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corrosion inhibitors

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Published: 15 January 2021
Fig. 8 Increase in corrosion rate for steel treated with a corrosion inhibitor in carbon-dioxide-saturated 3% saline solution with addition of acetate. Source: Ref 52 . Reprinted with permission from NACE International More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c0047328
EISBN: 978-1-62708-231-0
... that the vibrational stresses had a greater share in the damage than the corrosive influence. Cracks appeared initially only in those engines in which no corrosion inhibitor had been added to the cooling water. The cracking was caused by corrosion fatigue. The combined presence of a corrosive medium and cyclical...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0006417
EISBN: 978-1-62708-234-1
.... The possibility that the corrosion products would eventually create a blockage of the affected hole was great considering the small hole diameter (4.2 mm, or 0.165 in.). It was recommended that a quick fix to stop the corrosion would be to apply a corrosion inhibitor inside the hole. This, however, would cause...
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
... Abstract A wall section of a carbon steel choke body in gas service at 4400 psig blew out three months after the use of a corrosion inhibitor was stopped. Corrosion damage occurred in ripples, leaving both smoothly polished and unattacked areas. The corrodent in condensate wells was principally...
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
... the degradation of various protective systems, such as corrosion inhibitors and lubricants. The article describes the failure analysis of steel, iron, copper, aluminum, and their alloys. It also discusses the probes available to monitor conditions relevant to MIC in industrial systems and the sampling...
Image
Published: 01 January 2002
Fig. 6 Initial corrosion rates for steel exposed to carbonated 3% NaCl solution with 0, 100, and 1000 ppm acetate of 4, 9, and 18 mm/year (0.2, 0.4, and 0.7 in./year), respectively. This order is sustained after addition of 25 ppm of a corrosion inhibitor, despite a significant reduction More
Image
Published: 15 January 2021
for the match (DB, sublibrary; FX, food additives), and the spectrum identification number (ID) in the database. During the investigation, it was determined that the contamination was likely due to either a cleaning solution or corrosion inhibitor. Courtesy of P. Howard, NASA More
Image
Published: 01 January 2002
Fig. 31 Corrosion of type 304 steel in inhibited boiling 10% (H 2 SO 4 ). Inhibitor: 0.47 g Fe 3+ /L of solution added as Fe 2 (SO 4 ) 3 . Source: Ref 30 More
Image
Published: 15 January 2021
Fig. 31 Corrosion of type 304 steel in inhibited boiling 10% (H 2 SO 4 ). Inhibitor: 0.47 g Fe 3+ /L of solution added as Fe 2 (SO 4 ) 3 . Source: Ref 30 More
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 the environment; change in the alloy or heat treatment; change in design; use of galvanic protection; use of inhibitors; use of nonmetallic coatings and liners; application of metallic coatings; use of surface treatments, thermal spray, or other surface modifications; corrosion monitoring; and preventive...
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
... as corrosion inhibitors. The results of the examination indicated that the absorber tubes failed by stress-corrosion cracking initiated by ammonia contamination in the lithium bromide solution. Cracking was from the shell side or outer surface of the tubes, where the tubes were in contact with nitrate...
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
..., bacteria control by free chlorine between 0.2 and 0.5 ppm, and corrosion inhibitor orthophosphate between 10 and 20 ppm. An internally and externally rifled copper tube chiller contained the treated gray water for 4 years of service before a failure occurred. A refrigerant was on the shellside of the tube...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006794
EISBN: 978-1-62708-295-2
... the corrosion current using the conventional electrochemical system and converting it to the material dissolution rate. V w can be measured by performing a wear test in the absence of corrosion, for example, under cathodic protection conditions or using corrosion inhibitors to inhibit corrosion. Consequently...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003567
EISBN: 978-1-62708-180-1
... slurry lines used in mining operations unless some method of water separation and recirculation is used ( Ref 19 ). Use of Corrosion Inhibitors Oxidizing inhibitors, such as chromates and nitrites, have been used to raise the potential of an alloy into passive regions and to lower their corrosion...
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
.... A corrosion inhibitor is a substance that, when added in small amounts to a corrosive, reduces its corrosivity. Corrosion inhibitors function by interfering with either the anodic or cathodic reactions, or both. Many of these inhibitors are organic compounds; they function by forming an impervious film...
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
... ). Figure 8 illustrates an acceleration in the rate of CO 2 corrosion on addition of trace levels of acetate. Fig. 8 Increase in corrosion rate for steel treated with a corrosion inhibitor in carbon-dioxide-saturated 3% saline solution with addition of acetate. Source: Ref 52 . Reprinted...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0006440
EISBN: 978-1-62708-234-1
... and proof tested. It was recommended that the water system consisting of deionized water and formaldehyde be replaced with water having a low oxygen content and a cathodic inhibitor (oxygen scavenger). Brazed joints Mirrors Molybdenum Erosion - corrosion Intergranular corrosion A failed laser...
Image
Published: 15 January 2021
Fig. 8 (a) Corrosion potential ( E corr ) versus reciprocal time for reinforcing steel in distilled water (A), 3.5% NaCl (B), and 3.5% NaCl + 0.1 M NaNO 2 (C). Source: Ref 54 . (b) Effects of inhibitor K 2 CrO 4 on corrosion and corrosive wear of a steel in a dilute H 2 SO 4 solution More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001311
EISBN: 978-1-62708-215-0
... at about 13 and 7.8, respectively—degrees of alkalinity that are relatively benign with respect to corrosive attack on nickel-base superalloys and type 304 stainless steel. Additionally, the boiler water is treated with amines, which are corrosion inhibitors. Nitric acid is much more corrosively aggressive...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0006899
EISBN: 978-1-62708-225-9
... exceed 70 N · m (600 in. · lb). In flooded manholes, the galvanic-corrosion reaction between zinc (galvanizing) and stainless steel can generate hydrogen at the stainless steel cathode. The rate at which absorbed hydrogen on the cathode combines to form H 2 gas is affected by the catalytic properties...