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velocity-accelerated corrosion

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030292
EISBN: 978-1-62708-282-2
... stress cracking, hydrogen-induced cracking, stress-oriented hydrogen-induced cracking, hydrogen embrittlement cracking, stress-corrosion cracking, velocity-accelerated corrosion, erosion-corrosion, and corrosion control is provided. petroleum refineries petrochemical plants materials selection...
Image
Published: 01 December 2015
Fig. 45 Accelerated high-temperature sulfidic corrosion in 500 mm (20 in.) diameter pipe of vacuum furnace outlet header due to droplet impingement at high vapor velocities More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080235
EISBN: 978-1-62708-304-1
... the metal is impacted by a particle-laden gas stream. Under conditions involving very high particle velocities, such as 100 m/s (328 ft/s) or higher, at elevated temperatures, oxidizing environments (e.g., air) significantly accelerate the erosion-corrosion rates compared with an inert environment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.t56040010
EISBN: 978-1-62708-428-4
... and accelerated by the high-temperature, high-velocity plasma gas stream ( Fig. 3 ). Torch design and operating parameters are critical in determining the temperature and velocity achieved by the powder particles. Figure 3 Plasma spray system The powder velocities usually achieved in plasma spray...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870219
EISBN: 978-1-62708-299-0
... corrosion products that force metal away from the body of the material and giving rise to a layered appearance. As described in Chapter 4 , exfoliation of aluminum is a problem primarily with the high-strength 2 xxx and 7 xxx alloys used in aircraft. Accelerated laboratory corrosion tests...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910099
EISBN: 978-1-62708-250-1
... accelerate crevice attack. It should be noted, however, that tubercles frequently form without the presence of any biological organisms, and the following discussion does not take into account biological effects. Chapter 5 describes the influence of biological organisms and biofilms on corrosion. Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870085
EISBN: 978-1-62708-299-0
... (wear, flow velocity, and/or fatigue) to produce severe attack, usually of a localized nature. Because removal of the protective aluminum oxide film by mechanical processes exposes fresh metal to attack, corrosion occurs at an accelerated rate. Erosion-Corrosion Erosion-corrosion is a general...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120123
EISBN: 978-1-62708-269-3
..., there are critical velocities beyond which protective films are swept away and accelerated corrosion attack occurs. This accelerated attack is known as erosion-corrosion. The critical velocity differs greatly from one material to another and can be as low as 0.6 to 0.9 m/sec (2–3 ft/sec). For titanium, the critical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910193
EISBN: 978-1-62708-250-1
... the corrosion tendency for the specific metal/environment combination. More detailed information regarding the use of inhibitors for corrosion control can be found in Chapter 9 . Velocity/Fluid Flow Rate The influence of fluid flow rate, or fluid velocity, is a complex variable, and its influence...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030349
EISBN: 978-1-62708-282-2
... of inertial and viscous forces is responsible for accelerating or decelerating metal loss at the fluid/metal interface. Another relevant aspect of flow- or velocity-induced corrosion is erosion-corrosion ( Ref 32 ), which refers to the mechanical removal of corrosion-product films through momentum effects...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090271
EISBN: 978-1-62708-266-2
... exhibiting transgranular SCC in methanol can experience accelerated cracking with halogen/halide additions, and inhibitive effects with increasing water content. Stress-corrosion cracking is generally difficult to observe in absolutely pure methanol but becomes favored at HCl levels above 10 −6 M...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
.... Corrosive Conditions If oxygen and water are both present, corrosion will normally occur on iron and steel. Rapid corrosion may take place in water, the rate of corrosion being accelerated by several factors such as: (a) the velocity or the acidity of the water, (b) the motion of the metal, (c...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090221
EISBN: 978-1-62708-266-2
... that of oxygen reduction, and thus cupric ion reduction is the dominant reaction in copper-containing solutions. The overall process is autocatalytic in that the corrosion reaction generates more cuprous ions in solution, which subsequently form cupric ions, which in turn accelerate the rate of corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030247
EISBN: 978-1-62708-282-2
... in corrosion control. Because of the low solubility, rapid precipitation, and mechanical properties of such corrosion products, velocity effects are not as commonly encountered in sour (H 2 S-containing) systems as in sweet (CO 2 -containing) systems. However, this effect can also be influenced...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030200
EISBN: 978-1-62708-282-2
..., the volume and composition of the produced water and oil will influence the application method and performance of the inhibitor. Oxygen entry into either a sweet or sour corrosion system results in significant corrosion consequences. Corrosion is accelerated, deposition is increased, and inhibitor function...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460001
EISBN: 978-1-62708-285-3
... particles in the range of 5 to 100 μm in diameter are accelerated in a supersonic jet of heated gas to high velocities, typically on the order of 300 to 1200 m/s (1000 to 4000 ft/s), and then sprayed onto a hard substrate surface; for example, a metal, ceramic, or glass. If the velocity is high enough...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.t56040001
EISBN: 978-1-62708-428-4
... to protect or modify the behavior of a substrate material and/or component. A substantial number of the world’s industries utilize thermal spray for many critical applications. [ 2 ] Key application functions include: Restoration and repair Protection against corrosion Protection against forms...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910497
EISBN: 978-1-62708-250-1
... Corrosion: Understanding the Basics Copyright © 2000 ASM International® J.R. Davis, Editor All rights reserved DOI: 10.31399/asm.tb.cub.t66910497 www.asminternational.org 1APPENDIX Glossary of Corrosion-Related Terms A accelerated corrosion test. Method designed to approximate, in a short time...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.9781627082501
EISBN: 978-1-62708-250-1
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030215
EISBN: 978-1-62708-282-2
... simple static immersion at a controlled temperature to complex testing under combined heat-transfer and velocity conditions. Guidance for conducting laboratory corrosion tests is available in Ref 13 – 17 . After exposure for a specified length of time (generally, a minimum of 1 week), the coupons...