Abstracts of Technical Articles by Bell System Authors (01 October 1947)

Electrical Engineering, May 1947. Corrosion, May 1947. Phys. Rev., May 15, 1947. 900 ABSTRACTS OF TECHNICA L A KTICLES 9()1 Plating on Aluminum.4 R . A. EHRHARDT* and J. M. GUTHRIE. This article describes tests made to develop a satisfactory process for producing adherent electrodeposits on aluminum alloys using a zincate immersion pretreatment. Since the major interest was the fabrication of aluminum structures by the use of lead-tin solders the adherence of the deposit was determined by measuring the strength of soldered joints. Excellent results were obtained with commercially pure aluminum and copper bearing alloys and satisfactory results with magnesium and silicon bearing alloys. 

Corrective Networks.5 F. L. HOPPER. A type of fully compensated constant resistance network is described which provides a larger family of equalization characteristics particularly suited to corrective use in rerecording as determined by aural monitoring. Spectrochemical Analysis of Ceramics and Other Non-Metallic Materials.6 EDWIN K . JAYCOX. The procedure described is applicable to the quantitative spectrochemical analysis of ceramics, ashes, ores, paints, and other non-metallic materials for the determination of most of the common metals and their oxides. These include: aluminum, boron, barium, beryllium, calcium, copper, chromium, iron, lithium, magnesium, manganese, sodium, lead, silicon, titanium, zinc, and zirconium, in the general range of 0.30-70.0 per cent. Samples in the form of a fine powder are mixed one part of sample to 10-100 parts of a suitable metal oxide which serves as a buffer, diluent, and internal control.