Mass spectral and chromatographic-mass spectral study of nitrogenous bases from medium distillates

Chemistry and Technology of Fuels and Oils -     

Effect of electric resistance heating on the structure of wear-resisting nickel-chrome coatings

Translated from Poroshkovaya Metallurgiya, No. 5(329), pp. 47–52, May, 1990.     

Quo vadis,lition?

Projections of lithium metal requirements to satisfy the needs of the automotive and storage batteries have imposed an enormous demand on the lithium industry. These mathematical projections have been based on various demand assumptions and have raised questions on the ability of the industry to supply such a demand. A review of supply and demand projections suggests that the gap may not be as wide as led to believe.Confidence in the future supply of sufficient lithium is further strengthened by the discovery of lithium brines of the Salar de Atacama, where the Foote Mineral Company has been evaluating the feasibility of developing an additional source of lithium chemicals. The geology, geochemistry and reserves of the salar suggest a vast supply for the future.     

Influence of corrosive media on the fatigue strength of duralumin in relation to the loading frequency

Electrode potentials of D16T duralumin specimens during fatigue tests in a 3% NaCl solution at loading frequencies of 200 and 3000 cpm were measured and the fatigue strength of this material tested in air and water at loading frequencies of 200 and 6000 cpm was determined. It was established that the effect of corrosive media on the fatigue limit and endurance of duralumin depends on the loading frequency.