Testing and control

Krish, V. et al., U.S. Patent 5,514,423; assignors to Ford Motor Co. Lipson, R.B., U.S. Patent 5,468,533; assignor to Kwik Paint Products Loar, J.E., Products Finishing, 61(2):42; 1996 Lysell, L. and L. Malmbom, U.S. Patent 5,520,961; assignors to Casco Nobel AB Martin, W. et al., U.S. Patent 5,556,466; assignors to Duerr GmbH Matschke, G., U.S. Patent 5,503,880; assignor to Sames S.A. Maynard, WC., U.S. Patent 5,460,661; assignor to Fisher Co. McHugh, B., Metal Finishing, 94(8):29; 1996 Mills, P., Products Finishing, 60(9):78; 1996 Milovich, R. et al., U.S. Patent 5,549,755; assignors to Nordson Corp. Napadow, SC. et al., U.S. Patent 5527,564, assignors to Stanley C. Napodow Nielsen, K.A., U.S. Patent 5,464,154; assignor to Union Carbide Chemicals & Plastics Technology Corp. Noakes, T.J. and M.L. Green, U.S. Patent 5,503,335; assignors to Imperial Chemical Industries PLC Ogasawara, T. and M. Shinoda, U.S. Patent 5,531,833; assignors to Mazda Motor Corp. Oomori, S. et al., U.S. Patent 5,456,755; assignors to YKK Corp. Ottney, T., Metal Finishing, 94(9):50; 1996 Padgett, D. and R.J. Lind, U.S. Patent 5526,986; assignors to Grace Inc. Pasch, R.M. and K.C. Langenecker, U.S. Patent 5,500,271; assignors to Research Products Corp. Pietrowski, M.L. et al., U.S. Patent 5,518,543; assignors to Anchor Hocking Corp. Reale, L., U.S. Patent 5,460,859; assignor to Xerox Corp. Robb, R.A. et al., U.S. Patent 5,485,860; assignors to Herkules Equipment Corp. Seewaldt, K., U.S. Patent 5,487,782; assignor to ITW Oberflachentechnik GmbH Shutic, J.R. et al., U.S. Patent 5,482,556; assignors to Nordson Corp. Statz, C. and T. Strandberg, U.S. Patent 5,501,736; assignors to Harley-Davidson Motor Co. Steinberg, T.D. et al., U.S. Patent 5,497,945; assignors to Wagner Spray Tech Corp. Tomtore, A.J., U.S. Patent 5,505,381; assignor to Wagner Spray Tech Corp. Tsuzuki, M. and H. Nishida, U.S. Patent 5,514,420; assignors to Honda Giken Kogyo K.K. Verschaeren, P.C.M., U.S. Patent 5,491,032, assignor to Hyplast N.V. Vicens, M.T., Powder Coating ‘96 Conference Proceedings, Indianapolis, September 1996, p. 33 Weinstein, R., U.S. Patent 5518,186; assignor to Asahi Sunac Corp. Woodhall, E.W. and N. Kodrats, U.S. Patent 5,523,117; assignors to Cal-West Equipment Co. Inc. Yaworski, A., U.S. Patent 5,505,387

STRIPPING Applications for sodium bicarbonate blast media in cleaning and stripping of airplane and aerospace components were discussed by Colbert (I). Kir68

schner and Yam and Kirschner received patents for sodium bicarbonate blast media formulations. The use of baking soda to strip carriers in an automotive painting plant was reported by Colbert (II). Abbott noted the benefits of dry media blasting for removal of coatings from aerospace surfaces. Plastic media blasting for stripping of powder coatings was addressed by Nudelman and Abbott. Crosley reviewed developments in the washing of paint masks including conversion from solvent- to waterbased materials. An ultra-high pressure water blasting process for removal of thermal spray coatings was described by Fricke. Keller et al. patented a method of electrolytically separating a paint coating from a metal surface. An abrasive disk for removing paint from a surface won a patent for Kitko and Kitko. Options for complying with the aerospace MACT standard for depainting including nonhazardous chemical strippers were provided by Bauer and Ruddy. Deemer reported on the development of a low-temperature, methylene-chloride-free paint stripper. Paint stripping compositions based on benzyl alcohols were patented by Sim, by Harbin (I), and by Langford and Erismann. Jarema (I and II) obtained a pair of patents for paint stripper compositions combining d-limonene and Nmethyl pyrrolidone. Paint stripping compositions were also the subject of patents awarded to Myers, to LeGrow, to Harbin (II), and to Ditaso. Shiotsu and Horiuchi, Honda, Baron et al., Ward, and Ward and Michelotti were granted patents relating to photoresist stripper compositions. References Abbott, K.E., Metal Finishing, 94(7):33; 1996 Baron. D.T. et al.. U.S. Patent 5.531.889: assianors’to Atotech USA Bauer, J.P. and E.N. Ruddy, Metal Finishing, 94(4):28; 1996

Colbert, K. (I), Metal Finishing, 94(4):53; 1996 Colbert, K. (II), Products Finishing, 60(8):102; 1996

Crosley, D., Metal Finishing, 94(10):33; 1996 Deemer, M., Powder Coating ‘96 Conference Proceedings, Indianapolis, September 1996, p. 289 Ditaso, J., U.S. Patent 5542,986; assignor to Elf Atochem North America Inc. Fricke. 32nd AESF Annual Aerosnace/Airline Plating and Metal Finishing Forum, Tulsa, Okla., April 30,-May 2, 1996, p. 15 Harbin, R.H. (I), U.S. Patent 5,454,985; assignor to Gage Products Co.

Harbin, R.H. (II), U.S. Patent 5,536,439; assignor to Gage Products Co. Honda, K., U.S. Patent 5,507,978; assignor to OCG Microelectronic Materials Inc. Jarema, C.P. (I), U.S. Patent 5,468,415; assignor to Specialty Environmental Technologies Inc. Jarema, C.P. (II), U.S. Patent 5,478,491; assignor to Specialty Environmental Technologies Inc. Keller, R. et al., U.S. Patent 5,507,926; assignors to EMEC Consultants Kiischner, L., U.S. Patent 5,509,971; assignor to Church & Dwight Co. Inc. Kirschner, L. and B.S. Yam, U.S. Patent 5,505,749; assignors to Church & Dwight Co. Inc. Kitko, EA. and F.R. Kitko, U.S. Patent 5,468,178 Langford, N.P. and D.W. Erismann, U.S. Patent 5,518,661; assignors to 3M Co. LeGrow, G.E., U.S. Patent 5,468,417; assignor to Dow Coming Corp. Myers, M.M., U.S. Patent 5,456,853; assignor to Rust-Oleum Corp. Nudelman, A.K. and K.E. Abbott, Powder Coating, 7(3):25; 1996

Shiotsu, S. and Y. Horiuchi, U.S. Patent, 5.480.585; assignors to Nagase Electronic Chemicals Ltd. Sim, J.O., U.S. Patent 5,487,789; assignor to McGean-Rohco Inc. Ward, I.E., U.S. Patent 5,554,312; assignor to Ashland Inc. Ward, I.E. and F.W. Michelotti, U.S. Patent 5,556,482; assignors to Ashland Inc.

TESTING AND CONTROL Grossman proposed more realistic cyclic tests for atmospheric corrosion to replace salt spray. One-year results of a study to correlate accelerated exposure testing and exterior exposure were reported by Carlozzo et al. Braun and Cobranchi found that initial gloss retention of automotive finishes involves film forming phenomena rather than weathering. A unified model for degradation of organic coatings on steel exposed to a neutral electrolyte was proposed by Nguyen et al. Feliu et al. conducted an impedance study of the effect of a thin rust layer at the steel/coating interface on deterioration of chlorinated rubber coatings. Bodnar stressed the importance of quality assurance from coating manufacture through application and provided a list of tests and standards. An apparatus for detecting finishing surface defects was patented by Shimbara et al. Nanna and Jereb obtained a patent for a gloss measurement system. An apparatus for determining the quality of a coating on a test plate using a potentiostat was patented by, Shih and Mekhjian. The measurement principles of magnetic and eddy current thickness METAL FINISHING

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FEBRUARY 1997