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chemical inhibition

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001592
EISBN: 978-1-62708-228-0
... chemical inhibition program. Carbon steel is preferred over other materials due to its machinability, high strength, and low cost. The use of carbon steel rod strings in aggressive environments, without properly considering the complex interactions between the material and its service environment...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001044
EISBN: 978-1-62708-214-3
... Abstract Inhibited admiralty brass (UNS C44300) condenser tubes used in a natural-gas-fired cogeneration plant failed during testing. Two samples, one from a leaking tube and the other from an on leaking tube, were examined. Chemical analyses were conducted on the tubes and corrosion deposits...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091727
EISBN: 978-1-62708-217-4
... the importance of trace chemicals in accelerating or inhibiting a failure. It also points out that test fixture materials can affect test results. Although it is preferable to use fixtures of the same alloy, it may not always be critical in the screening of possible stress-corroding fluids, because it is often...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0091699
EISBN: 978-1-62708-219-8
... Abstract Eddy-current inspection was performed on a leaking absorber bundle in an absorption air-conditioning unit. The inspection revealed crack-like indications in approximately 50% of the tubes. The tube material was phosphorus-deoxidized copper. Investigation (visual inspection, chemical...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091726
EISBN: 978-1-62708-217-4
... expulsion bladder. Investigation (visual inspection, pressure testing of 10 similar vessels, and chemical testing of the N2O4) supported the conclusion that the failure was due to stress corrosion from the N2O4, and specifically from a specification change in the military specification MIL-P-26539...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001167
EISBN: 978-1-62708-228-0
... area as Fig. 3 , after chemical stripping, showing (arrowed) two separate initiation sites. Sections of the fracture surface were examined in the scanning electron microscope after chemical stripping of the corrosion products with a solution 50 50 HCl/water inhibited with hexamine...
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
... of additives. This article is divided into five sections: mechanical property modifiers, physical property modifiers, biological function modifiers, processing aids, and colorants. It describes three classes of additives that are used to inhibit biological activity, six classes of mechanical property modifiers...
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
... in chemical process streams. All of the above reactions are quite similar; they consume electrons. The above partial reactions can be used to interpret virtually all electrochemical corrosion problems. Consider what happens when iron is immersed in water or seawater that is exposed to the atmosphere...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001521
EISBN: 978-1-62708-229-7
..., to determine which contained the least-harmful corrosive chemicals. Chlorides Heat exchangers Seamless tubes Turbogenerators C44300 UNS C44300 Stress-corrosion cracking Introduction The 1996 Jacquet Lucas Award for Excellence in Metallography was won by Samuel J. Lawrence and Richard L...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001133
EISBN: 978-1-62708-214-3
... in accordance with ASTM F-75. Table 1 gives the chemical composition requirements of ASTM F-75. Many prostheties are coated with a porous surface to provide locations for bond ingrowth and attachment. A high-strength bond between the porous coating and the implant is required for proper implant attachment...
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
... the corrosion to an acceptable limit. Chemical processing equipment Sulfuric acid, environment UNS S31603 UNS N08020 316L 20Cb Uniform corrosion Background Neutralization tanks made of type 316L (UNS S31603) stainless steel became severely corroded in service, even though field corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001411
EISBN: 978-1-62708-234-1
..., and is accelerated by elevated temperatures and low water velocities. It is believed that, in the initial stages, solution of the copper-zinc alloy takes place, this being followed by a secondary reaction resulting in the elector-chemical redeposition of the copper. The net result of the process is that sound...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001706
EISBN: 978-1-62708-217-4
... on the steel substrate respectively. Application of a corrosion-inhibiting compound (CPC) on top of the painted surfaces would ensure additional protection against moisture and aggressive environment. Chemical analysis of the coatings at different locations on the inner and external surfaces of the beam...
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
... reactions and are most frequently found in chemical process streams. All the aforementioned reactions are quite similar: they consume electrons. The aforementioned partial reactions can be used to interpret virtually all electrochemical corrosion problems. Consider what happens when iron is immersed...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001354
EISBN: 978-1-62708-215-0
... examination. Under a low-power stereomicroscope (30×), the fracture surface could not be classified. It was covered with a thick, adherent black scale-characteristic of caustic-induced cracking. Scanning Electron Microscopy/Fractography The examined crack surfaces were cleaned using an inhibited add...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001060
EISBN: 978-1-62708-214-3
... the flange thickness. Chemical Analysis/Identification Material and Weld Chemical analysis of the flange, weld, and tapered section showed that they were within the compositional limits for type 316 stainless steel. Susceptibility to intergranular corrosion tests (sensitization) per ASTM A 262...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001386
EISBN: 978-1-62708-215-0
... of the hole. The balance of the fracture surface was typical of a brittle fracture ( Fig. 5 and 6 ). Fig. 5 Fracture surfaces of load cell, indicating brittle fracture Fig. 6 Fracture origin (top left corner) and fatigue region after cleaning in inhibited acid Corrosion Patterns...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001581
EISBN: 978-1-62708-235-8
... Background and Summary A catalyst basket used in a chemical process reactor distorted extensively during three years of service at 650 °C (1200 °F). The basket was fabricated from cold rolled Type 304 austenitic stainless steel profile wire. The cold worked wires recrystallized during service...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001771
EISBN: 978-1-62708-241-9
... in the inner wall of the radiant tube has a higher thermal expansion coefficient and tends to increase in volume and place stresses on the tube. These thermal stresses make the tube more susceptible to creep failure [ 3 ]. The deposition of the coke at high temperature is generally inhibited...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001075
EISBN: 978-1-62708-214-3
... mm (0.10 in.) in diameter. The chemical specification ( Table 1 ) of the Swedish steel from which the wires were made shows that they are basically a type 316L stainless steel. The wires were also specified to be “ 3 4 hard,” an imprecise indication of the amount of cold working required...