alloy steels, high-strength...