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Inhibitors

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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...
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
... 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 Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0006440
EISBN: 978-1-62708-234-1
... 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...
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...
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
... 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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001486
EISBN: 978-1-62708-234-1
... aspect of design, attention being given to methods of reducing the amplitude of the liner vibration. Attempts have been made to reduce the severity of attack by attention to the environment. Inhibitors, such as chromates, benzoate/nitrite mixtures, and emulsified oils, have been tried with varying...
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
... were conducted in sulfuric acid (H 2 SO 4 ) solution that contained 1 mL/L Rodine inhibitor. The test specimens were tightened in a high-strength steel fixture with 60 N · m (540 in. · lb) of torque. Three threads of each bolt were exposed to the solution, and the remainder of the assembly was covered...
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
... corrosion will be retarded. 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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001170
EISBN: 978-1-62708-225-9
... inside. Fracture descaled with dilute hydrochloric acid with inhibitor. Approx. 1 × The fracture apparently propagated from the base of the thread and then followed the thread in a circumferential direction ( Figs. 1 and 2 horizontal at bottom). It then broke through radially at the top across...
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...
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
... losses in a corrosive-wear environment. Slurry conditioning is not economical for the short slurry lines used in mining operations unless some method of water separation and recirculation is used ( Ref 19 ). Oxidizing inhibitors, such as chromates and nitrites, have been used to raise the potential...
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
... proven by various companies [ 8 ]. A Texas facility decided to reduce costs by using gray water as cooling tower makeup water. Gray water is classified as recycled sewage water generated from dishwashers, clothes laundry, and bath water. The water treatment program used copper inhibitor tolytriazole...
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
... used to remove the rust and scale during the cogeneration plant startup. The purpose of these tests was to determine whether any of the chemical cleaning solutions or proprietary inhibitors used could have caused the SCC observed in the tube samples. The cleaning contractor was asked to provide a...
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
... 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, volume loss caused by the synergy of wear and corrosion can be calculated as V s = V t − V w...
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
... had been shipped “wet,” and although it is assumed that the antifreeze solution used was inhibited, such inhibitors are not stable 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...
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
... carbonate, which may otherwise stifle the corrosion process ( Ref 51 ). 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...
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
... biomineralization in scale formation of heat exchanger tubes. As the identification of calcium precipitating bacteria (CPB) in heat exchangers of cooling water system appears lacking, this study would be useful for the selection of suitable biocides/inhibitors in the control of CPB on scale in cooling water system...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001525
EISBN: 978-1-62708-220-4
... exposed to the same processing steps as the tanks. These panels were washed, rinsed, acid-treated, rinsed, and finally treated with a rust inhibitor. Some of these panels were then steam dried, and the others were not. The panels were then evaluated for polarization resistance and corrosion rate when...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001064
EISBN: 978-1-62708-214-3
..., and, frequently, a corrosion inhibitor. Such treatments are not generally used in the case of stainless steel pipelines and vessels. The case history detailed here concerns rapid pitting damage to a new chemical plant constructed at a tropical location ( Fig. 1 ). The extensive stainless steel...