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Conversion coating on aluminum

Chromium Phosphate. Chromium phosphate treatment baths are strongly acidic and comprise sources of hexavalent chromium, phosphate, and fluoride ions. Conversion coating on aluminum precedes by the foUowing reactions (24) ... [Pg.223]

Chromium Chromate. Chromium chromate treatment baths are acidic and made up from sources of hexavalent chromium and complex fluoride, fluorosiHcate, fluorozirconate, fluorotitanate, and siHcofluorides. Optional additional components added to accelerate coating rate are free fluoride, ferricyanide, and other metal salts such as barium nitrate. Conversion coating on aluminum precedes by the following reactions (2,3,17) ... [Pg.224]

MIL-C-5541E, Chemical Conversion Coatings on Aluminum and Aluminum Alloys. 1990, NAEC Lakehurst, NJ. [Pg.355]

Other recent applications of ISS have included the study of thin Zr02 films [201 ], a comparison of various techniques for cleaning InP substrates before epitaxial growth [216], analysis of conversion coatings on aluminum alloys [217], and study of alkali-induced sintering of an iron oxide mono-layer on platinum [218]. [Pg.906]

Yu et introduced a process for the formation of double layer REM conversion coatings on aluminum alloy A1 2024. The results of polarization measurements showed that the corrosion resistance provided by the double layer REM conversion coatings was superior to that of chromate conversion coatings (CCC). Heller et examined the corrosion performance, morphology and... [Pg.58]

Xia L., McCreery R. (1998), Chemistry of a chromate conversion coating on Aluminum alloy AA2024-T3 probed by vibrational spectroscopy , J. Electrochem. Soc., 145, 3083-3089. [Pg.266]

Figure 1. Effect of 5% NaCl/S02 fog exposure on corrosion resis properties of chemical conversion coatings on 7075-T6 aluminum a... Figure 1. Effect of 5% NaCl/S02 fog exposure on corrosion resis properties of chemical conversion coatings on 7075-T6 aluminum a...
It has been recently shown that as-synthesized template-containing high-silica MFI coatings on aluminum alloys have superior corrosion resistance to chromate conversion coatings in strong acids, bases, as well as pitting aggressive and the in situ... [Pg.3240]

G. M. Brown, K. Shimizu, G. E. Kobayashi, et al.. The growth of chromate conversion coatings on high purity aluminum, Corros. Sci. 54 1045-1054 (1993). M. W. Kendig, A. J. Davenport, and H. S. Isaacs. The mechanism of corrosion inhibition by chromate conversion coatings from X-ray absorption near edge spectroscopy (XANES), Corros. Sci. 54 41 9 (1993). [Pg.726]

S. Kiyota, B. Valdez, M. Stoytcheva, R. Zlatev and M. Scorr, Electrochemical study of corrosion behavior of rare earth based chemical conversion coating on aerospace aluminum alloy , J. Electrochem. Soc. 158, 666 (2009). [Pg.81]

Forming a conversion coating on a metal surface by anodic oxidation most frequently applied to aluminum. [Pg.465]

Only films formed in chromate solutions meet the stringent corrosion resistance requirements of the military specifications MILC81706. - " It is estimated that about 100,000 tonnes of aluminum per year in the U.K. are chromate treated. An anodized film may be substituted for chromate conversion coatings on certain aluminum products but only at greater operating and capital costs. ... [Pg.48]

Camprestrini, P. van Westing, E. P. M. de Wit, J. H. W. "Influence of Surface Preparation on Performance of Chromate Conversion Coatings on Alclad 2024 Aluminum Alloy Part I Nucleation and Growth," Electrochimica Acta, 2001,2553-2571. [Pg.153]

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See also in sourсe #XX -- [ Pg.249 ]



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