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organic acids

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001013
EISBN: 978-1-62708-234-1
... carbon dioxide dissolved in water condensed from the gas stream, with organic acids possibly an aggravating factor. A gas analysis showed no other corrosive agents. No metallurgical or fabrication defects were found in the carbon steel part. The mode of attack was corrosion-erosion, caused...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001627
EISBN: 978-1-62708-222-8
... and salts of organic acids, in addition to hydroxyl functionality. The discoloration was caused by localized rusting of the sink from prolonged exposure to a chloride containing substance. The appearance suggests that the substance may actually have been a drop of perspiration (sweat) from a factory worker...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003556
EISBN: 978-1-62708-180-1
.... These organic-acid-producing organisms could generate a corrosion cell based on iron sulfide but would not show up in SRB assays based on sulfate reduction. Corrosion by Microbially Produced Manganese (IV) Recent work has shown that microbially produced MnO 2 can corrode ( Eq 9 ) steel, provided...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001767
EISBN: 978-1-62708-241-9
... indicated absorption bands consistent with an ABS resin. However, the bracket surface material exhibited additional absorbances consistent with organic acid functionality, such as fumaric acid. Organic acid functionality is known to form upon the degradation and decomposition of polymer materials. Thus...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006766
EISBN: 978-1-62708-295-2
..., impactors, or denuders ( Ref 4 ). Corrosion investigations benefit from IC analysis. Suspected corrosive materials and corrosion products can be analyzed to determine the amounts of corrosive anions and weak organic acids. Material to be tested is extracted with deionized water, and the extract...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006788
EISBN: 978-1-62708-295-2
.... Chemical Microbiologically Influenced Corrosion—Production of Corrosive Metabolites Organic Acids Acid-producing bacteria (APB) and organic acids were identified in external corrosion sites in an extensive Gas Research Institute program on pipeline MIC in the early 1990s. This drew the attention...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001394
EISBN: 978-1-62708-234-1
... Abstract A 1-in. diam pump spindle fractured within the length covered by the boss of the impeller which was attached to the spindle by means of an axial screw. The pump had been in use in a chemical plant handling mixtures of organic liquids and dilute sulfuric acid having a pH value of 2 to 4...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001769
EISBN: 978-1-62708-241-9
... with algae or cyanobacteria in primarily aqueous environments such as marine and/or freshwater [ 35 ]. The calcium-accumulating process is based on metabolic utilization of organic acids as their role as source of carbon and energy. Such acids include acetate, citrate, oxalate, glyoxylate, succinate...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006926
EISBN: 978-1-62708-395-9
... stress of the swollen material due to plasticization. This is also supported by the results for other glassy polymers ( Ref 30 , 36 ). Destruction of Hydrogen Bonding Some organic acids can disrupt hydrogen bonding between the macromolecular chains in bulk polymers ( Ref 36 ). Solvent molecules...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001070
EISBN: 978-1-62708-214-3
... (20,000 gal) tanks. The process involved acidification of an aromatic organic sodium salt with sulfuric acid at 80°C (175°F) to pH 2.0. Lead was an undesirable material for this application, because it creeps under its own weight at 80°C (175°F). A rack of corrosion test coupons was installed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... of hydrogen gas according to Eq 4 . This also applies to corrosion in other acids such as sulfuric, phosphoric, hydrofluoric, and water-soluble organic acids such as formic and acetic. In each case, only the hydrogen ion is active, the other ions such as sulfate, phosphate, and acetate do not participate...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001066
EISBN: 978-1-62708-214-3
... steel spool piece lined with Teflon was one of many removed from a sulfuric acid denitrification system because of leaking or suspected leaking. The line contained 72% H 2 S0 4 at a temperature of 175 °C (350 °F). Less than 100 ppm of nitrogen-containing organic species and 50 ppm of HNO 3 also were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001648
EISBN: 978-1-62708-234-1
.... Generally, when an organism is involved, the tendency is for that organism to attach itself and grow on the surface of the affected object, forming colonies. 5 Associated with the presence of these colonies is biological activity. An example of such an activity would be the production of an acid...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001420
EISBN: 978-1-62708-220-4
..., the result being as follows: Apart from the local spots of corrosion due to the presence of the lining, the inner surface of the basket showed evidence of slight general corrosion, this being attributable to the action of organic acids known to be present in the material being centrifuged. The outer...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001063
EISBN: 978-1-62708-214-3
... Abstract Several tubes in a 35 m 2 (115 ft 2 ) type 316 stainless steel shell-and-tube condenser leaked unexpectedly in an organic chemical plant that produces vinyl acetate monomer. Leaks were discovered after 5 years of operation and relocation of the condenser to another unit in the same...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001545
EISBN: 978-1-62708-236-5
.... Failure was actually caused by overload. Had the original conclusion been accepted, a relatively exotic alloy would have been specified. In another case, brass heat exchanger tube failure was automatically attributed to attack by an acidic cleaner, and a decision was made to stop using the solution...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001338
EISBN: 978-1-62708-215-0
... indefinitely. Breakdown of inhibition, usually by oxidation processes, can result in the formation of ammonia or weak organic acids, both of which are corrosive to copper. Additionally, the coils would be full of air at the time they were sealed so that there would be an excess of available oxygen compared...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
... is the evolution of hydrogen gas according to Eq 4. This also applies to corrosion in other acids, such as sulfuric, phosphoric, and hydrofluoric, and water-soluble organic acids, such as formic and acetic. In each case, only the hydrogen ion is active; the other ions, such as sulfate, phosphate, and acetate, do...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006939
EISBN: 978-1-62708-395-9
...-tuning the surface chemistry of these layered silicates through ion-exchange reactions with organic and inorganic cations ( Ref 34 ). The physical mixing of natural layered silicates and elastomers can lead to an immiscible multicomponent system with no enhancement in the material property. The pristine...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006945
EISBN: 978-1-62708-395-9
... bismaleimide Building Of cials and Code Administrators bisphenol A benzophenonetetracarboxylic dianhydride acid cellulose acetate cellulose-acetate-butyrate cellulose-acetate-propionate compact disk carbon ber-reinforced plastic cellulose nitrate coordination number chloroprene rubber Canadian Standards...