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polythionic acid corrosion

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Published: 01 December 2015
Fig. 29 Polythionic acid stress-corrosion cracking of roll-bonded type 304 (S30400) stainless steel cladding. Note that cracking stops at the type 304 (S30400) weld overlay around the nozzle opening. More
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Published: 01 December 2015
Fig. 30 Polythionic acid stress-corrosion cracking of type 304 (S30400) furnace tube near weld to carbon steel tube. Cracking is both parallel and perpendicular to weld but not in the weld. More
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Published: 01 December 2015
Fig. 31 Intergranular cracking typical of polythionic acid stress-corrosion cracking in type 304 (S30400) stainless steel. 75× More
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
... such as waterwall, fuel ash, and hot corrosion, acid dew-point or cold-end corrosion, and polythionic acid corrosion. It also addresses stress corrosion cracking and includes relevant case studies. acid dew point corrosion boiler tubes fire-side corrosion fuel ash corrosion hot corrosion polythionic acid...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090095
EISBN: 978-1-62708-266-2
..., polythionic acid, and high-temperature environments and the correlating effects on austenitic, ferritic, duplex, martensitic, and precipitation hardening stainless steels and nickel-base alloys. It also discusses the contributing effects of sensitization and hydrogen embrittlement and the role of composition...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430147
EISBN: 978-1-62708-253-2
...) Chelate corrosion Fire-side corrosion: Waterwall corrosion or reduced atmosphere corrosion Fuel ash corrosion Coal-ash corrosion Oil-ash corrosion Hot corrosion Acid dew point corrosion or cold-end corrosion SCC Polythionic acid stress-corrosion cracking (PASCC) Fire...
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 determining the susceptibility of stainless steel and related nickel-chromium-iron alloys to stress-corrosion cracking in polythionic acids. ASTM G36-94(2013) Standard practice for evaluating stress-corrosion cracking resistance of metals and alloys in boiling magnesium chloride solution. ASTM G123-00...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030292
EISBN: 978-1-62708-282-2
... to reduce the polythionic acid corrosion of flare-stack tips, as can be experienced with conventional stainless steels. The nickel-molybdenum alloys, such as alloy B-2 (N10665) and B-3 (N10675), are particularly well suited for handling hydrochloric acid at all concentrations and temperatures (including...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.9781627082662
EISBN: 978-1-62708-266-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310247
EISBN: 978-1-62708-286-0
... and the temperatures used may further aggravate that corrosivity. The aggressive chemical agents that refinery materials must withstand include wet hydrogen sulfide and carbon dioxide, napthenic acids, polythionic acids, chlorides, sulfuric acid, and alkalines as well as simple oxidation. Sometimes, temperatures...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090333
EISBN: 978-1-62708-266-2
.... Archer and McKim ( Ref 13.16 ) investigated the stress-corrosion behavior of amorphous Fe-40Ni-20B alloy in ferric chloride, polythionic acid, and hydrochloric acid by bend testing. In 0.39 M FeCl 3 at 30 °C (86 °F), the specimen surface became duller within 1 min, and after about 10 min, a number...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090135
EISBN: 978-1-62708-266-2
... that can cause stress-corrosion cracking of nickel and nickel-base alloys Table 5.1 Evolution of environments that can cause stress-corrosion cracking of nickel and nickel-base alloys Period Environments that can cause SCC Ca. 1950 H 2 O – HF Fluosilicic acid Ca. 1978 H 2 O – Cl...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940451
EISBN: 978-1-62708-302-7
... for Determining the Susceptibility of Stainless Steels and Related Nickel-Chromium-Iron Alloys to Stress-Corrosion Cracking in Polythionic Acids • G 36, Practice for Evaluating Stress-Corrosion Cracking Tests in a Boiling Magnesium Chloride Solution • G 37, Practice for Use of Mattsson’s Solution of pH...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030215
EISBN: 978-1-62708-282-2
... products. In this case, product purity, rather than corrosion rate, is the prime consideration. One example is storage of 93% sulfuric acid (H 2 SO 4 ) in plain carbon steel at ambient temperature. The general corrosion rate is 0.25 mm/yr (10 mils/yr) or less, but traces of iron impart a color...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310027
EISBN: 978-1-62708-286-0
... are atmospheric and marine environments and chemical environments such as sulfuric acid, phosphoric acid, nitric acid, strong bases, and organic acids, such as acetic and formic. Pickling is an example of controlled, accelerated uniform corrosion. This is typically done with 10 to 20% hot sulfuric acid...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090419
EISBN: 978-1-62708-266-2
... • • Ferrous chloride • • Fluosilicic acid • • • • Gasoline vapor • Glutamic acid • • Glycerol • Hexachloroethane • • Polythionic acid • Potassium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910099
EISBN: 978-1-62708-250-1
... exposed to hydrochloric acid during a plant upset. Note how pits intersect to form areas of jagged metal loss. A steel probe tip is also shown in the photo. Source: Nalco Chemical Company Despite their good resistance to general corrosion, stainless steels are more susceptible to pitting than many...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
.... Corrosive Conditions If oxygen and water are both present, corrosion will normally occur on iron and steel. Rapid corrosion may take place in water, the rate of corrosion being accelerated by several factors such as: (a) the velocity or the acidity of the water, (b) the motion of the metal, (c...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170495
EISBN: 978-1-62708-297-6
... freshwaters, and in deaerated nonoxidizing acids, and it has excellent resistance to corrosion by caustic alkalies. Therefore, nickel offers very useful corrosion resistance, and it is an excellent base on which to develop specialized alloys that can capitalize on the unique properties of specific alloying...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200274
EISBN: 978-1-62708-354-6
...-containing austenitic grades of the CF type. The high-chromium CC50 alloy has good resistance to oxidizing corrosives, mixed nitric and sulfuric acids, and alkaline liquors. It is used for castings in contact with acid mine waters and in nitrocellulose production. For best impact strength, the alloy is made...