An improved barium sulphate method for the determination of sulphur in steel

Abstract

The conventional barium sulphate method for sulphur in steel is critically reviewed with particular reference to its performance on chromium steels. It is shown that serious error can occur firom loss of sulphur by co-precipitation with basic chromium compounds formed during the baking treatment to remove residual nitrate, and because of this and the difficulty of ensuring effective control of the baking operation the reliable range of the method is limited to comparatively simple steels.

Ferrous Metallurgy

“…The amount of molybdenum was estimated by means of the thiocyanate color complex. NICKEL Conditions for precipitation of nickel with dimethylglyoxime without interference from copper or cobalt were studied (8).…”

“…In the gravimetric method, coprecipitation with basic chromium compounds was avoided by use of hydroxylamine in place of baking to remove residual nitrate (9). The method was recommended for all highly alloyed steels except those high in titanium.…”