New soldering process

CURRENT TOPICS New Soldering Process.--A revolutionary new soldering process for use in the manufacture of automotive radiators and other heat exchange equipment has been developed by McCord Corporation of Detroit, Mich., in cooperation with Mathieson Chemical Corporation, Baltimore, Md. Called the "Coronil Soldering Process," the novel chemical-metallurgical method employs a new series of soldering fluxes bearing the trade name M.C.C. which were discovered by McCord and developed cooperatively with Mathieson. These M.C.C. fluxes are suitable for use in joining most of the commonly used metals and produce solder bonds of highest strength, leave no corrosive residues and eliminate corrosion of plant equipment. Successful production tests and field studies culminated an intensive research and development program which extended over a period of several years. The new process, considered by McCord as the most important contribution to the art since the development of soldering as a method for joining metals, eliminates substantial corrosion losses previously encountered, simplifies production methods and produces radiators of superior strength which are less likely to be troubled with corrosion in the field. M.C.C. fluxes are made from hydrazine, a Mathieson chemical with many potential uses. Hydrazine was first used on a large scale as a rocket fuel by the Germans in World War II, and has since found commercial application in the pharmaceutical, agricultural, metal finishing and synthetic fibre fields. Early research by McCord determined that certain hydrazine compcunds answered the requirements of an ideal soldering flux, and a cooperative laboratory and plant experimental program with Mathieson resulted in the development. The "Coronil Soldering Process," in use for some time at one McCord plant, will be extended to operations in its other plants in the near future. The M.C.C. fluxes, available from Mathieson through an arrangement with McCord, have already found application in the manufacture of electronic equipment and in other industries. New Type Cathode Gives Electron Tubes Longer Life.--Announcement of a new type cathode by Philips Laboratories, Inc., trvington-on-Hudson, N.Y., will make possible production of electron tubes of higher current output with longer uniform life. Electron tube design has hitherto been restricted by the limitations of the cathode, electron-emitting heart of every tube and most critical tube element. According to Dr. O. S. Duffendack, President and Director of Research, "it is the first basically new cathode in over 25 years." Named the " L " Cathode in honor of one of the scientists who originated it in the Philips Research Laboratories in Holland, the cathode was further developed by the Philips Laboratories here. Entirely new in principle, the cathode from its reservoir produces a regulated amount of emissive material. This provides long uniform tube IOl