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anodized film

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Published: 30 November 2018
Fig. 2 Schematic diagram of the anodized film on aluminum before (left) and after (right) the sealing process. Reprinted by permission from Helmut Fischer. Source: Ref 3 More
Image
Published: 01 January 2003
Fig. 3 Formation of anodic film during electropolishing More
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003674
EISBN: 978-1-62708-182-5
... significantly influence the properties of aluminum alloys. There are organic coatings or paints that provide a barrier between a corrosive environment and aluminum surface. Inorganic coatings, including claddings, and enhanced oxides, such as anodized films, Boehmite films, and conversion coatings also help...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003680
EISBN: 978-1-62708-182-5
... Abstract Anodizing is one of the most common surface treatments of aluminum and is performed for corrosion protection. This article describes the structure and growth characteristics of the types of anodic oxide films such as a barrier-type oxide film and a porous-type anodic oxide film...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003595
EISBN: 978-1-62708-182-5
... anodic dissolution of the anode material and cathodic deposition on the CE of some species present in the electrolyte. During the electrolytic process, the products of the anodic metal dissolution react with the electrolyte to form a film at the surface of the metal as shown in Fig. 3 . Fig. 3...
Image
Published: 01 January 2003
Fig. 2 Structure of porous type anodic oxide film formed on aluminum in acid solutions More
Image
Published: 01 January 2003
Fig. 6 Distribution of protons and anions in porous type anodic oxide films. A, Al 2 O 3−x (anion) y · z H 2 O; B, Al 2 O 3−x (anion) y ; C, Al 2 O 3 More
Image
Published: 01 January 2003
Fig. 7 Coloring of porous type anodic oxide films on aluminum by (a) integral coloring, (b) dyeing, and (c) electrolytic coloring More
Image
Published: 01 January 2003
Fig. 9 TEM image of the vertical section of a porous type anodic oxide film on aluminum. The aluminum specimen was anodized for 5 min at 30 V in 0.16 M oxalic acid solution at 40 °C (140 °F) and then immersed for 1 h on open circuit in the same solution. More
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006530
EISBN: 978-1-62708-207-5
... (i.e., conversion coating or thin anodized film). The exposure of the freshly acidic-etched (pickled) surface to boiling water produces a corrosion-resistant but only moderately strong oxide layer. Thus, this surface treatment method should only be used for lightly stressed joints using flexible...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001281
EISBN: 978-1-62708-170-2
... anodic films are harder than the substrate material, the coatings produced by chromic acid and some sulfuric acid baths are too thin or too soft to meet the requirements for abrasion resistance. Increase paint adhesion: The tightly adhering anodic coating offers a chemically active surface for most...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003752
EISBN: 978-1-62708-177-1
... formation and interference techniques such as anodizing, chemical etching, and tint etching. It provides a description of reagents that deposit sulfide films and molybdate films. The article concludes with a discussion on the thermal and vapor deposition methods to produce color. anodizing chemical...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006499
EISBN: 978-1-62708-207-5
... oxide in the pores to hydrated aluminum oxide, which is a larger molecule and literally clogs or fills up the pore with hydrated aluminum oxide. Adapted from Ref 2 Fig. 2 Schematic diagram of the anodized film on aluminum before (left) and after (right) the sealing process. Reprinted...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001250
EISBN: 978-1-62708-170-2
... the alkaline electrolytes is simple if one understands anode behavior, because there are no electrolyte constituents except the applicable stannate and hydroxide. Tin anodes must be properly filmed, or polarized, in alkaline solutions to dissolve with the tin in the Sn +4 state. Once established...
Book Chapter

By Jerome Kruger
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003585
EISBN: 978-1-62708-182-5
... diagram. The article presents a potential-pH diagram for the iron-water system and an illustration of an idealized anodic polarization curve for a metal surface, which serves as a basis for describing the kinetics of passivation. It discusses five properties of passive films: thickness, composition...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001312
EISBN: 978-1-62708-170-2
... in voltage may overload the amperage and/or power capabilities of the equipment. A wide variety of anodization films with different thicknesses and colors can be produced. Voltage governs the thickness of the oxide layer, which determines the color (first gold, then red, green, blue, and black...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003677
EISBN: 978-1-62708-182-5
... alloys. The article also illustrates the effects of alloying on active anodic corrosion of titanium and repassivation behavior of titanium and titanium-base alloys. titanium oxide film titanium oxide depassivation scratching abrading fretting titanium alloys hexagonal close-packed beta...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003749
EISBN: 978-1-62708-177-1
... and describes several methods for film formation, namely, heat tinting, color etching, anodizing, potentiostatic etching, vapor deposition, and film deposition by sputtering. It provides information on the general procedures and precautions for etchants and reagents used in metallographic microetching...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003827
EISBN: 978-1-62708-183-2
... anodized coatings plasma-sprayed coatings BERYLLIUM, like aluminum, is a thermodynamically reactive metal that forms a thin, well-bonded oxide layer on the surface at room temperature. Of the structural metals, only magnesium is more reactive. The oxide film on beryllium is approximately 10 nm (0.4...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006512
EISBN: 978-1-62708-207-5
... by the electrolytic coloring process for the most part ( Ref 1 ). The first work on colored anodic films was done in Japan using oxalic acid, which produces very hard films with yellow to light bronze colors, but because these coatings required very thick films to develop colors, they were not very popular...