Download or read book The Corrosion Protection of 6061 T6 Aluminum by a Polyurethane Sealed Anodized Coat written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-13 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The corrosion protection of 6061-T6 anodized aluminum afforded by a newly patented polyurethane seal was studied using the ac impedance technique. Values of the average corrosion rates over a 27-day exposure period in 3.5 percent NaCl solutions at pH 5.2 and pH 9.5 compared very favorably for Lockheed-prepared polyurethane-sealed and dichromate-sealed coats of the same thickness. Average corrosion rates for both specimens over the first 7 days of exposure compared well with those for a hard anodized, dichromate-sealed coat, but rose well above those for the hard anodized coat over the entire 27-day period. This is attributed both to the greater thickness of the hard anodized coat, and possibly to its inherently better corrosion protective capability. Danford, M. D. Marshall Space Flight Center ...
Download or read book The Corrosion Protection of 6061 T6 Aluminum by a Polyurethane sealed Anodized Coat written by and published by . This book was released on 1990 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Corrosion Protection of Aluminum by Various Anodizing Treatments written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-24 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion protection to 6061-T6 aluminum, afforded by both teflon-impregnated anodized coats (Polylube and Tufram) and hard-anodized coats (water sealed and dichromate sealed), was studied at both pH 5.5 and pH 9.5, with an exposure period of 28 days in 3.5 percent NaCl solution (25 C) for each specimen. In general, corrosion protection for all specimens was better at pH 9.5 than at pH 5.5. Protection by a Tufram coat proved superior to that afforded by Polylube at each pH, with corrosion protection by the hard-anodized, water-sealed coat at pH 9.5 providing the best protection. Electrochemical work in each case was corroborated by microscopic examination of the coats after exposure. Corrosion protection by Tufram at pH 9.5 was most comparable to that of the hard-anodized samples, although pitting and some cracking of the coat did occur. Danford, Merlin D. Marshall Space Flight Center ...
Download or read book NASA Tech Briefs written by and published by . This book was released on 1992-10 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FY 1990 Scientific and Technical Reports Articles Papers and Presentations written by and published by . This book was released on 1990 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Corrosion Resistant Surfaces on 6061 Aluminum Alloy written by Edward Troiano and published by . This book was released on 1986 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was undertaken in order to provide corrosion protection for 6061 aluminum. Anodizing (Type II and III), chemical conversion coating, and solid film lubricants were tested and evaluated. It was found that anodizing Type II offers excellent corrosion protection, but in cases where anodizing cannot be used, chemical conversion coating and solid film lubricants offer ample corrosion protection.
Download or read book The Corrosion Protection of Aluminum by Various Anodizing Treatments written by and published by . This book was released on 1989 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Corrosion Protection of 2219 T87 Aluminum by Anodizing written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-13 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various types of anodizing coatings were studied for 2219-T87 aluminum. These include both type II and type III anodized coats which were water sealed and a newly developed and proprietary Magnaplate HCR (TM) coat. Results indicate that type II anodizing is not much superior to type II anodizing as far as corrosion protection for 2219-T87 aluminum is concerned. Magnaplate HCR (TM) coatings should provide superior corrosion protection over an extended period of time using a coating thickness of 51 microns (2.0 mils). Danford, M. D. Marshall Space Flight Center ...
Download or read book Primerless Finishing Systems for the Corrosion Protection of Aluminum written by Donald J. Hirst and published by . This book was released on 1988 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A trend to develop primerless systems for military equipment has begun in which a topcoat can be applied directly to surface treated aluminum. Two approaches to obtain a primerless system are currently available and were investigated. In the first approach, a standard sulfuric acid anodized surface was sealed with a polyurethane colloidal suspension. The resulting pretreatment can be directly topcoated. The second approach involved the application of a primerless or self-priming topcoat applied directly to a surface pretreatment. Adhesion, electrochemical impedance spectroscopy, flexibility and corrosion resistance tests were performed on several aluminum substrates to determine the physical properties of the coating-pretreatment systems. The results of this analysis indicate that these primerless systems show promise and should be considered for specific finishing system applications. Keywords: Primerless coating systems; Organic coatings; Corrosion protection; Inorganic pretreatments; Coatings; Primers; Finishes. (kt).
Download or read book Metals Abstracts written by and published by . This book was released on 1990-07 with total page 1466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Corrosion Protection of Several Aluminum Alloys by Chromic Acid and Sulfuric Acid Anodizing written by and published by . This book was released on 1994 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Corrosion Protection of Several Aluminum Alloys by Chromic Acid and Sulfuric Acid Anodizing written by M. D. Danford and published by . This book was released on 1994 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The corrosion protection afforded 7075-T6, 7075-T3, 6061-T6, and 2024-T3 aluminum alloys by chromic acid and sulfuric acid anodizing was examined using electrochemical techniques. From these studies, it is concluded that sulfuric acid anodizing provides superior corrosion protection compared to chromic acid anodizing.
Download or read book Marine Technology 1970 written by Marine Technology Society and published by . This book was released on 1970 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Technology Society Journal written by Marine Technology Society and published by . This book was released on 1971 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1990 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASM Handbook written by and published by . This book was released on 2005 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
