1-20 of 56 Search Results for

organic acid cleaning

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
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
... that of an organic coating, conversion coatings treatment often precedes the application of organic coatings to enhance overall corrosion resistance. Proper cleaning of the base metal is essential to ensure this continuous coverage. Accelerated tests are performed when an expedited answer is needed to solve...
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
.... Contaminated units are usually cleaned with noncorroding, inhibited acid solutions. Leaks developed in a large heat exchanger's tubes several months after the unit had undergone just such a routine cleaning. The heat exchanger had been in service for about six years. Failed tubes were plugged...
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
... to reduce thiosulfate to sulfide. 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...
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
... 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 present in the process stream. Circumstances Leading to Failure...
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: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006788
EISBN: 978-1-62708-295-2
... with the abundance of sulfate-reducing bacteria in soils along a buried pipeline Factor Range Correlation coefficient Number of acid-producing bacteria (a) , cells/g soil 10 3 –10 8 +0.829 Total organic carbon in groundwater, % 0.05–1.2 +0.645 Soil resistivity, Ω · cm 500–30,000 −0.642...
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
... acid functionality, such as fumaric acid. Organic acid functionality is known to form upon the degradation and decomposition of polymer materials. Thus, the FTIR analysis suggested that the exterior surfaces of the brackets were in a degraded state relative to the core material. Fig. 8 A Fourier...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003522
EISBN: 978-1-62708-180-1
..., nonscratching brush Washing with organic solvents Use of an ultrasonic cleaning bath and appropriate solvents. The use of an ultrasonic cleaning bath is very useful in speeding up the cleaning process. Use of a mild acid or alkali, depending on the metal. A solution that attacks the deposits...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006757
EISBN: 978-1-62708-295-2
... by sunlight. Absorption of energy can cause reduction in polymer molecular weight because of rupture of main chain molecules, formation of cross links, and the formation of oxidized groups within the polymer. These effects reduce strength and increase brittleness. Organic liquids, such as cleaning fluids...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
... of stainless steels is the intentional forming of a complete exterior chromium trioxide (Cr 2 O 3 ) film by completely cleaning the surface and allowing oxygen to contact and react with the surface. In the common galvanic series, a noble position is assumed by stainless steels in the passive state, while...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... of obliterating debris and dirt, or to prepare the fracture surface for SEM examination. Other acceptable cleaning procedures include use of a dry-air blast or of a soft-hair artist's brush; treating with inorganic solvents, either by immersion or by jet; treating with mild acid or alkaline solutions (depending...
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
... is consistent with the presence of an acidic environment that developed as the result of biological activity on the coupling. The exact microbe was not identified but was an organism that metabolized the S in the MnS inclusions. Given that this pump was held in standby, the submerged couplings resided...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
... into a pitting mechanism if the microcells develop enough to produce acidic gradients within the micropits where the graphite nodules lie or are dislodged. The uniform corrosion occurring by the microelectrolytic or galvanic cell in the ductile cast iron is shown in Fig. 8 . Observe the initial stages...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001816
EISBN: 978-1-62708-180-1
... in steam demand, composition of fuel, amount of excess combustion air, type and amount of water-conditioning chemicals added, type and amount of contaminants in condensate and make-up feedwater, frequency and methods of cleaning fire-side and water-side surfaces of steam generators, materials specified...
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
.... , Kreig N.R. , Sneath P.H.A. , Stanely J.T. : In: Williams S.T. (ed.) Bergey’s Manual of Determinative Bacteriology . Williams and Wilkins , Baltimore ( 1994 ) 23. Marmur J. : A procedure for the isolation of deoxyribonucleic acid from micro-organisms . J. Mol. Biol...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001129
EISBN: 978-1-62708-214-3
... the bolster was in storage, necessitating cleaning in hydrochloric acid prior to examination. Two distinct regions were noted, one being darker than the other. A heavy coating of epoxy paint was stripped, and rough grinding near what appeared to be a fatigue failure was revealed. Figures 1 , 2 , 3 , 4...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001808
EISBN: 978-1-62708-241-9
... does not avoid MIC-related problems [ 1 ]. However, by using more resistant materials and implementing proper operating conditions, MIC-related problems can generally be alleviated. Even when using resistant material, the piping should be kept relatively clean with non-stagnant conditions. Bacteria...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006825
EISBN: 978-1-62708-329-4
... Schematic showing temperature profile across the thickness of a clean tube and a tube having internal scale deposits Fig. 69 Photograph of failed boiler tube showing polishing of the outer surface Fig. 66 Photograph of soot-blower erosion on outer surface of water-wall tube Fig...
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
... 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 with the relatively small amount of antifreeze...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... ∼6 mm. (b) Enlarged view of the cracks; 10% oxalic acid electrolytic etch, picture width ∼1.5 mm. Courtesy of Mohan Chaudhari, Columbus Metallurgical Services Preconditions leading to SCC include a variety of materials conditions such as tensile residual stresses, work hardening, surface...