This spark determines environmental corrosion!
Ford M o t o r C o m p a n y Engineering Research uses emission spectroscopy to study external radiator corrosion in all sections of the U.S.A. Environmental conditions in various locations contribute to the rate of wear and corrosion of automobile radiators. Emission spectroscopy is proving invaluable as a means of measuring corrosive element concentrations obtained under actual driving conditions. Containers filled with distilled water are mounted on lest cars to collect minute road and air particles from the area. Test samples are returned to the research spectros copy laboratory at Dearborn for analysis. The result: spectrum, recorded on film, telling the external radiator corrosion problems by environment. This is an important aid for the development and manufacture of future radia tor materials.
How NATIONAL Graphite helps measure those corrosive elements Test samples are divided into soluble and insoluble por tions, mixed with "National" Graphite grade SP-2 power and arced to completion at 13 amps in necked, deep cratered electrodes. Be sure to specify "National" for your spectroscopic work. This brand of graphite is accompanied by a "state ment of purity" stating the trace-elements present. Your analyst is thus forewarned against errors arising from unexpected spectral lines.
N
ATIONAL
GRAPHITE
UNION CARBIDE
TRADE MARK
ELECTRODES
The terms "National" and "Union Carbide" are registered trade-marks of Union Carbide Corporation NATIONAL C A R B O N C O M P A N Y · Division of Union Carbide Corporation · 30 East 42ndStreet, New York 17, Ν. Υ. Sates Offices: Atlanta, Chicago, Dallas, Kansas City, Los Angeles, New York, Pittsburgh, San Francisco. In Canada: Union Carbide Canada Limited, Toronto. For further information, circle number 79 A on Readers' Service Card, page 67 A VOL.
30, NO. 4, APRIL 1958
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79 A
