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aluminum oxide coating

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870179
EISBN: 978-1-62708-299-0
... constitute from 10 to 70 vol% of the composite. Continuous-fiber or filament reinforcements for aluminum include graphite, silicon carbide (SiC), boron, and aluminum oxide (Al 2 O 3 ). Fabrication techniques for these composites vary from vapor deposition coating of the fibers, liquid-metal infiltration...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280287
EISBN: 978-1-62708-267-9
... The aluminum contents of many superalloys are insufficient to provide long-term Al 2 O 3 protection, and so protective coatings are applied, as noted. These coatings also prevent selective attack that occurs along grain boundaries and at surface carbides (see Fig. 13.8 ) and inhibit internal oxidation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460185
EISBN: 978-1-62708-285-3
... and their behavior under oxidation and thermal cycling tests ( Ref 7.9 , 7.16 – 7.21 ). MCrAlY coatings typically consist of gamma-beta structure. Gamma is the Ni (or Co) solid solution and beta is the Ni (Co)-Al phase. In MCrAlY coatings, β acts as the reservoir for aluminum and provides the aluminum for thermally...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350095
EISBN: 978-1-62708-315-7
... substitutes. Aluminum Anodizing Aluminum anodizing is an electrochemical method of converting aluminum into aluminum oxide (Al 2 O 3 ) at the surface of the item being coated. It is accomplished by making the workpiece the anode while suspended in a suitable electrolytic cell. Although several metals...
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Published: 01 August 1999
Fig. 12 Coated discontinuous silicon carbide (particulate)/aluminum MMCs after seawater exposure. (a) Coated with ion vapor deposited aluminum; 4 month exposure. (b) Coated with plasma-sprayed aluminum oxide; 18 month exposure. (c) Coated with arc-sprayed zinc; 9 month exposure More
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 August 1999
DOI: 10.31399/asm.tb.caaa.t67870191
EISBN: 978-1-62708-299-0
... examination. (c) Applicable for thicknesses of 0.500 in. and greater Anodizing Aluminum anodizing is an electrochemical method of converting aluminum into aluminum oxide (Al 2 O 3 ) at the surface of the item being coated. It is accomplished by making the workpiece the anode while suspended...
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
... concentration, temperature of treatment, and process time. In service, the surface of such aluminides reacts with oxygen at high temperature to produce a protective aluminum oxide film ( Table 6 ). Hence, aluminide coatings are highly beneficial for high-temperature corrosion resistance, oxidation-resistant...
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
... aluminum forms a protective film of alumina (Al 2 O 3 ). Unfortunately, although steel also produces a surface film, the film is porous and does not adhere very well, so the corrosion continues. Uniform corrosion is normally prevented by selecting a metal that forms a protective film, by applying coatings...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350125
EISBN: 978-1-62708-315-7
... oxidation of the zinc bath. In addition, aluminum in the range of 0.1 to 0.3 wt% is added to the zinc bath to suppress the growth of brittle iron-zinc intermetallic phases at the steel coating interface by forming the Fe 2 Al 5 (Zn) inhibition layer. The end of this incubation period is marked...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030165
EISBN: 978-1-62708-282-2
... further corrosion. Anodization of aluminum, one of the more commonly used conversion coating techniques, produces a protective aluminum oxide film on the aluminum metal. Another example of a chemical conversion coating is phosphatizing for the protection of automobile bodies. Metallic coatings create...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030169
EISBN: 978-1-62708-282-2
... are of several different types. There are inorganic coatings, including claddings, and enhanced oxides, such as anodized films, Boehmite films, and conversion coatings. Each of these is discussed in more detail in the following paragraphs. Alclad Aluminum Alclad aluminum is a duplex product in which...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000001
EISBN: 978-1-62708-313-3
.... Diffusion coatings were the first to be developed in which large amounts of principally aluminum were diffused into the surface of the substrate superalloy. These coatings proved to be highly successful because their increased oxidation and corrosion resistance permitted turbine inlet temperatures up...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230105
EISBN: 978-1-62708-351-5
... that is introduced during the furnace brazing of aluminum. The vapor reacts with the alumina surface coating to form a complex aluminum-magnesium oxide spinel, which is broken up readily by molten filler metals (see section 3.4.3 ). Brazing fluxes often function by dissolving oxides. Controlled gas...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300227
EISBN: 978-1-62708-323-2
... they are subjected to liquid, droplet, and solid particle erosion. It also discusses the tribology of nickel- and cobalt-base alloys as well as titanium, zinc, tin, aluminum, magnesium, beryllium, graphite, and different types of wood. alloy composition cobalt-base alloys corrosion-resistant metals friction...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280203
EISBN: 978-1-62708-267-9
... on formed or machined-finished parts during final heat treatment is allowed to remain as protection against further oxidation. In fact, coatings are applied to enhance the surface corrosion resistance of superalloys. The coatings work by providing more aluminum and chromium than normally would be present...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240563
EISBN: 978-1-62708-251-8
... protection of superalloys is the aluminide diffusion coating, which develops an aluminide (CoAl or NiAl) outer layer with enhanced oxidation resistance. This outer layer is developed by the reaction of aluminum with the nickel or cobalt in the base metal. Aluminide diffusion coatings generally are applied...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910237
EISBN: 978-1-62708-250-1
... coatings Thermal spray coatings (zinc, aluminum, or zinc-aluminum alloys) Electroless and electroplated coatings, for example, nickel-phosphorus, nickel, chromium, nickel-chromium-copper, zinc, and cadmium Clad coatings, for example, roll-bonded stainless steel on carbon steel Pack cementation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
... originates on the opposite, unprotected side of thin, painted sheet steel, repainting the painted side will have no long-term benefit. Various oxide coatings are frequently used for improved corrosion resistance. An example is anodized aluminum, which is essentially aluminum with a relatively thick...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460209
EISBN: 978-1-62708-285-3
... were successfully deposited on different types of bond coats (nickel-aluminum and pure aluminum) in both cases, even though some pores existed in the deposited pyramidal fins. Other practical cases of components fabricated by CGDS additive manufacturing are shown in Fig. 8.2 ( Ref 8.26 , 8.27...