process, util izing an enclosed decomposition t ank which includes a pickle liquor inlet pipe, an outlet pipe, at least one vent pipe, an internal baffle, and a heat source.

HYDROGEN PEROXIDE PICKLING OF SILICON-

CONTAINING ELECTRICAL STEEL GRADES EP 1377692 (Properties Inc AK) Vanscoy, C.A.; Leeker, J.W. et alo Pickling process designed for pickling electrical steel strip in a continuous fashion and comprises at least one pickling tank equipped with at least one set of sprayers designed to spray the top and bottom sur- faces of a steel strip with a solution of hydrogen per- oxide prior to and/or after the strip is immersed in a solution contained in a pickling tank. The set(s) of sprayers in each of the pickling tanks are located above the level of the pickle bath solution, ra ther than being located in separate spray tanks. Upon exiting the final pickling tank, the strip is brushed/scrubbed to loosen any res idual scale to form a clean strip.

METAL PRODUCT SURFACE-TREATED WITH ALKALI-

SOLUBLE LUBRICATING FILM EXHIBITING EXCELLENT

FORMABILITY A N D EXCELLENT FILM REMOVAL

PROPERTY BEING STABLE FOR A LONG TIME A N D

INDEPENDENT OF TEMPERATURE FOR DRYING FILM EP 1378345 (Mitsui Takeda Chemicals Inc.) Kanai, H.; Kouda, C. et al. Alkali-soluble polyure thane aq. comp'n with poly-

e ther polyol as skeleton for film thickness up to 10pm as stable lubricant for pressing, drawing etc.

BACK-END METALLISATION PROCESS EP 1377696 (Koninkl Philips .Electronic NV) Meulenkamp, E.A.; Schroevers, M.J.

SURFACE-TREATED METAL SHEET EP 1378547 (Toyo Boseki) Shimizu, T; Odashima, H. et al. Chromate-free conversion coating composition for t rea t ing metal surface comprising (a) a hydroxyl group-containing organic resin, (b) a phosphoric acid and (c) at least one of ions and compounds of at least one metal selected from the group consisting of Cu, Co, Fe, Mn, Sn, V, Mg, Ba, AI, Ca, Sr, Nb, Y and Zn, and optionally (d) at least one of colloids (sol) or pow- ders of SiO2, SnO2, Cr203, Fe203, Fe304, MgO, ZrO2, A1203 and Sb205; as well as a metal sheet or metal article having thereon (i) a coating film of the Cr-free composition and optionally (ii) a coating film of a coating composition comprising an organic resin and if desired a colloid (sol) or a powder.

METHOD OF FORMING A HOLLOW CHANNEL ON THE

SURFACE OF A METAL SUBSTHATE, A N D RELATED

ARTICLES EP 1378583 (Gen. Electric) Lee, C.P.; Hasz, W.C. Forming of cooling channels for rocket engines or gas

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July/August 2004 89

turbines by methods such as electroforming where channel-forming material is then removed, after trench has been covered, eog by melting, chemical dissolution or mechanical removal.

ELECTROLESS NICKEL PLATING SOLUTIONS EP 1378584 (Atotech Deutschland GmbH) Shahin, G.E. Electroless nickel plating solutions based on nickel salts of alkyl sulfonic acids as the source of nickel ions. The plating solutions utilize, as a reducing agent, hypophosphorous acid or bath soluble salts thereof selected from sodium hypophosphite, potassi- um hypophosphite and ammonium hypophosphite. These solutions are free of added nickel hypophos- phite, and free of alkali or alkaline earth metal ions capable of forming an insoluble orthophosphite.

CORROSION RESISTANT TRIVALENT CHROMIUM PHOSPHATED CHEMICAL CONVERSION COATINGS EP 1378585 (United Technologies Corp.) Bhatia, P. An acidic aqueous solution containing a water solu- ble trivalent chromium compound is provided with

an additive for improving corrosion resistance and reducing precipitation of trivalent chromium over time. A suitable additive is nitrilotris (methylene) triphosphonic acid (NTMP).

HIGH-TEMPERATURE ARTICLES AND METHOD FOR M A K I N G THESE EP 1378587 (Gen. Electric) Zhao, J.C.; Lipkin, D.M. Nickel aluminide coated metal article has substan- tially single-phase coating comprising nickel (Ni) and at least about 30 atomic percent aluminum (A1); the coating further comprises a gradient in A1 com- position, the gradient extending from a first A1 con- centration level at an outer surface of the coating to a second A1 concentration level at an interface between the substantially single-phase coating and the substrate, wherein the first A1 concentration level is greater than the second A1 concentration level and the second concentration level is at least about 30 atomic percent A1

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90 Metal Finishing