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anodized film

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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 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...
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
... produced an interference film, colored grains should be visible. (b) Viewed with polarized light and (c) with polarized light plus a sensitive tint filter. The magnification bars in (b) and (c) are 100 μm long. (d) As-cast (concast) 1100 aluminum (>99% Al) anodized with Barker's reagent (30 V direct...
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
... – 1285 10.1016/0013-4686(86)80148-7 18. Leach J. and Pearson B. , The Effect of Foreign Ions upon the Electrical Characteristics of Anodic ZrO 2 Films , Electrochim. Acta , Vol 29 ( No. 9 ), 1984 , p 1271 – 1282 10.1016/0013-4686(84)87190-X 19. Chappell M.J...
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
... the system becomes passive and exhibits the passive current density i p . The critical current density for passivation is i c . Fig. 6 Logarithmic plots of the growth of passive film on iron by potentiostatic anodic polarization at different potentials in pH 8.4 borate-buffer solution...
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
... etching in conjunction with light microscopy 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...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003583
EISBN: 978-1-62708-182-5
... to the equilibrium between a metal and one of its oxides/hydroxides. The article schematically illustrates a current-potential or polarization curve for an anodic process. kinetics aqueous corrosion equilibrium potentials electrochemical reaction Nernst equation electronic conductivity passive films...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003819
EISBN: 978-1-62708-183-2
... aeration, alkalinity, and stray currents. The resistance of lead and lead alloys to corrosion by a wide variety of chemicals is attributed to the polarization of local anodes caused by the formation of a relatively insoluble surface film of lead corrosion products. The article also provides information...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003825
EISBN: 978-1-62708-183-2
... corrosion resistance and inertness of tantalum are attributed to a very thin, impervious, protective oxide film that forms on exposure of the metal to slightly anodic or oxidizing conditions. This article provides a discussion on the mechanism of corrosion resistance and on the behavior of tantalum...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003822
EISBN: 978-1-62708-183-2
... hand, very high resistance to anodic current flow (anodic polarization) across this passive oxide film can be expected in most aqueous solutions. Because the passivity of titanium stems from the formation of a stable oxide film, an understanding of the corrosion behavior of titanium is obtained...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001311
EISBN: 978-1-62708-170-2
... . Abstract Abstract This article reviews cleaning and finishing operations that have proven to be effective on titanium, its alloys, and semi-fabricated titanium products. It explains how to remove scale, tarnish films, grease, and other soils and how to achieve required finishes and/or improve wear...
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
... of a suitable inorganic or organic coating. Surface Pretreatment Surface Cleaning Conversion Coating Systems Thin Anodized Films Primer Coating Adhesive materials are available in seven general forms: solvent based, water based, liquid, powder, film, solid extruded forms such as rods...
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
... in controlled 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...
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
...Conventional anodizing processes Table 1 Conventional anodizing processes Bath Amount, wt% Temperature Duration, min Voltage, V Current density Film thickness Appearance properties Other properties °C °F A/dm 2 A/ft 2 μm mils Sulfuric acid bath Sulfuric acid...
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
... be properly filmed, or polarized, in alkaline solutions to dissolve with the tin in the Sn +4 state. Once established, the anode film continues to provide the tin as Sn +4 . The anodes can be filmed either by subjecting them for about 1 min to a current density considerably above that normally used...
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
... • Abd El-Rahman H.A. , Mechanism of Growth of the Open Circuit Insulating Oxide Films on Valve Metals , Mater.wiss. Werkst.tech. , Vol 22 ( No. 9 ), Sept 1991 , p 349 – 354 • Anjaneyulu C. and Sastry K.S. , Mechanism of Anodic Oxide Film Formation on Titanium...
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
... to convert the aluminum 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...
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
... of exposure, but the effective rate of oxidation is 100 times less than unprotected beryllium. Samples were also exposed to air with 1% moisture at 800 °C (1470 °F) for over 1000 h without evidence of attack. At higher temperatures, the normally dark anodic film turns the alabaster white of beryllium oxide...
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
.... The colors are also dependent on the alloy being anodized and not all aluminum alloys can be colored with this process. It is used very sparingly in the market today and is replaced by the electrolytic coloring process for the most part ( Ref 1 ). The first work on colored anodic films was done in Japan...
Book Chapter

By Jude Mary Runge
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006523
EISBN: 978-1-62708-207-5
.... The article reviews the two most basic types of oxides, namely, barrier-layer anodic oxides and porous anodic oxides. It concludes with a description of postanodizing processes, such as dyeing and sealing. References References 1. Runge J. and Pomis A. , Anodic Oxide Film Formation...