Electropolishing

James,B.S., U.S. Patent $308,387; May 3, 1994 Johnson, J.A. et al., U.S. Patent 5,288,377; Feb. 22,1994 Kawasumi, S. and A. Uesugi, U.S. Patent 5,328,573; July 12, 1994 Ketelhohn, K.F.G. and D.F. Ball, U.S. Patent

5,290,384;Mar.1, 1994 Law,H.H.,U.S.Patent5,259,920;Nov.9, 1993 Lee,W.M.,U.S.Patent5,334,332;Aug. 2, 1994 Letize,R.A.et al., U.S.Patent5,328,561;July 12,1994 Mandich,N.V.,Transactions of the Institute of Metal Finishing, 72(1):41; 1994

McMonigal, S.U.et al., U.S.Patent5,256,452; Oct.26, 1993 Menicks,D., Transactions of the Institute of Metal Finishing, 72(1):15; 1994

Ueda, R. et al., Metal Finishing, 92(1):29; 1994 Yamaguchi, H. et al., U.S. Patent 5,275,694; Jan. 4,1994

STRIPPING A stripping process for removal of gold-flashed palladium or palladiumnickel alloys was discussed by Straschil et al. Whitton patented a method for removing a coating from aluminum, zinc or their alloys. Patents related to processes for the removal of zinc from galvanized steel in caustic solutions were granted to LeRoy and Janjua, and to LeRoy et al. A process for the stripping of compounds of titanium from base metals garnered a patent for Sue. McCormick and Hsu obtained a patent for a method of removing chromium containing conversion coatings from aluminum substrates, comprising contacting with an alkaline solution at a pH greater than 10 using ultrasonic vibrations. References LeRoy, R.L. and M.B.I. Janjua, ~U.S.. Patent 5,302,260; Apr. 12, 1994 LeRoy, R.L. et al., U.S. Patent 5,302,261; Apr. 12, 1994 McCormick, D.R. and C-F. Hsu, U.S. Patent 5,330,558; July 19, 1994 Straschil, H.K. et al., AESF SUR/FIN ‘94, Indianapolis, June 1994, Session F Sue, J.A., U.S. Patent 5,290,362; Mar. 1, 1994 Whitton, C.A., U.S. Patent 5,290,365; Mar. 1, 1994

POLISHING AND BUFFING Stango and Henderson discussed advanced brushing methods for surface finishing and described how brush tools can be used for near precision edge radiusing and flash removal. A method and apparatus for buffing spherical parts was patented by Surdacki. Carlson and Koch obtained a 30

patent for a buffing fixture. A buffing composition earned a patent for Stuart. Foster was awarded a patent for a buffing pad. Hettler discussed the properties and characteristics of polishing grade alumina. A polishing slurry comprising diamond particles, alpha alumina particles, and a suspending agent garnered a patent for Rostoker. Gorsuch and Lawson patented an abrasive article comprising abrasive elements anchored in an electrodeposited metal body. A composite abrasive wheel was the subject of a patent granted to Hsu and Brock. Abrasive filament honing tools were patented by Tyler et al., and by Scheider and Warner (I to III). Gorsuch et al. obtained a patent for an abrasive belt. Coated abrasives were the subject of patents awarded to Ott et al., to Darjee et al., to Pieper et al., to Harmon, to Stout et al., to Carman, to Buchanan, and to Peterson and Oseth.

MASS FINISHING Park discussed the benefits of process modification and in-process recycling for reducing costs and liabilities and to prevent pollution in massfinishing operations. A moisture-control process for precisely finishing pyrolytic carbon-coated parts was devised by Emken et al. Majors patented a vibratory finishing apparatus. Patents were awarded to Davidson, and to Hoffman for centrifugal disk finishing machines. A nonchelating burnishing compound won a patent for Baevsky. References Baevsky, M.M., U.S. Patent 5,284,593; Feb. 8, 1994 Davidson, R.S., U.S. Patent 5,279,074; Jan. 18, 1994 Emken, M.R. et al., U.S. Patent 5,305,554; Apr. 26, 1994 Hoffman, S.E., U.S. Patent 5,295,330; Mar. 22, 1994 Majors, C.O., U.S. Patent 5,271,184; Dec. 21, 1993 Park, E., Metal Finishing, 92(11): 14; 1994

References Buchanan, S.J., U.S. Patent 5,328,716, July 12, 1994 Carlson, D.F. and R. Koch, U.S. Patent 5,253,454; Oct. 19, 1993 Carman, L.A., U.S. Patent 5,318,605; June 7, 1994 Darjee, D.H. et al., U.S. Patent 5,286,541; Feb. 15,1994 Foster, J., U.S. Patent 5,292,567; Mar. 8, 1994 Gorsuch, 1. and T. Lawson, U.S. Patent 5,3 18,604; June 7, 1994 Gorsuch, J. et al., U.S. Patent 5,341,609; Aug. 30.1994 Harmon, K.K., U.S. Patent 5,304,224; Apr. 19, 1994 Hettler, B.A., Metal Finishing, 92(4):58; 1994 Hsu, S. and M.P. Brock, U.S. Patent 5,290,903; Mar. 1, 1994 Ott, R.L. et al., U.S. Patent 5,254,194; Oct. 19, 1993 Peterson, J.S. and D.L. Oseth, U.S. Patent 5,344,688; Sept. 6, 1994 Pieper, J.R. et al., U.S. Patent 5,304,223; Apr. 19,1994 Rostoker, D., U.S. Patent 5,300,130; Apr. 5, 1994 Scheider, A.F. and R.B. Warner (I), U.S. Patent 5,3 18,603; June 7, 1994 Scheider, A.F. and R.B. Warner, (II), U.S. Patent 5,321,919; June 21, 1994 Scheider, A.F. and R.B. Warner, (III), U.S. Patent 5,329,730; July 19, 1994 Stango, R.J. and J.A. Henderson, Products Finishing, 58(5):80; 1994

Stout, GM. et al., U.S. Patent 5,316,812; May 31,1994 Stuart, J.A., U.S. Patent 5,277,708; Jan. 11,1994 Surdacki, R.G., U.S. Patent 5,299,394; Apr. 5, 1994 ‘Qler, J.B. et al., U.S. Patent 5,279,079; Jan. 18, 1994

ELECTROPOLISHING Matlosz et al. developed an impedance analysis of a model mechanism for acceptor-limited electropolishing, which matched experimental data for the anodic dissolution of iron-chromium alloys in sulfuric-phosphoric acid electrolytes. A process for electropolishing the inside of tubular parts was the subject of a patent granted to Peters. Seimiya and Asagawa obtained a patent for an electroabrasive process for polishing the inner surface of small diameter pipe to provide an extra smooth mirror finish. References Matlosz, M. et al., Journal of the Electrochemical Society, 141(2):410; 1994 Peters, W.N., U.S. Patent 5,320,721; June 14, 1994 Seimiya, K. and K. Asagawa, U.S. Patent 5,294,309; Mar. 15, 1994

ANODIZING Major developments in anodizing technology that have taken place over the last 70 years were reviewed by Brace (I). Grubbs (I) and also Mahn discussed how to achieve a quality finish in anodizing. The development of an expert system to identify defects METALFINISHING 9 FEBRUARY 1995