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corrosion kinetics

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310019
EISBN: 978-1-62708-286-0
... Abstract Corrosion involves chemical reactions in equilibrium that that are understood through principles of thermodynamics. In practice, the rate at which corrosion reactions occur is the most important consideration. This chapter deals with corrosion kinetics, which allows engineers...
Image
Published: 01 November 2007
Fig. 6.67 Corrosion kinetics of alloys 625, X750, and 601 as a function of time in HF at 650 °C (1200 °F). Source: Ref 71 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310011
EISBN: 978-1-62708-286-0
... are presented in light of electrochemical potentials as opposed to purely chemical ones. Chapter 3 introduces the formal terms needed to describe electrode reaction kinetics. Chapter 4 describes the various forms of corrosion and how they are related to alloy metallurgy, chemistry, and structure. Chapter 5...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030003
EISBN: 978-1-62708-282-2
... localized changes in the composition, structure, stress level, and impurities in the joined metals and thus also can affect corrosion. The fundamental understanding of electrochemical corrosion kinetics is based on the uniform dissolution of an unfilmed, pure, homogeneous metal that is equally exposed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910049
EISBN: 978-1-62708-250-1
... energy and electrochemical potential, the effect of ionic concentration on electrode potential, and the corrosion behavior of a metal based on its potential-pH diagram. The corrosion (potential-pH) behavior of iron, gold, copper, zinc, aluminum, and titanium are described. Understanding the kinetics...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940087
EISBN: 978-1-62708-302-7
... Abstract This chapter lays the groundwork for understanding electrode kinetics associated with corrosion. It presents a simple but useful theory relating kinetics to the polarization behavior of half-cell reactions. The theory is based on the observation that electrode potentials vary...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310027
EISBN: 978-1-62708-286-0
... and Bases The examples discussed in Chapter 3, “Corrosion Kinetics,” refer mostly to corrosion in these aqueous solutions, in which the slow thinning rate of the chosen alloy can be determined through the mixed potential theory and polarization diagrams. In the case of stainless steels, the alloy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940001
EISBN: 978-1-62708-302-7
... values. The rate of corrosion, however, depends on factors influencing the kinetic mechanisms of the several processes involved in the transport of ions from metal to solution and in the supporting cathodic reactions. In addition to the species in solution relating directly to the above reactions (Fe 2...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940183
EISBN: 978-1-62708-302-7
... the anodic dissolution processes through effects on the kinetics of the interface reactions and by altering the physical and chemical structure of solid corrosion products. Examples of several environmental effects on anodic polarization are discussed subsequently. A representative effect of pH on the anodic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030062
EISBN: 978-1-62708-282-2
... phase in terms of its effect on corrosion resistance is σ and, to a lesser extent, the χ phase. These phases form over the same temperature range, approximately 550 to 1050 °C (1020 to 1920 °F), and have similar formation kinetics. Because of this, the precipitation of the χ phase is often concurrent...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090067
EISBN: 978-1-62708-266-2
... Abstract High-strength steels are susceptible to stress-corrosion cracking (SCC) even in moist air. This chapter identifies such steels and the applications where they are typically found. It provides information on crack growth kinetics and crack propagation models in which hydrogen...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420231
EISBN: 978-1-62708-310-2
... Abstract Gas-metal reactions can have a significant impact on metals and alloys, affecting their properties (during processing) and accelerating service failures, particularly in hot, corrosive environments. This chapter discusses the kinetics of gas-metal reactions and how they are driven...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030082
EISBN: 978-1-62708-282-2
... Abstract This chapter discusses the effects of metallurgical variables on dealloying corrosion. It begins by describing the processes involved in dealloying of metal alloys in aqueous environments. This is followed by a discussion on the morphology of porous dealloyed structures below and above...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230485
EISBN: 978-1-62708-298-3
... . Kinetic Reactions of High Temperature Corrosion of Beryllium in Air , The Metallurgy of Beryllium , Institute of Metals Monograph 28, Chapman and Hall Ltd. , London , p 314 – 324 Bunshah R.F. , 1965 . Future Trends in Beryllium Metallurgy Research , Beryllium—Its Metallurgy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030112
EISBN: 978-1-62708-282-2
... Abstract This chapter discusses some of the metallurgical factors that affect corrosion of weldments and describes a few considerations for selected nonferrous alloy systems: aluminum, titanium, tantalum, and nickel. weld corrosion weldments aluminum titanium tantalum nickel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030025
EISBN: 978-1-62708-282-2
... Abstract This chapter focuses on resistance characteristics and methods of protecting different forms of high-temperature gaseous corrosion, namely high-temperature oxidation, sulfidation, carburization, hydrogen effects, and hot corrosion. high-temperature gaseous corrosion high...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940127
EISBN: 978-1-62708-302-7
... and current densities, polarization characteristics, and physical variables such as anode-to-cathode area ratios and fluid velocity. It also discusses the effect of corrosion inhibitors, galvanic coupling, and external currents, making extensive use of polarization curves. chemical kinetics corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820125
EISBN: 978-1-62708-339-3
... Abstract Nickel-base alloys used for low-temperature aqueous corrosion are commonly referred to as corrosion-resistant alloys (CRAs), and nickel alloys used for high-temperature applications are known as heat-resistant alloys, high-temperature alloys, or superalloys. The emphasis...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030070
EISBN: 978-1-62708-282-2
... Abstract This chapter describes the effects of metallurgical variables on the corrosion of aluminum alloys. Emphasis is placed on the effect of constituent particles on pitting corrosion of aluminum. corrosion aluminum alloys aluminum THE METALLURGICAL EFFECTS on corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310091
EISBN: 978-1-62708-286-0
... to localized corrosion is compromised also. Fig. 8 Kinetics of ( formation Figure 9 shows the TTT (time-temperature-transformation) diagram for various high-alloy stainless steel, including austenitic, ferritic, and duplex. Alloys of all structures, ferritic, austenitic, and duplex, with high...