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barrier-type oxide film

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030165
EISBN: 978-1-62708-282-2
... corrosion-resistant stainless steels. The corrosion resistance of stainless steels is due to the protective nature of the surface oxide film that forms a barrier between the environment and the alloy. The physical and chemical properties of the oxide film and the service environment determine the corrosion...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240323
EISBN: 978-1-62708-251-8
... of electrochemical corrosion and then some of the various types of corrosion. This is followed by a short section on corrosion control. The last section deals with high-temperature oxidation that usually occurs in the absence of moisture. 18.1 Basics of Electrochemical Corrosion Electrochemical corrosion...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060369
EISBN: 978-1-62708-261-7
... or protective barrier that is stable over a considerable range of oxidizing power and is eventually destroyed in strong oxidizing solutions. Under conditions in which the surface film is stable, the anodic reaction is stifled and the metal surface is protected from corrosion. Metals that possess an active...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2022
DOI: 10.31399/asm.tb.dsktmse.t56050001
EISBN: 978-1-62708-432-1
..., siliconizing, chromizing, vanadizing, and titanizing. It also discusses diffusion bonding and presents several approaches for dealing with oxide barrier problems. carburizing concentration gradient diffusion bonding diffusion coating Fick’s laws grain boundary diffusion interstitial diffusion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870025
EISBN: 978-1-62708-299-0
... beryllium and magnesium are more reactive. As mentioned, aluminum owes its excellent corrosion resistance and its usage as one of the primary metals of commerce to the barrier oxide film that is bonded strongly to its surface. The normal surface film formed in air at ambient temperature is only about 5 nm...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120085
EISBN: 978-1-62708-269-3
... they contain oxidizing agents, the effect of these materials is not as aggressive as it is in the high-temperature fused salts. Consequently, organic materials are not destroyed, but they are saponified and absorbed. Silicate barrier films and molybdenum disulfide are soluble in these low-temperature salts...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910363
EISBN: 978-1-62708-250-1
... and moisture resistances are similar to those of polyamide-cured epoxies and abrasion resistance is usually excellent. Most common are acrylic polyol types that have excellent weatherability but lesser chemical and moisture resistance than the more expensive polyester polyol types. Apply in thin film 36 μm...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090241
EISBN: 978-1-62708-266-2
... Abstract Aluminum is protected by a barrier oxide film that, if damaged, reforms immediately in most environments. Despite this inherent corrosion resistance, there are conditions where aluminum alloys, like many materials, are subject to the effects of stress-corrosion cracking (SCC...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030019
EISBN: 978-1-62708-282-2
... showing how breaks in mill scale (Fe 3 O 4 ) can lead to galvanic corrosion of steel Metallic Coatings Two types of metallic coatings are used in engineering design: noble metal coatings and sacrificial metal coatings. Noble metal coatings are used as barrier coatings over a more reactive metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910193
EISBN: 978-1-62708-250-1
... of (a) ionization effects in aqueous solutions and the effects of even trace amounts of water in nonaqueous environments and (b) changes that occur in the characteristics of any film of corrosion products that may be present on the surface of the metal. Typical patterns of the types of corrodent-concentration...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740325
EISBN: 978-1-62708-308-9
... industry. Chromate treatments are of two types: those that are complete in themselves and deposit substantial chromate films on the substrate metal, and those that are used to seal or supplement oxide, phosphate, or other types of nonmetallic protective coatings. Two chromate treatments for aluminum...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350125
EISBN: 978-1-62708-315-7
... are among the most widely used surface-engineering processes. Paints or linings that act as protective film to isolate the substrate from the environment exist in a number of different forms. Sheet linings, commonly of the vinyl or vinylidene chloride family, are one such type of coating that can be either...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870235
EISBN: 978-1-62708-314-0
... ( Fig. 8.5 ) consists of shallow pores and whisker-like protrusions of amorphous Al 2 O 3 on top of a thin barrier layer. The microroughness provides a means of mechanical interlocking between the adhesive and the oxide surface that is critical for bond durability. Fig. 8.5 Surface morphology...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030045
EISBN: 978-1-62708-282-2
... nutrients for the microbes to use as food, and often, in shielding the organisms from the toxic effect of biocides. The slime film can influence corrosion by trapping or complexing heavy-metal ions near the surface. It can also act as a diffusion barrier for chemical species migrating to or from a metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910237
EISBN: 978-1-62708-250-1
..., and their corrosion rate decreases to much lower values than those for carbon steel. This alternate wetting and drying cycle produces a protective oxide film on weathering steel, but it produces a more porous nonprotective oxide film on carbon steel. Repeated cycles of this type ultimately result in complete coverage...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280287
EISBN: 978-1-62708-267-9
... protective coatings, including aluminide diffusion, overlay, and thermal barrier types, and how they perform in different environments based on their ability to tolerate strain. coatings corrosion resistance corrosion testing hot corrosion superalloys Overview Introduction Elevated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
... aluminum oxide film formed on the surface. A thin oxide film naturally forms on aluminum when exposed to air but is easily removed and destroyed, although it will reform. Various types of oxide coatings are frequently applied to steel for decorative and corrosion-resistance purposes. However, like certain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
... of silver in air, the oxidation of aluminum in air, or attack on lead in sulfate-containing environments, thin, tightly adherent protective films are produced, and the metal surface remains smooth. Prevention Uniform corrosion can be prevented or reduced by proper materials selection, the use...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940001
EISBN: 978-1-62708-302-7
... the passive film on the metal surface. Fig. 1.8 Schematic representation of the effect of increasing oxidizing power of the environment on the corrosion of an active-passive type alloy such as stainless steel For some materials in some environments, it is not possible to form passive films...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.9781627083027
EISBN: 978-1-62708-302-7