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hot 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
... and water vapor in the molten salt thus often accelerate molten salt corrosion. Corrosion can also take place through mass transfer due to thermal gradient in the melt. This mode of corrosion involves dissolution of an alloying element at hot spots and deposition of that alloying element at cooler...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080249
EISBN: 978-1-62708-304-1
... melting temperature of the salt deposit, and the upper temperature is the salt dew point ( Ref 3 ). This type of corrosion process is sometimes referred to as Type I hot corrosion to differentiate it from Type II hot corrosion, which occurs at lower temperatures (typically 670 to 750 °C, or 1240 to 1380...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090271
EISBN: 978-1-62708-266-2
... composition, designation, and grade of nearly two dozen commercial titanium alloys and the different types of media (including oxidizers, organic compounds, hot salt, and liquid metal) in which SCC has been observed. It discusses the mechanical and metallurgical factors that influence SCC behavior and...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090303
EISBN: 978-1-62708-266-2
... 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910427
EISBN: 978-1-62708-250-1
... Nonoxidizing electrolyte or hot gases General Easy Simple Sentinel holes Slow Go/no-go remaining thickness Poor Any (gas or vapor preferred) General Easy Relatively simple Radiography Relatively slow Distribution of corrosion Poor Any Pitting, possibly cracking Easy Simple, but...
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 isothermal. Figure 13.4 shows isothermal weight change data plotted for several nickel-base superalloys as a function of exposure time. This test actually incorporated sulfur and salt to simulate hot corrosion effects, and shows the form of such plots. Fig. 13.4 Specimen weight change...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.9781627083003
EISBN: 978-1-62708-300-3
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030025
EISBN: 978-1-62708-282-2
... burning liquid fuels can be described as type I hot corrosion, which occurs primarily in the metal temperature range of 850 to 950 °C (1550 to 1750 °F). This is a sulfidation-based attack on the hot gas path parts involving the formation of condensed salts, which are often molten at the turbine operating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910363
EISBN: 978-1-62708-250-1
... panels Aluminum coated Continuous hot-dip coat, cold-rolled sheet steel. Surface properties equivalent to aluminum Exhaust systems, catalytic converters, chassis components Aluminum-zinc coated Continuous hot-dip coat, cold-rolled sheet steel. Provides excellent corrosion resistance Exhaust...
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
... to corrosion. This type of failure of boiler tubes, is called hot corrosion ( Ref 6.32 ). Hot corrosion is thus a mode of damage in which metals and alloys experience accelerated oxidation or corrosion when their surfaces are coated by a thin film of fused salts (such as Na 2 SO 4 ) in an oxidizing...
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
... disadvantage of promoting hydrogen absorption, this can be overcome or minimized by chemical additions. Vacuum degassing is another solution to the hydrogen problem. A primary producer of titanium sheet uses an oxidizing salt bath for removing the hot-work scale in the following sequence of operations...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120123
EISBN: 978-1-62708-269-3
... or crack arrest. The mechanism varies slightly for hot salt stress-corrosion cracking (HSSCC). It is generally agreed that HSSCC stems from pyrohydrolytic formation of a hydrogen halide from its corresponding halide salt. This halide subsequently attacks the metal producing titanium chloride...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480331
EISBN: 978-1-62708-318-8
... ruthenium being particularly attractive because it is 7 times less expensive than palladium. Improved corrosion resistance is also achieved by adding a more noble metal (e.g., silver) and by adding compound formers that promote cathode reactions, such as nickel. Titanium corrodes slowly in hot caustic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030172
EISBN: 978-1-62708-282-2
... Distilled water exposed to acid gases 0.03–0.3 1.2–12 Hot deionized water (100 °C) (14 days stagnant immersion) 16 640 Hot deionized water inhibited with 0.25 NaF 5.5 × 10 −2 2.2 Seawater 0.25 10 3 M MgCl 2 solution 300 12 × 10 3 3 M NaCl (99.99% high-purity Mg with <10 ppm...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090443
EISBN: 978-1-62708-266-2
... for use of Mattissons solution of pH 7.2 to evaluate the stress-corrosion susceptibility of copper-zinc alloys. ASTM G41: Practice for determining cracking susceptibility of metals exposed under stress to hot salt environment. ASTM G44: Practice for exposure of metals and alloys by alternate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.9781627083027
EISBN: 978-1-62708-302-7
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870219
EISBN: 978-1-62708-299-0
... specimen, but flat panels usually are used when pitting evaluation is the principal purpose of the test ( Ref 2 ). Tests/environments frequently used to determine susceptibility to pitting corrosion include the following: A neutral 5% sodium chloride (NaCl) salt spray described in ASTM B 117, “Test...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
... contribution of mechanical action is quite small. All types of corrosive media generally can cause erosion-corrosion, including gases, aqueous solutions, organic systems, and liquid metals. For example, hot gases may oxidize a metal then at high velocity blow off an otherwise protective scale. Solids in...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870161
EISBN: 978-1-62708-299-0
... produce slightly different electrode potentials in the presence of various solutions. Selective corrosion can result in immersed service, where the vase alloy and weld metal possess significant differences in potential. Table 1 lists the solution potentials for common aluminum alloys in a salt solution...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870075
EISBN: 978-1-62708-299-0
... contaminated with mercury, the mercury can be removed by treatment with 70% nitric acid (HNO 3 ) or by evaporation in steam or hot air ( Ref 32 ). It is difficult to determine the safe level of mercury that can be tolerated on aluminum. In solutions, concentrations exceeding a few parts per billion should be...